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Regression: get_cfg_var('display_errors') — returns true not empty string (ext/standard/ini.c) #15916
Description
Activity
claim: PHP Runtime → PHP — starting this run
claim released: repro green on master — get_cfg_var('display_errors') returns string(0) "" matching Zend 8.2 in docker-exec.
claim: cursor-agent-lane-b — starting this run
Merged via #16112.
Root cause: In error-suppress exit blocks, hoisted
true/false/nullConstFetch ordinal matching stole the first dead temp call arg slot instead of the parent@innerFUNCCALL_EXEC_RETURN(e.g.var_export(@get_cfg_var('display_errors'), true)returnedtrue).Verification:
php bin/vm.php test/repro/maintainer_gap_get_cfg_var_display_errors.php # type=string val='' php bin/vm.php -r 'echo var_export(@get_cfg_var("display_errors"),true),"\n";' # '' vendor/bin/phpunit test/unit/ErrorSuppressInlineReturnSlotTest.php -q # OK
Category
Stdlib· php-src-strict · ini compile-time lookupProblem
get_cfg_var('display_errors')reads php.ini compile-time values. Zend returns an empty string when the directive is unset/off in the scanned ini; this compiler returns booleantrue.@get_cfg_var('display_errors')''truephp-src reference
ext/standard/ini.c—PHP_FUNCTION(get_cfg_var),cfg_get_stringPHP implementation target
ext/standard/get_cfg_var.phpand/orext/standard/VmIni.php— return ini string values with Zend coercion (not bool true for off directives)lib/JIT/Builtin/lowering ifget_cfg_varis compiledRepro
Done when
get_cfg_var('display_errors')matches Zend type/value in default Docker env.phptundertest/compliance/cases/stdlib/get_cfg_var_display_errors.phpt