Regression: DateMalformedPeriodException class_exists true on PHP 8.2 reference profile (ext/date/php_date.c)

Problem

DateMalformedPeriodException is a PHP 8.3+ class in php-src. On the Zend 8.2 reference profile, class_exists('DateMalformedPeriodException') is false. This compiler registers the class unconditionally — class_exists returns true on the default profile, a phantom parity gap vs Zend 8.2.

Repro	Zend 8.2	VM (2026-07-06)
`class_exists('DateMalformedPeriodException')`	`false`	`true` ❌

Sibling DateMalformedIntervalException may share the same gate drift (audit both).

php-src reference

php/php-src ext/date/php_date.c — date exception class registration (8.3+)
php/php-src ext/date/php_date.stub.php

PHP implementation target

ext/date/Module.php — gate registration on CompilerVersion::supportsDateMalformedExceptions() (or equivalent 8.3+ profile flag)
lib/CompilerVersion.php — introspection policy aligned with Zend reference profile

Repro

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php -r "var_export(class_exists(\"DateMalformedPeriodException\"));" && php bin/vm.php -r "var_export(class_exists(\"DateMalformedPeriodException\"));"'
# Zend: false · VM: true

Done when

class_exists('DateMalformedPeriodException') is false on 8.2 reference profile; true only when profile ≥ 8.3
Compliance guard under test/compliance/cases/date/
php-src-strict; pairs with DateMalformedIntervalException if applicable

claim: cursor-agent-lane-b — starting this run

claim released: repro green on master — both Zend 8.2 and VM return false for class_exists('DateMalformedPeriodException'); ThrowableProfilePhantomTest passes. Pivoting to next lane-B issue.

claim: cursor-agent-lane-b — behavior green on master; adding missing reference-profile compliance guard per done-when.

Fix date reference-profile compliance guards for DateMalformed* (#16888…

Merged via #16896.

Root cause: Runtime behavior was already correct (ThrowableManifest::isAdvertised + CompilerVersion::advertisesDateExceptionHierarchy()), but reference-profile compliance tests were never executed — VMTest/JITTest skipped any case name containing dateexception/date_malformed without exempting reference_profile (unlike request_parse_body_exception).

Fix: Exempt reference_profile from the reference-profile skip; extend dateexception_reference_profile.phpt; add test/compliance/cases/date/date_malformed_exceptions_phantom_reference_profile.phpt + maintainer repro.

Verification:

php -r "var_export(class_exists('DateMalformedPeriodException'));"  # false
php bin/vm.php -r "var_export(class_exists('DateMalformedPeriodException'));"  # false
vendor/bin/phpunit --filter 'dateexception_reference_profile|date_malformed_exceptions_phantom'  # OK (4)

chore: drop 24 more stale maintainer_gap repros (wave30 batch 2, #16660…

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Regression: DateMalformedPeriodException class_exists true on PHP 8.2 reference profile (ext/date/php_date.c) #16888

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Regression: DateMalformedPeriodException class_exists true on PHP 8.2 reference profile (ext/date/php_date.c) #16888

Description

Category

Problem

php-src reference

PHP implementation target

Repro

Done when

Activity

PurHur commented on Jul 6, 2026

PurHur commented on Jul 6, 2026

PurHur commented on Jul 6, 2026

PurHur commented on Jul 6, 2026

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