Regression: ResourceBundle::create() missing bundle returns object — Zend NULL + U_MISSING_RESOURCE_ERROR (ext/intl/resourcebundle)

[PurHur]

Category

bug · php-src-strict · ResourceBundle construct failure

Problem

When the ICU bundle/locale cannot be loaded and $fallback is false, Zend returns null and sets intl_get_error_code() to U_MISSING_RESOURCE_ERROR (2). VM returns an empty ResourceBundle object with intl_get_error_code()===0. Distinct from #22854 (fallback locale U_USING_DEFAULT_WARNING).

Repro (ResourceBundle::create($loc, $bundle, false))	Zend 8.2+	VM (2026-07-24)
xx_YY / ICUDATA-zone	NULL, err=2 (U_MISSING_RESOURCE_ERROR)	ResourceBundle object, err=0
zz_ZZ / ICUDATA	NULL, err=2	object, err=0
en / no_such_bundle_xyz	NULL, err=2	non-object / inconsistent

php-src reference

• php/php-src ext/intl/resourcebundle/resourcebundle_class.c — resourcebundle_ctor failure → NULL + intl error
• ICU ures_open / U_MISSING_RESOURCE_ERROR

PHP implementation target

• ext/intl/ ResourceBundle create path (VmResourceBundle / construct helper) — on open failure with $fallback=false, return null, set intl error code/message like Zend; do not publish empty object
• PHP-in-PHP; no new C

Repro

./script/docker-exec.sh -- bash -lc 'cat >/tmp/rb_missing.php <<'"'"'PHP'"'"'
<?php
$r = @ResourceBundle::create("xx_YY", "ICUDATA-zone", false);
echo $r === null ? "NULL" : ("OBJ:".get_class($r));
echo " err=", intl_get_error_code(), " msg=", intl_get_error_message(), "\n";
PHP
php /tmp/rb_missing.php
php bin/vm.php /tmp/rb_missing.php'

Done when

• Missing bundle/locale + $fallback=false → null + U_MISSING_RESOURCE_ERROR (msg contains resourcebundle_ctor / missing resource)
• Successful opens unchanged; Regression: ResourceBundle::create() fallback locale skips U_USING_DEFAULT_WARNING (-127) (ext/intl/resourcebundle) #22854 fallback warning still separate
• Compliance .phpt; php-src-strict

[PurHur]

Trust probe (before claim)

Gate	Status	Note
bootstrap-inventory --check	green	OK 6517/6517
release-readiness --json	partial	user_release_ready: no
spine-coverage	red on master	missing lib/Compiler/ClassConstVisibilityInheritCheck.php (self-host; not this issue)
north-star5-fast	red on master	follows spine sync (#2543)
vm-driver-probe	green

claim: PHP Compiler Ext — I/O & Crypto — starting this run (#22902 ResourceBundle missing → NULL + U_MISSING_RESOURCE_ERROR)

[PurHur]

Unclaim / blocker: Docker php-compiler:22.04-dev has extension_loaded('intl')===false (no php-intl). Per IntlExtensionPolicy::advertisesExtension(), ResourceBundle is withheld — cannot reproduce or verify #22902 against Zend/VM in this harness without installing php-intl. Leaving for an env with host intl, or after image gains php-intl.