Language: (int)/(float) cast on backed enum regression vs closed #5714 (zend_operators.c)

[PurHur]

Category

language

Problem

Zend emits E_WARNING and yields 1 (legacy object-to-int) when casting a backed enum case with (int) / (float) — not the backing value. #5714 was closed, but VM still prints 42 for (int) E::A with case A = 42.

php-src reference

• php/php-src Zend/zend_operators.c — zend_cast_to_long on enum objects
• php/php-src Zend/zend_enum.c

Repro

test/repro/parity_enum_int_cast.php:

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php8.2 test/repro/parity_enum_int_cast.php 2>&1 | tail -2
php bin/vm.php test/repro/parity_enum_int_cast.php 2>&1 | tail -2'

Runtime	stdout (after warning)
Zend	1
VM	42

Scope

• lib/VM/EnumCaseSupport.php — scalarCastEnumCase / int&float cast paths (Language: (int)/(float) cast on backed enum case uses backing value — Zend warns and yields 1 (zend_operators.c) #5714)
• lib/JIT/ + lib/VM/CastSupport.php if casts compile to backing read
• Compliance: extend test/compliance/cases/language/int_cast_backed_enum.phpt

Done when

• VM: warning + 1 for (int) E::A (not backing 42)
• (float) same legacy 1.0 behavior
• ./script/ci-fast.sh --filter int_cast_backed_enum green

Related

• Language: (int)/(float) cast on backed enum case uses backing value — Zend warns and yields 1 (zend_operators.c) #5714 (closed) · Stdlib: intval()/floatval()/doubleval() on backed enum cases — Zend E_WARNING + coercion, not LogicException (ext/standard/type.c) #5623 intval/floatval · test/repro/parity_enum_int_cast.php

[PurHur]

claim: worker-lane-c — starting this run

[PurHur]

Merged via #5811.

Verification

• Repro: Zend + VM both warn and print 1 for (int) E::A (backing 42).
• ./vendor/bin/phpunit --filter int_cast_backed_enum → OK (VM compliance).

JIT lowering is in JitZendScalarCast; compliance JIT skipped until enum-declare MCJIT (#3518) is stable.