env -a is not supported on Windows

[oech3]

coreutils/src/uu/env/locales/en-US.ftl

Line 40 in c610149

env-error-argv0-not-supported = --argv0 is currently not supported on this platform

Is this because Windows has limitation for argv[0] change or just not impremented yet?

[ChrisDenton]

This is just a missing feature of the Rust standard library. It could be implemented fairly easily to someone knowledgeable, though it would likely require an API Change Proposal (ACP) first.