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Regression: AOT DateTime::diff() segfaults after build — VM/JIT match Zend (ext/date/php_date.c) #27309
Description
Category
bug · php-src-strict · AOT / ext/date
Problem
$a->diff($b)->days for 2024-01-01 → 2024-01-10 prints 9 on Zend, VM, and JIT. Thin AOT builds successfully, then the binary segfaults (exit 139) with phpc: fatal signal (segfault) after c:main_before_php.
Closed #26693 covered fractional $f on VM; this is AOT crash with VM/JIT green.
| Repro | Zend / VM / JIT (2026-08-03) | AOT |
|---|---|---|
DateTime('2024-01-01')->diff(DateTime('2024-01-10'))->days |
9 |
segfault after c:main_before_php |
Verified on master f20c74a10.
php-src reference
- php/php-src
ext/date/php_date.c—date_diff/DateTime::diff - php/php-src
ext/date/php_date.stub.php—DateTime::diff(DateTimeInterface $target, bool $absolute = false): DateInterval
PHP implementation target
- Fix AOT lowering for
DateTime::diff()/date_diff()→DateIntervalinext/date/+lib/JIT/(PHP-in-PHP) - No new C in
runtime/
Repro
./script/docker-exec.sh -- bash -lc '
cat >/tmp/dt_diff.php <<'"'"'P'"'"'
<?php
$a = new DateTime("2024-01-01");
$b = new DateTime("2024-01-10");
echo $a->diff($b)->days, PHP_EOL;
P
php /tmp/dt_diff.php
php bin/vm.php /tmp/dt_diff.php
php bin/jit.php /tmp/dt_diff.php
./phpc build -o /tmp/dt_diff.bin /tmp/dt_diff.php && /tmp/dt_diff.bin
'Done when
- AOT prints
9matching Zend/VM/JIT (no segfault; re-run binary ≥3×) - Compliance or AOT fixture guard; php-src-strict
Activity
PurHur commentedon Aug 3, 2026
claim: PHP Compiler STD Lib Advanced — batch (issues #27307, #27308, #27309, #27262)
ext/date AOT regressions: DateTimeZone::getName/getOffset, DateTime::diff, DateTimeImmutable::modify(+1 month). Sequential PRs; starting with #27307.
Stdlib: AOT DateTime::diff()->days via compile-time DateInterval (#27309
Docs: sync bootstrap inventory/profile after DateTime::diff rebase (#…
Stdlib: AOT DateTime::diff()->days via compile-time DateInterval (#27309
PurHur commentedon Aug 3, 2026
Merged in #27339
Verification (docker-exec):
DateTime('2024-01-01')->diff(DateTime('2024-01-10'))->days→9(×3)vendor/bin/phpunit --filter datetime_diff_days test/aot/AotTest.php→ OKnew DateInterval('P9D')still builds; inventory/spine OKBatch status: #27307, #27308, #27309 merged. Next: #27262 DateTimeImmutable::modify(+1 month).