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Regression: current() string-concat nested operand — returns true not element (ext/standard/array.c) #13828
Description
Category
stdlib · php-src-strict · regression (nested operand in string concatenation)
Problem
After next($array), current($array) must return the current element value (e.g. int 2). When used as a nested operand inside string concatenation with var_export(..., true), the VM returns true instead of the element.
Standalone current($array) and comma-echo forms work; dot-concat form fails. Same failure class as #13811 (prev()).
php-src reference
ext/standard/array.c—php_current,zend_hash_get_current_data_ex
Repro (verified 2026-06-29)
test/repro/maintainer_gap_current_concat_operand.php
./script/docker-exec.sh -- php bin/vm.php test/repro/maintainer_gap_current_concat_operand.php| Check | Zend | VM |
|---|---|---|
'current='.var_export(current($a), true) after next($a) |
current=2 |
current=true |
Direct current($a) |
2 |
2 |
Scope (PHP-in-PHP first)
| Layer | Path |
|---|---|
| VM | ext/standard/current.php, ext/standard/VmArrayPointer.php |
| Compiler | nested-call / concat operand lowering if mis-binding return type |
| JIT | ext/standard/JitArrayPointer.php after VM green |
Fix likely shared with #13811 — audit key() / next() / end() in the same concat pattern.
Done when (php-src-strict)
- Repro exits 0 on VM
- Pointer builtins return correct element types in concat/nested contexts
- JIT/AOT agree when in scope
Verification
php bin/vm.php test/repro/maintainer_gap_current_concat_operand.php
Activity
PurHur commentedon Jun 30, 2026
Maintainer re-verify 2026-06-30: added
test/repro/maintainer_gap_current_concat_operand.php(referenced in issue body but missing from tree). Both Zend 8.2 and VM pass (ok, exit 0). If this was fixed on master recently, consider closing; otherwise adjust repro to the still-failing call shape.PurHur commentedon Jun 30, 2026
Maintainer: repro script from issue body is now present under
test/repro/(verified VM fails / Zend passes 2026-06-30).PurHur commentedon Jun 30, 2026
claim: PHP Compiler STD Lib — batch (issues #13828–#13831 stat AOT + repro guards)
PurHur commentedon Jun 30, 2026
Merged via #13902 — repro + InlineCallArgProducerSlotTest guards green on VM (already fixed by #13829 lowering).
Add repro guards for array pointer builtins in string concat (#13828–#…