error: cannot find attribute `derive` in this scope

[taiki-e]

Since nightly-2021-02-08, our test suite failed to compile.

related: rust-lang/rust#79078, rust-lang/rust#79202

rustc: rustc 1.52.0-nightly (9778068cb 2021-02-07)

https://github.com/taiki-e/pin-project/runs/1851328341?check_suite_focus=true

log

error: cannot find attribute `derive` in this scope
 --> tests/no-core/../include/basic-safe-part.rs:4:3
  |
4 | #[derive(Debug)]
  |   ^^^^^^

error: cannot find attribute `derive` in this scope
 --> tests/no-core/../include/basic-safe-part.rs:3:1
  |
3 | #[::pin_project::pin_project]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
 --> tests/no-core/../include/basic-safe-part.rs:6:7
  |
6 |     #[pin]
  |       ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:15:3
   |
15 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:11:1
   |
11 | / #[::pin_project::pin_project(
12 | |     project = DefaultStructNamedProj,
13 | |     project_ref = DefaultStructNamedProjRef,
14 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:17:7
   |
17 |     #[pin]
   |       ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:23:3
   |
23 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:22:1
   |
22 | #[::pin_project::pin_project]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:24:39
   |
24 | pub struct DefaultTupleStruct<T, U>(#[pin] pub T, pub U);
   |                                       ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:30:3
   |
30 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:26:1
   |
26 | / #[::pin_project::pin_project(
27 | |     project = DefaultTupleStructNamedProj,
28 | |     project_ref = DefaultTupleStructNamedProjRef,
29 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:31:44
   |
31 | pub struct DefaultTupleStructNamed<T, U>(#[pin] pub T, pub U);
   |                                            ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:37:3
   |
37 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:33:1
   |
33 | / #[::pin_project::pin_project(
34 | |     project = DefaultEnumProj,
35 | |     project_ref = DefaultEnumProjRef,
36 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:40:11
   |
40 |         #[pin]
   |           ^^^

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:44:13
   |
44 |     Tuple(#[pin] T, U),
   |             ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:49:3
   |
49 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:48:1
   |
48 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:51:7
   |
51 |     #[pin]
   |       ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:62:3
   |
62 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:61:1
   |
61 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:63:42
   |
63 | pub struct PinnedDropTupleStruct<T, U>(#[pin] pub T, pub U);
   |                                          ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:75:3
   |
75 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:70:1
   |
70 | / #[::pin_project::pin_project(
71 | |     PinnedDrop,
72 | |     project = PinnedDropEnumProj,
73 | |     project_ref = PinnedDropEnumProjRef,
74 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:78:11
   |
78 |         #[pin]
   |           ^^^

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:82:13
   |
82 |     Tuple(#[pin] T, U),
   |             ^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:92:3
   |
92 | #[derive(Debug)]
   |   ^^^^^^

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:91:1
   |
91 | #[::pin_project::pin_project(project_replace)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:94:7
   |
94 |     #[pin]
   |       ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:104:3
    |
104 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:99:1
    |
99  | / #[::pin_project::pin_project(
100 | |     project = ReplaceStructNamedProj,
101 | |     project_ref = ReplaceStructNamedProjRef,
102 | |     project_replace = ReplaceStructNamedProjOwn,
103 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:106:7
    |
106 |     #[pin]
    |       ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:112:3
    |
112 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:111:1
    |
111 | #[::pin_project::pin_project(project_replace)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:113:39
    |
113 | pub struct ReplaceTupleStruct<T, U>(#[pin] pub T, pub U);
    |                                       ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:120:3
    |
120 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:115:1
    |
115 | / #[::pin_project::pin_project(
116 | |     project = ReplaceTupleStructNamedProj,
117 | |     project_ref = ReplaceTupleStructNamedProjRef,
118 | |     project_replace = ReplaceTupleStructNamedProjOwn,
119 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:121:44
    |
121 | pub struct ReplaceTupleStructNamed<T, U>(#[pin] pub T, pub U);
    |                                            ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:128:3
    |
128 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:123:1
    |
123 | / #[::pin_project::pin_project(
124 | |     project = ReplaceEnumProj,
125 | |     project_ref = ReplaceEnumProjRef,
126 | |     project_replace = ReplaceEnumProjOwn,
127 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:131:11
    |
131 |         #[pin]
    |           ^^^

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:135:13
    |
135 |     Tuple(#[pin] T, U),
    |             ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:140:3
    |
140 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:139:1
    |
139 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:142:7
    |
142 |     #[pin]
    |       ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:148:3
    |
148 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:147:1
    |
147 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:149:43
    |
149 | pub struct UnsafeUnpinTupleStruct<T, U>(#[pin] pub T, pub U);
    |                                           ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:156:3
    |
156 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:151:1
    |
151 | / #[::pin_project::pin_project(
152 | |     UnsafeUnpin,
153 | |     project = UnsafeUnpinEnumProj,
154 | |     project_ref = UnsafeUnpinEnumProjRef,
155 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:159:11
    |
159 |         #[pin]
    |           ^^^

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:163:13
    |
163 |     Tuple(#[pin] T, U),
    |             ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:168:3
    |
168 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:167:1
    |
167 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:170:7
    |
170 |     #[pin]
    |       ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:176:3
    |
176 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:175:1
    |
175 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:177:40
    |
177 | pub struct NotUnpinTupleStruct<T, U>(#[pin] pub T, pub U);
    |                                        ^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:184:3
    |
184 | #[derive(Debug)]
    |   ^^^^^^

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:179:1
    |
179 | / #[::pin_project::pin_project(
180 | |     !Unpin,
181 | |     project = NotUnpinEnumProj,
182 | |     project_ref = NotUnpinEnumProjRef,
183 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:187:11
    |
187 |         #[pin]
    |           ^^^

error: cannot find attribute `pin` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:191:13
    |
191 |     Tuple(#[pin] T, U),
    |             ^^^

error: cannot find attribute `derive` in this scope
 --> tests/no-core/../include/basic-safe-part.rs:3:1
  |
3 | #[::pin_project::pin_project]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:11:1
   |
11 | / #[::pin_project::pin_project(
12 | |     project = DefaultStructNamedProj,
13 | |     project_ref = DefaultStructNamedProjRef,
14 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:22:1
   |
22 | #[::pin_project::pin_project]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:26:1
   |
26 | / #[::pin_project::pin_project(
27 | |     project = DefaultTupleStructNamedProj,
28 | |     project_ref = DefaultTupleStructNamedProjRef,
29 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:33:1
   |
33 | / #[::pin_project::pin_project(
34 | |     project = DefaultEnumProj,
35 | |     project_ref = DefaultEnumProjRef,
36 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:48:1
   |
48 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:61:1
   |
61 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:70:1
   |
70 | / #[::pin_project::pin_project(
71 | |     PinnedDrop,
72 | |     project = PinnedDropEnumProj,
73 | |     project_ref = PinnedDropEnumProjRef,
74 | | )]
   | |__^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
  --> tests/no-core/../include/basic-safe-part.rs:91:1
   |
91 | #[::pin_project::pin_project(project_replace)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:99:1
    |
99  | / #[::pin_project::pin_project(
100 | |     project = ReplaceStructNamedProj,
101 | |     project_ref = ReplaceStructNamedProjRef,
102 | |     project_replace = ReplaceStructNamedProjOwn,
103 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:111:1
    |
111 | #[::pin_project::pin_project(project_replace)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:115:1
    |
115 | / #[::pin_project::pin_project(
116 | |     project = ReplaceTupleStructNamedProj,
117 | |     project_ref = ReplaceTupleStructNamedProjRef,
118 | |     project_replace = ReplaceTupleStructNamedProjOwn,
119 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:123:1
    |
123 | / #[::pin_project::pin_project(
124 | |     project = ReplaceEnumProj,
125 | |     project_ref = ReplaceEnumProjRef,
126 | |     project_replace = ReplaceEnumProjOwn,
127 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:139:1
    |
139 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:147:1
    |
147 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:151:1
    |
151 | / #[::pin_project::pin_project(
152 | |     UnsafeUnpin,
153 | |     project = UnsafeUnpinEnumProj,
154 | |     project_ref = UnsafeUnpinEnumProjRef,
155 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:167:1
    |
167 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:175:1
    |
175 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `derive` in this scope
   --> tests/no-core/../include/basic-safe-part.rs:179:1
    |
179 | / #[::pin_project::pin_project(
180 | |     !Unpin,
181 | |     project = NotUnpinEnumProj,
182 | |     project_ref = NotUnpinEnumProjRef,
183 | | )]
    | |__^
    |
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
 --> tests/no-core/../include/basic-safe-part.rs:3:1
  |
3 | #[::pin_project::pin_project]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
  |
  = note: `-D legacy-derive-helpers` implied by `-D warnings`
  = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
  = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:11:1
   |
11 | / #[::pin_project::pin_project(
12 | |     project = DefaultStructNamedProj,
13 | |     project_ref = DefaultStructNamedProjRef,
14 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:22:1
   |
22 | #[::pin_project::pin_project]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:26:1
   |
26 | / #[::pin_project::pin_project(
27 | |     project = DefaultTupleStructNamedProj,
28 | |     project_ref = DefaultTupleStructNamedProjRef,
29 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:33:1
   |
33 | / #[::pin_project::pin_project(
34 | |     project = DefaultEnumProj,
35 | |     project_ref = DefaultEnumProjRef,
36 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:48:1
   |
48 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:61:1
   |
61 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:70:1
   |
70 | / #[::pin_project::pin_project(
71 | |     PinnedDrop,
72 | |     project = PinnedDropEnumProj,
73 | |     project_ref = PinnedDropEnumProjRef,
74 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:91:1
   |
91 | #[::pin_project::pin_project(project_replace)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:99:1
    |
99  | / #[::pin_project::pin_project(
100 | |     project = ReplaceStructNamedProj,
101 | |     project_ref = ReplaceStructNamedProjRef,
102 | |     project_replace = ReplaceStructNamedProjOwn,
103 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:111:1
    |
111 | #[::pin_project::pin_project(project_replace)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:115:1
    |
115 | / #[::pin_project::pin_project(
116 | |     project = ReplaceTupleStructNamedProj,
117 | |     project_ref = ReplaceTupleStructNamedProjRef,
118 | |     project_replace = ReplaceTupleStructNamedProjOwn,
119 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:123:1
    |
123 | / #[::pin_project::pin_project(
124 | |     project = ReplaceEnumProj,
125 | |     project_ref = ReplaceEnumProjRef,
126 | |     project_replace = ReplaceEnumProjOwn,
127 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:139:1
    |
139 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:147:1
    |
147 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:151:1
    |
151 | / #[::pin_project::pin_project(
152 | |     UnsafeUnpin,
153 | |     project = UnsafeUnpinEnumProj,
154 | |     project_ref = UnsafeUnpinEnumProjRef,
155 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:167:1
    |
167 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:175:1
    |
175 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:179:1
    |
179 | / #[::pin_project::pin_project(
180 | |     !Unpin,
181 | |     project = NotUnpinEnumProj,
182 | |     project_ref = NotUnpinEnumProjRef,
183 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
 --> tests/no-core/../include/basic-safe-part.rs:3:1
  |
3 | #[::pin_project::pin_project]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
  |
  = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
  = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:11:1
   |
11 | / #[::pin_project::pin_project(
12 | |     project = DefaultStructNamedProj,
13 | |     project_ref = DefaultStructNamedProjRef,
14 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:22:1
   |
22 | #[::pin_project::pin_project]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:26:1
   |
26 | / #[::pin_project::pin_project(
27 | |     project = DefaultTupleStructNamedProj,
28 | |     project_ref = DefaultTupleStructNamedProjRef,
29 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:33:1
   |
33 | / #[::pin_project::pin_project(
34 | |     project = DefaultEnumProj,
35 | |     project_ref = DefaultEnumProjRef,
36 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:48:1
   |
48 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:61:1
   |
61 | #[::pin_project::pin_project(PinnedDrop)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:70:1
   |
70 | / #[::pin_project::pin_project(
71 | |     PinnedDrop,
72 | |     project = PinnedDropEnumProj,
73 | |     project_ref = PinnedDropEnumProjRef,
74 | | )]
   | |__^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
  --> tests/no-core/../include/basic-safe-part.rs:91:1
   |
91 | #[::pin_project::pin_project(project_replace)]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:99:1
    |
99  | / #[::pin_project::pin_project(
100 | |     project = ReplaceStructNamedProj,
101 | |     project_ref = ReplaceStructNamedProjRef,
102 | |     project_replace = ReplaceStructNamedProjOwn,
103 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:111:1
    |
111 | #[::pin_project::pin_project(project_replace)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:115:1
    |
115 | / #[::pin_project::pin_project(
116 | |     project = ReplaceTupleStructNamedProj,
117 | |     project_ref = ReplaceTupleStructNamedProjRef,
118 | |     project_replace = ReplaceTupleStructNamedProjOwn,
119 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:123:1
    |
123 | / #[::pin_project::pin_project(
124 | |     project = ReplaceEnumProj,
125 | |     project_ref = ReplaceEnumProjRef,
126 | |     project_replace = ReplaceEnumProjOwn,
127 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:139:1
    |
139 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:147:1
    |
147 | #[::pin_project::pin_project(UnsafeUnpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:151:1
    |
151 | / #[::pin_project::pin_project(
152 | |     UnsafeUnpin,
153 | |     project = UnsafeUnpinEnumProj,
154 | |     project_ref = UnsafeUnpinEnumProjRef,
155 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:167:1
    |
167 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:175:1
    |
175 | #[::pin_project::pin_project(!Unpin)]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: derive helper attribute is used before it is introduced
   --> tests/no-core/../include/basic-safe-part.rs:179:1
    |
179 | / #[::pin_project::pin_project(
180 | |     !Unpin,
181 | |     project = NotUnpinEnumProj,
182 | |     project_ref = NotUnpinEnumProjRef,
183 | | )]
    | |__^ the attribute is introduced here
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 119 previous errors

error: could not compile `no-core`

[Aaron1011]

All of these errors appear to be caused by the fact that #[derive] is now a normal attribute, and will therefore not be imported by default with #![no_core]. Adding use _core::prelude::v1::derive; to tests/no-core/lib.rs fixed all of the errors for me locally.

The "derive helper attribute is used before it is introduced" lint appears to be spurious. I suspect it's caused by the recovery code in rustc (which is based on checking for a literal 'derive' ident, ignoring resolution) running when #[derive] is not actually in scope.

[Aaron1011]

Opened rust-lang/rust#81871 to track the spurious legacy_derive_helpers lint

[taiki-e]

@Aaron1011 Thanks! I've confirmed that we can fix the problem by the way you mentioned.