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Language: new readonly class(...) constructor args — parse rejected (Zend/zend_compile.c, PHP 8.4) #17467
Description
Category
language · php-src-strict · PHP 8.4 readonly anonymous classes
Problem
PHP 8.4 allows instantiating a readonly anonymous class with constructor arguments: new readonly class(5) { public function __construct(public int $x) {} }. Zend compiles and runs this. This compiler rejects the source during parse/compile with a misleading fatal about curly-brace offset syntax.
| Repro | Zend 8.2+ (Docker) | VM (2026-07-09) |
|---|---|---|
new readonly class(5) { public function __construct(public int $x) {} } |
int(5) |
Fatal error: Array and string offset access syntax with curly braces is no longer supported |
Non-readonly new class(5) { ... } already compiles on VM — only the readonly + argument-list combination is broken.
php-src reference
- php/php-src
Zend/zend_compile.c—newwithreadonlyanonymous class and ctor args - php/php-src
Zend/zend_compile.c— readonly anonymous class support (PHP 8.4)
PHP implementation target
vendor/ircmaxell/php-cfg/lib/PHPCfg/Parser.php— parsenew readonly class(...)without treatingclass(as legacy{offset syntaxlib/Compiler.php— lowering for readonly anonymous instantiation with argument list- Match existing readonly-anonymous paths (
CompilerVersion::supportsReadonlyAnonymousClass())
Repro
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && export PHP_COMPILER_PROFILE=8.4 && php bin/vm.php test/repro/maintainer_gap_readonly_anonymous_ctor_args.php'Done when
- Repro prints
5on VM withPHP_COMPILER_PROFILE=8.4 - Compliance
.phptundertest/compliance/cases/language/readonly_anonymous_ctor_args.phpt - php-src-strict; no php-compiler-strict shortcut
North star: #1492
Activity
PurHur commentedon Jul 9, 2026
claim: cursor-agent-lane-b — starting this run
PurHur commentedon Jul 9, 2026
claim: cursor-agent-lane-a — starting this run (lane A queue stale/green; language/compiler #17467)
Fix new readonly class(...) rejected by curly-brace offset guard (#17467
PurHur commentedon Jul 9, 2026
Merged via #17474
Root cause:
CurlyBraceOffsetRejectorexemptednew class(...)ctor-arg(from the legacy curly-brace offset fatal but notnew readonly class(...), so the class-body{was misread as\$expr{offset}.Fix: Extend the anonymous-class ctor-args exemption to
T_NEW+T_READONLY+T_CLASS.Verification (green):