Fix GH-22142: Assertion failure in zendi_try_get_long() on IS_UNDEF.

close GH-22143

Author: devnexen

NEWS

@@ -19,6 +19,8 @@ PHP                                                                        NEWS
   . Enabled the TAILCALL VM on Windows when compiling with Clang >= 19 x86_64.
     (henderkes)
   . Deprecate specifying a nullable return type for __debugInfo(). (timwolla)
+  . Fixed bug GH-22142 (Assertion failure in zendi_try_get_long() on IS_UNDEF).
+    (David Carlier)
 
 - BCMath:
   . Added NUL-byte validation to BCMath functions. (jorgsowa)

Zend/zend_operators.c

@@ -448,6 +448,7 @@ static zend_never_inline zend_long ZEND_FASTCALL zendi_try_get_long(const zval *
 				ZEND_ASSERT(Z_TYPE(dst) == IS_LONG);
 				return Z_LVAL(dst);
 			}
+		case IS_UNDEF:
 		case IS_RESOURCE:
 		case IS_ARRAY:
 			*failed = true;

ext/zlib/tests/gh22142.phpt

@@ -0,0 +1,20 @@
+--TEST--
+GH-22142 (Assertion failure in zendi_try_get_long() on IS_UNDEF)
+--EXTENSIONS--
+zlib
+--FILE--
+<?php
+
+class Options {
+    public int $level;
+}
+
+try {
+    deflate_init(ZLIB_ENCODING_DEFLATE, new Options());
+} catch (TypeError $e) {
+    echo $e->getMessage(), PHP_EOL;
+}
+
+?>
+--EXPECT--
+deflate_init(): Argument #2 ($options) the value for option "level" must be of type int, null given