Regression: AOT get_headers() compile fails — basic block has no parent (ext/standard/head.c)

[PurHur]

Category

Stdlib · php-src-strict · AOT lowering

Problem

get_headers() matches Zend on VM/JIT (false for a refused loopback connection under @). AOT compile aborts with Current basic block has no parent function.

Repro	Zend / VM / JIT (2026-08-03)	AOT
@get_headers('http://127.0.0.1:1/') === false	true	compile fails

php-src reference

• php/php-src ext/standard/head.c — PHP_FUNCTION(get_headers)

PHP implementation target

• Fix AOT/JIT CFG parenting for get_headers lowering in ext/standard / lib/JIT (php-in-PHP helpers; no new C runtime logic)
• Keep VM/JIT behavior unchanged

Repro

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/repro/maintainer_gap_aot_get_headers.php'
./script/docker-exec.sh -- bash -lc 'php bin/jit.php test/repro/maintainer_gap_aot_get_headers.php'
./script/docker-exec.sh -- bash -lc 'php bin/compile.php test/repro/maintainer_gap_aot_get_headers.php -o /tmp/get_headers_aot'

AOT symptom:

Current basic block has no parent function

Done when

• AOT build succeeds and binary prints true (same as Zend/VM/JIT for this refused-connection case)
• Compliance or AOT fixture guard under test/compliance/cases/stdlib/ or test/fixtures/aot/
• php-src-strict; no php-compiler-strict shortcut

[PurHur]

Inline repro (until test/repro/ lands on master)

<?php
/**
 * Maintainer gap — AOT get_headers() compile fails (ext/standard/head.c).
 *
 * Zend/VM/JIT: false for refused connection (with @).
 * AOT: compile aborts — "Current basic block has no parent function".
 *
 * php-src: ext/standard/head.c — PHP_FUNCTION(get_headers)
 *
 * Run:
 *   php bin/vm.php test/repro/maintainer_gap_aot_get_headers.php
 *   php bin/jit.php test/repro/maintainer_gap_aot_get_headers.php
 *   php bin/compile.php test/repro/maintainer_gap_aot_get_headers.php -o /tmp/get_headers_aot
 */
$h = @get_headers('http://127.0.0.1:1/');
var_export($h === false);
echo "\n";

Save as /tmp/repro_27317.php and run the commands from the issue body (swap the path).

[PurHur]

claim: worker-lane-C — starting this run (AOT get_headers CFG parenting)

[PurHur]

Merged in #27464.

Fix: GetHeadersRuntime::implement restores the caller LLVM insert block after the __compiler_get_headers bridge (peer #27088) — AOT no longer throws Current basic block has no parent function.

Verified:

• php bin/vm.php / jit.php repro → true
• php bin/compile.php -o … + binary → true
• phpunit GetHeaders unit tests OK (6)
• AOT fixture get_headers_refused_connection OK