2 tests fail on Alpinelinux s390x

[andypost]

Description

Preparing a next release the rebuild required to upgrade to RC1 for new libxml but 2 tests fail using clang 18.1.8

The following failure #15168

TEST 8148/17152 [ext/json/tests/gh15168.phpt]
========DIFF========
     bool(false)
     int(1)
     string(28) "Maximum stack depth exceeded"
+ 
+ Termsig=0
========DONE========
�[1;31mFAIL�[0m GH-15168 (stack overflow in json_encode()) [ext/json/tests/gh15168.phpt] 

and another one #15169

TEST 15215/17151 [ext/standard/tests/serialize/gh15169.phpt]
========DIFF========
     Maximum call stack size reached. Infinite recursion?
�[1;32m002+ �[0m
�[1;32m003+ Termsig=0�[0m
========DONE========
�[1;31mFAIL�[0m GH-15169 (stack overflow when var serialization in ext/standard/var) [ext/standard/tests/serialize/gh15169.phpt] 

PHP Version

PHP 8.3.13RC1

Operating System

Alpinelinux

[iluuu1994]

@andypost Can you check if this SKIPIF solves the problem for you?

if (!function_exists('zend_test_zend_call_stack_get')) die("skip zend_test_zend_call_stack_get() is not available");

I'm assuming the other stack limit tests also get skipped? E.g. Zend/tests/stack_limit/stack_limit_001.phpt

[andypost]

I bet the function should exist as I do build zend_test module and other arches are passing tests

Moreover both tests passing in CI but fails on builder... so I'm lost a bit

[andypost]

@iluuu1994 you can see full log from CI - all tests are executed and passed

[andypost]

And here's a build log from builder

[iluuu1994]

@andypost These methods exist conditionally, namely when ZEND_CHECK_STACK_LIMIT is declared.

I can't see stack_limit_001.phpt in your output, so are you sure you are compiling with zend_test? I can see them in the second log, where the new tests are also passing.