Stdlib: iterator_to_array(null $preserve_keys) TypeError under strict_types (#31340)

[PurHur]

Summary

• Fix iterator_to_array(..., null) $preserve_keys under declare(strict_types=1) to match Zend/php-src Z_PARAM_BOOL (TypeError instead of coercing via toBool()).
• Soft-null (non-strict) emits E_DEPRECATED and coerces to false via shared parseBoolBuiltinArgForFrame / JitBoolArg::lowerCoerceZParamBool.
• Omit-arg still defaults preserve_keys=true.

Closes #31340

php-src: ext/spl/iterator.c / ext/spl/spl.stub.php

Test plan

• ./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/issue_31340_iterator_to_array_null_preserve_keys.php'
• ./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php bin/jit.php test/repro/…'
• ./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php bin/compile.php -o /tmp/ita31340 test/repro/… && /tmp/ita31340'
• ./script/phpunit.sh --filter IteratorToArrayNullPreserveKeysStrict31340 (VM + JIT + soft DEP)
• ./script/phpunit.sh --filter iterator_to_array_null_preserve_keys_strict --group aot

Verification transcript

TypeError: iterator_to_array(): Argument #2 ($preserve_keys) must be of type bool, null given
OK (3 tests, 3 assertions)  # dedicated VM/JIT provider
OK (1 test, 5 assertions)    # AOT group filter

Made with Cursor