1113498 - Useless stack trace in mochitest-other

Status: RESOLVED INVALID

(Tree Management :: Treeherder, defect)

Description

[Steve Fink [:sfink] [:s:]]

For example: https://treeherder.mozilla.org/ui/logviewer.html#?repo=fx-team&job_id=1474029

Or in brief:

19:45:35 INFO - Assertion failure: !phaseStartTimes[phase], at /builds/slave/fx-team-l64-d-0000000000000000/build/src/js/src/gc/Statistics.cpp:886
19:45:36 INFO - [2667] ###!!! ABORT: Aborting on channel error.: file /builds/slave/fx-team-l64-d-0000000000000000/build/src/ipc/glue/MessageChannel.cpp, line 1519
19:45:36 INFO - #01: mozilla::ipc::ProcessLink::OnChannelError() [ipc/glue/MessageLink.cpp:405]
19:45:36 INFO - #02: IPC::Channel::ChannelImpl::OnFileCanReadWithoutBlocking(int) [ipc/chromium/src/chrome/common/ipc_channel_posix.cc:854]
.
.
.

So the assertion is in js/src/gc/Statistics.cpp, but the stack trace in the log only shows mozilla::ipc::ProcessLink::OnChannelError(). This would be a pretty easy error to diagnose with a proper stack. But it's a rare intermittent, and tough to figure out without one.

I don't know if this bug belongs in IPC or breakpad or what.

Comment 1

[Steve Fink [:sfink] [:s:]]

...and I'm blind. The proper stack *is* in the log. If anything, this is a treeherder bug for only showing the useless stack in the summary pane of the log viewer.

Comment 2

[Ed Morley [:emorley]]

Could you give and expected vs actual? I'm not sure precisely what you are asking for here. It doesn't seem like this is a treeherder bug, but a log output bug, unless I'm misunderstanding (and unless we start making Treeherder mangle the log output, which is not something we've ever done before).

Comment 3

[Ed Morley [:emorley]]

s/and/an/

Comment 4

[Steve Fink [:sfink] [:s:]]

Doh! Actually, I missed it. The log viewer *does* pull out a PROCESS-CRASH line, which is all I needed. It's just cluttered up with a bunch of useless information like the IPC stack, but that's an IPC log output problem.