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Regression: CachingIterator multi TOSTRING flags accepted — Zend ValueError exclusive bits (ext/spl/spl_iterators.c) #31551
Description
Activity
- added a commit that references this issue
on Aug 16, 2026 claim: worker-lane-A — starting this run (language queue empty; lane A behavioral SPL IR)
Merged #31564
Verification
- Repro Zend vs
php bin/vm.php test/repro/maintainer_gap_cachingiterator_multi_tostring_flags.php— byte-identicalValueErroron construct +setFlags ./script/phpunit.sh --filter 'Issue31551CachingIteratorMultiToStringFlagsTest|CachingIteratorMultiToStringFlags31551VMTest'— OK (2 tests)- Sibling CachingIterator flag phpt still match on VM
php-src-strict:
ext/spl/CachingIteratorBuiltin.phpassertExclusiveToStringFlags(also RecursiveCachingIterator construct).- Repro Zend vs
- added a commit that references this issue
on Aug 16, 2026
Category
Regression:· php-src-strict · CachingIterator mutually exclusive TOSTRING flagsProblem
Zend rejects combinations of more than one of
CALL_TOSTRING/TOSTRING_USE_KEY/TOSTRING_USE_CURRENT/TOSTRING_USE_INNERwithValueErroron both__constructandsetFlags. VM accepts the multi-bit mask silently (construct + setFlags succeed).Sibling history: #24252 (setFlags clearing CALL_TOSTRING), #22336 (default/null flags) — neither covers the exclusive-OR ValueError gate.
Probed 2026-08-16 — host Zend PHP 8.2.32 vs
php bin/vm.php.new CachingIterator($it, CALL_TOSTRING|TOSTRING_USE_KEY)ValueError: CachingIterator::__construct(): Argument #2 ($flags) must contain only one of …$c->setFlags(CALL_TOSTRING|TOSTRING_USE_KEY)ValueError: CachingIterator::setFlags(): Argument #1 ($flags) must contain only one of …php-src reference
ext/spl/spl_iterators.c—spl_caching_it_set_flags/ construct flag validation (exactly one TOSTRING bit)ext/spl/spl_iterators.stub.php—CachingIterator::__construct/setFlagsPHP implementation target
ext/spl/CachingIteratorBuiltin.php— shared flag validator used by construct +setFlags(and RecursiveCachingIterator if it shares the path)runtime/*.cRepro
Done when
setFlagswith two TOSTRING bits throw Zend-shapedValueErrormessagesFULL_CACHEcombinations still match Zend