Bug #79646 [Com]: Segmentation fault in garbage collector

Edit report at https://bugs.php.net/bug.php?id=79646&edit=1 ID: 79646 Comment by: enumag at gmail dot com Reported by: enumag at gmail dot com Summary: Segmentation fault in garbage collector Status: Open Type: Bug Package: Scripting Engine problem Operating System: Alpine PHP Version: 7.4.6 Block user comment: N Private report: N New Comment: Unfortunately the segfault persists even with PHP 7.4.7. What should I do now? Previous Comments: ------------------------------------------------------------------------ [2020-06-11 09:09:19] enumag at gmail dot com Okay, not only it always fail in the same test but also in the same spot while the test is executed. Also the spot is something with rather heavy usage of Generators so if bug #79600 can indeed cause it then this is most likely the reason. I'll wait for PHP 7.4.7 to see if the problem disappears or not. ------------------------------------------------------------------------ [2020-06-11 07:08:56] enumag at gmail dot com Considering the fact that the tests always failed at the same percentage of completion I do think it is always the same test - I was unable to pinpoint which one though. Is there a way to print test name for each test when it starts? --testdox seem to only print it when the test is finished. However gc_collect_cycles() didn't help in making the bug more reliable to happen. It's still completely random. ------------------------------------------------------------------------ [2020-06-08 20:19:29] alexinbeijing at gmail dot com I suggest you use setUp() and tearDown() to run gc_collect_cycles() before and after each test. See if that makes the segfault happen more reliably. Also print out the names of the tests as they run. See if it always segfaults on the same tests (or a few of them). That would be a huge clue pointing to what is actually wrong. ------------------------------------------------------------------------ [2020-05-28 09:01:20] enumag at gmail dot com @bwoebi I don't know. I'm using the php:7.4-alpine docker image. Is there one for 7.4.7RC1? If there is I can try but I won't be able to tell reliably if it got fixed since it only happens occasionally in the first place... Btw. bwoebi, really sorry for going off-topic here but there are number of issues with ext-uv and/or amphp where I kinda need your help. Any chance you might find some time for them in June 2020? ------------------------------------------------------------------------ [2020-05-28 08:46:32] bwoebi@php.net Is this possibly related to #79600? Can you please try with PHP 7.4.7RC1 whether the issue is still present there? ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=79646 -- Edit this bug report at https://bugs.php.net/bug.php?id=79646&edit=1