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SIGABRT in zend_compile_func_array_map() (zend_compile.c:5072) with Assertion 0 && "not implemented" #20991
Description
Description
The following code:
<?php
function foo(string $key): string {
throw new \Exception('Test');
}
array_filter(
array_combine(
['a'],
array_map(j::foo(...),['a']),
ay_combine(
['a'],
array_map(j::foo( ['a'],
array_map(j::foo(...),['a']),
ay_combine(
['a'],
array_map(j::foo(...),['a']),
),
...),['a']),
),
),
);
?>Resulted in this output:
Running LLVMFuzzerInitialize ...
continue...
Reading 375 bytes from poc_4
php-fuzz-parser: /home/unimelb.edu.au/wenqiyan/fuzzingdynamiq/subjects/testphp/php-src/Zend/zend_compile.c:5072: zend_result zend_compile_func_array_map(znode *, zend_ast_list *, zend_string *, uint32_t): Assertion `0 && "not implemented"' failed.
Aborted
This reproduces with php-fuzz-parser (fuzzing harness).
PHP Version
PHP 8.6.0-dev
Operating System
No response
Activity
iluuu1994 commentedon Jan 21, 2026
Looks related to GH-20934. /cc @TimWolla
zend_compile: Fix handling of PFA syntax in array_map() optimization
zend_compile: Fix array_map() optimization (php#21016)