Bug 313041 – [GTK] inspector/debugger/async-stack-trace-truncate.html is a flaky test (crashes)

• Status: RESOLVED
• Resolution: WONTFIX
• Component: WPE WebKit

[Nikolas Zimmermann]

wktesthunter output for this flaky test across affected bots:

>>> gtk-release <<<
311760@main                   UNKNOWN
311761@main                   NOERROR
311762@main                   UNKNOWN
311763@main                   NOERROR
[311764@main-311766@main]     UNKNOWN
311767@main                   NOERROR
[311768@main-311769@main]     UNKNOWN
311770@main                   NOERROR
[311771@main-311773@main]     UNKNOWN
311774@main                   CRASH (Expected: PASS)
[311775@main-311782@main]     UNKNOWN
311783@main                   CRASH (Expected: PASS)
[311784@main-311791@main]     UNKNOWN
311792@main                   CRASH (Expected: PASS)


The bot gtk-release completed 1255 runs on the interval [307792@main-311792@main]
Frequency of results for test: inspector/debugger/async-stack-trace-truncate.html
  1242 times [99.0%]     ->  NOERROR
  12 times [1.0%]        ->  CRASH
  1 times [0.1%]         ->  TIMEOUT PASS

Of those 1255 runs it didn't match the expectation 13 times [1.0%]
Details of the type and frequency of unmatched expectations:
  12 times [1.0%]        ->  CRASH (Expected: PASS)
  1 times [0.1%]         ->  TIMEOUT PASS (Expected: PASS)

Flakiness factor: 1.5%
    - This test was flaky on 1.5% of the 1255 runs analyzed, either giving different
      results within a single run, or a different result than in the previous run.

[Fujii Hironori]

History: https://results.webkit.org/?suite=layout-tests&test=inspector%2Fdebugger%2Fasync-stack-trace-truncate.html

https://build.webkit.org/results/GTK-Linux-64-bit-Release-Tests/311809@main%20(24736)/inspector/debugger/async-stack-trace-truncate-crash-log.txt

Thread 1 (Thread 0x7f153018fec0 (LWP 1233152)):
#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#1  __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#3  0x00007f153d63327e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0x00007f153d6168ff in __GI_abort () at ./stdlib/abort.c:79
#5  0x00007f153c24c075 in g_assertion_message (domain=domain@entry=0x7f153c2e900e "GLib", file=file@entry=0x7f153c2f0330 "../../../../../jhbuild/checkout/glib/glib/gmain.c", line=line@entry=4049, func=func@entry=0x7f153c2fd030 <__func__.21> "g_main_context_check_unlocked", message=message@entry=0x5633caf7a580 "assertion failed: (i <= 0 || fds[i - 1].fd < fds[i].fd)") at ../../../../../jhbuild/checkout/glib/glib/gtestutils.c:3387
#6  0x00007f153c2b5a3e in g_assertion_message_expr (domain=domain@entry=0x7f153c2e900e "GLib", file=file@entry=0x7f153c2f0330 "../../../../../jhbuild/checkout/glib/glib/gmain.c", line=line@entry=4049, func=func@entry=0x7f153c2fd030 <__func__.21> "g_main_context_check_unlocked", expr=expr@entry=0x7f153c2f0990 "i <= 0 || fds[i - 1].fd < fds[i].fd") at ../../../../../jhbuild/checkout/glib/glib/gtestutils.c:3413
#7  0x00007f153c2884c8 in g_main_context_check_unlocked (context=context@entry=0x5633c750be50, max_priority=max_priority@entry=2147483647, fds=fds@entry=0x7f1524018238, n_fds=n_fds@entry=5) at ../../../../../jhbuild/checkout/glib/glib/gmain.c:4049
#8  0x00007f153c28969e in g_main_context_check (context=0x5633c750be50, max_priority=2147483647, fds=0x7f1524018238, n_fds=5) at ../../../../../jhbuild/checkout/glib/glib/gmain.c:3986
#9  0x00007f153bea6595 in WTF::RunLoop::runGLibMainLoopIteration(WTF::RunLoop::MayBlock) () from /sdk/webkit/WebKitBuild/GTK/Release/lib/libjavascriptcoregtk-6.0.so.1
#10 0x00007f153bea6882 in WTF::RunLoop::run() () from /sdk/webkit/WebKitBuild/GTK/Release/lib/libjavascriptcoregtk-6.0.so.1
#11 0x00007f1540572dd6 in int WebKit::AuxiliaryProcessMain<WebKit::WebProcessMainGtk>(int, char**) () from /sdk/webkit/WebKitBuild/GTK/Release/lib/libwebkitgtk-6.0.so.4
#12 0x00007f153d6181ca in __libc_start_call_main (main=main@entry=0x5633a4c3c7d0 <main>, argc=argc@entry=4, argv=argv@entry=0x7ffdd7ca3f48) at ../sysdeps/nptl/libc_start_call_main.h:58
#13 0x00007f153d61828b in __libc_start_main_impl (main=0x5633a4c3c7d0 <main>, argc=4, argv=0x7ffdd7ca3f48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdd7ca3f38) at ../csu/libc-start.c:360
#14 0x00005633a4c3c705 in _start ()

https://build.webkit.org/results/GTK-Linux-64-bit-Release-Tests/311809@main%20(24736)/inspector/debugger/async-stack-trace-truncate-stderr.txt

VM 0x7f1526400000 on pid 1233152 received NeedDebuggerBreak trap
**
GLib:ERROR:../../../../../jhbuild/checkout/glib/glib/gmain.c:4049:g_main_context_check_unlocked: assertion failed: (i <= 0 || fds[i - 1].fd < fds[i].fd)
WebKitWebProcess terminated (pid 1233152) for reason: crash

[Fujii Hironori]

*** This bug has been marked as a duplicate of bug 312888 ***

[Nikolas Zimmermann]

Closing: flakiness factor was below the 5% threshold; the TestExpectations entry has been removed in webkit.org/b/313122 (PR https://github.com/WebKit/WebKit/pull/63415).