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Regression: new Class()->method() accepted on 8.4.0-dev reference profile — Zend 8.2 parse error (re-#6974, Zend/zend_language_parser.y) #19684
Description
Category
language · php-src-strict · 8.4.0-dev reference profile gate
Problem
Dereferencable new without outer parentheses (new Greeter()->greet()) was implemented for PHP 8.4 (#6974), but the default 8.4.0-dev reference profile is supposed to match Zend 8.2 parse behavior for withheld 8.4 syntax (same pattern as typed class constants, asymmetric visibility, etc. in CompilerVersion).
On master today the construct parses and runs under the default profile while host Zend 8.2.31 parse-errors.
| Repro | Zend 8.2.31 | VM default 8.4.0-dev (2026-07-16) |
PHP_COMPILER_PROFILE=8.4 |
|---|---|---|---|
echo new A()->x(); |
Parse error on -> |
prints 1 ❌ |
prints 1 (OK for forward 8.4) |
php-src reference
- RFC: new_without_parentheses
- php/php-src
Zend/zend_language_parser.y— dereferencablenew(PHP 8.4+) - Profile precedent:
CompilerVersion::supportsNewWithoutParensInConstAndStaticInitializers()withheld on8.4.0-dev
PHP implementation target
lib/CompilerVersion.php— addsupportsDereferencableNewWithoutOuterParens()(true only for stable ≥8.4.0 or explicitPHP_COMPILER_PROFILE=8.4/ equivalent)- Parser / compile path that accepted Language: new MyClass()->method() — dereferencable new without outer parens missing (PHP 8.4, RFC new_without_parentheses) #6974 — reject with Zend-like parse/compile error when the gate is false
- Keep success path on forward 8.4 profile
- No
runtime/*.c
Repro
./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
cat > /tmp/newnp.php <<'"'"'PHP'"'"'
<?php
class A { public function x(){ return 1; } }
echo new A()->x(), "\n";
PHP
php /tmp/newnp.php; echo ZEND_EXIT:$?
php bin/vm.php /tmp/newnp.php; echo VM_EXIT:$?
PHP_COMPILER_PROFILE=8.4 php bin/vm.php /tmp/newnp.php'Done when
- Default
8.4.0-devprofile rejects the repro like Zend 8.2 -
PHP_COMPILER_PROFILE=8.4still accepts and runs - Unit/compliance guard for both profiles
- php-src-strict vs reference Zend; forward profile remains the 8.4 escape hatch
Activity
PurHur commentedon Jul 16, 2026
claim: Lane B implementer (Auto) — starting this run
Trust gates (before claim):
make bootstrap-selfhost-link: green (OK /compiler/build/selfhost)php script/bootstrap-inventory.php --check: red — stale docs/bootstrap-inventory.md (VmStreamSelect/VmPhpMemoryStream construct-flag drift only; not blocking this language fix)./script/release-readiness.sh --json: still running at claim timeImplementing profile gate for dereferencable
newwithout outer parens (#19684).Language: gate dereferencable new on 8.4 profile (#19684) (#19692)
PurHur commentedon Jul 16, 2026
Merged #19692
Verification
syntax error, unexpected token "->"…;PHP_COMPILER_PROFILE=8.4prints1exit 0new_dereferencable*: OK (4)--check+ VM driver probe: OKTrust gates (pre-claim)
make bootstrap-selfhost-link: green--check: was stale on master; regenerated with this PR’s rejector (now OK on branch)release-readiness --json: was still runningnorth-star5-verify --fastat claim time (not a blocker for this language gate)PurHur commentedon Jul 16, 2026
claim: lane-B compile/link worker — starting this run
PurHur commentedon Jul 16, 2026
Withdrawing claim — already merged via #19692 before this worker’s claim comment. Verified on master: default VM rejects with Zend-shaped parse error (exit 255);
PHP_COMPILER_PROFILE=8.4still runs.