1899778 - Intermittent Assertion failure: !strncmp(header->mMagic, sMagic, sizeof(sMagic)) (invalid segment), at /builds/worker/checkouts/gecko/ipc/glue/Shmem.cpp:236

Status: REOPENED

(Core :: Graphics: Canvas2D, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: imoraru [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=460326015&repo=mozilla-esr115
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/Kly0cGAgTZ6FU201E4cO0Q/runs/0/artifacts/public/logs/live_backing.log

---

[task 2024-05-30T13:46:40.416Z] 13:46:40     INFO - TEST-START | devtools/client/performance-new/test/browser/browser_devtools-record-capture.js
[task 2024-05-30T13:46:40.491Z] 13:46:40     INFO - GECKO(5871) | [Child 5972: Main Thread]: I/DocShellAndDOMWindowLeak ++DOCSHELL 7f219a221c00 == 2 [pid = 5972] [id = 8]
[task 2024-05-30T13:46:40.492Z] 13:46:40     INFO - GECKO(5871) | [Child 5972: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 5 (7f219f4a9c30) [pid = 5972] [serial = 19] [outer = 0]
[task 2024-05-30T13:46:40.492Z] 13:46:40     INFO - GECKO(5871) | [Child 5972: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 6 (7f219a222000) [pid = 5972] [serial = 20] [outer = 7f219f4a9c30]
<...>
[task 2024-05-30T13:46:50.763Z] 13:46:50     INFO - GECKO(5871) | [Child 6327: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 2 (7f1afc42cc00) [pid = 6327] [serial = 2] [outer = 7f1b01563470]
[task 2024-05-30T13:46:51.061Z] 13:46:51     INFO - GECKO(5871) | [Child 6327: Main Thread]: I/DocShellAndDOMWindowLeak ++DOMWINDOW == 3 (7f1afc430000) [pid = 6327] [serial = 3] [outer = 7f1b01563470]
[task 2024-05-30T13:46:52.283Z] 13:46:52     INFO - GECKO(5871) | Assertion failure: !strncmp(header->mMagic, sMagic, sizeof(sMagic)) (invalid segment), at /builds/worker/checkouts/gecko/ipc/glue/Shmem.cpp:236
[task 2024-05-30T13:46:52.284Z] 13:46:52     INFO - GECKO(5871) | #01: mozilla::ipc::Shmem::Shmem(mozilla::ipc::SharedMemory*, int) [ipc/glue/Shmem.cpp:235]
[task 2024-05-30T13:46:52.286Z] 13:46:52     INFO - GECKO(5871) | #02: mozilla::ipc::IPDLParamTraits<mozilla::ipc::Shmem>::Read(IPC::MessageReader*, mozilla::ipc::IProtocol*, mozilla::ipc::Shmem*) [ipc/glue/Shmem.cpp:450]
[task 2024-05-30T13:46:52.288Z] 13:46:52     INFO - GECKO(5871) | #03: IPC::ParamTraits<mozilla::IPCProfileAndAdditionalInformation>::Read(IPC::MessageReader*) [s3:gecko-generated-sources:dab2818a3a8482612be30b18949cde43a6cc795caa5be4cc0eedba61656ace6eb178c2543d4651d8b68db3bc358526333d06595f867d03cfc16a66bba626dd8c/ipc/ipdl/ProfilerTypes.cpp::325]
[task 2024-05-30T13:46:52.290Z] 13:46:52     INFO - GECKO(5871) | #04: mozilla::PProfilerParent::OnMessageReceived(IPC::Message const&) [s3:gecko-generated-sources:f4fc7889e525d56f6e27e002b22c7e0c8cb521585179ab5da070861d0b5070bffa72e14f9e0c1440957daeef49b7c41ab1fcb75d7cb9d48915be17d115f31d30/ipc/ipdl/PProfilerParent.cpp::1137]
[task 2024-05-30T13:46:52.292Z] 13:46:52     INFO - GECKO(5871) | #05: mozilla::ipc::MessageChannel::DispatchAsyncMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message const&) [ipc/glue/MessageChannel.cpp:1811]
[task 2024-05-30T13:46:52.293Z] 13:46:52     INFO - GECKO(5871) | #06: mozilla::ipc::MessageChannel::DispatchMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::UniquePtr<IPC::Message, mozilla::DefaultDelete<IPC::Message> >) [ipc/glue/MessageChannel.cpp:1739]
[task 2024-05-30T13:46:52.296Z] 13:46:52     INFO - GECKO(5871) | #07: mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::ipc::MessageChannel::MessageTask&) [ipc/glue/MessageChannel.cpp:1536]
[task 2024-05-30T13:46:52.296Z] 13:46:52     INFO - GECKO(5871) | #08: mozilla::ipc::MessageChannel::MessageTask::Run() [ipc/glue/MessageChannel.cpp:1643]
[task 2024-05-30T13:46:52.297Z] 13:46:52     INFO - GECKO(5871) | #09: mozilla::RunnableTask::Run() [xpcom/threads/TaskController.cpp:556]
[task 2024-05-30T13:46:52.298Z] 13:46:52     INFO - GECKO(5871) | #10: mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) [xpcom/threads/TaskController.cpp:879]
[task 2024-05-30T13:46:52.299Z] 13:46:52     INFO - GECKO(5871) | #11: mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) [xpcom/threads/TaskController.cpp:0]
[task 2024-05-30T13:46:52.300Z] 13:46:52     INFO - GECKO(5871) | #12: mozilla::TaskController::ProcessPendingMTTask(bool) [xpcom/threads/TaskController.cpp:491]
[task 2024-05-30T13:46:52.300Z] 13:46:52     INFO - GECKO(5871) | #13: mozilla::detail::RunnableFunction<mozilla::TaskController::TaskController()::$_0>::Run() [xpcom/threads/nsThreadUtils.h:549]
[task 2024-05-30T13:46:52.301Z] 13:46:52     INFO - GECKO(5871) | #14: nsThread::ProcessNextEvent(bool, bool*) [xpcom/threads/nsThread.cpp:1244]
[task 2024-05-30T13:46:52.303Z] 13:46:52     INFO - GECKO(5871) | #15: NS_ProcessNextEvent(nsIThread*, bool) [xpcom/threads/nsThreadUtils.cpp:479]
[task 2024-05-30T13:46:52.303Z] 13:46:52     INFO - GECKO(5871) | #16: mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) [ipc/glue/MessagePump.cpp:85]
[task 2024-05-30T13:46:52.303Z] 13:46:52     INFO - GECKO(5871) | #17: MessageLoop::Run() [ipc/chromium/src/base/message_loop.cc:344]
[task 2024-05-30T13:46:52.304Z] 13:46:52     INFO - GECKO(5871) | #18: nsBaseAppShell::Run() [widget/nsBaseAppShell.cpp:150]
[task 2024-05-30T13:46:52.304Z] 13:46:52     INFO - GECKO(5871) | #19: nsAppStartup::Run() [toolkit/components/startup/nsAppStartup.cpp:296]
[task 2024-05-30T13:46:52.304Z] 13:46:52     INFO - GECKO(5871) | #20: XREMain::XRE_mainRun() [toolkit/xre/nsAppRunner.cpp:5651]
[task 2024-05-30T13:46:52.305Z] 13:46:52     INFO - GECKO(5871) | #21: XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) [toolkit/xre/nsAppRunner.cpp:5851]
[task 2024-05-30T13:46:52.305Z] 13:46:52     INFO - GECKO(5871) | #22: XRE_main(int, char**, mozilla::BootstrapConfig const&) [toolkit/xre/nsAppRunner.cpp:5907]
[task 2024-05-30T13:46:52.305Z] 13:46:52     INFO - GECKO(5871) | #23: ??? [/builds/worker/workspace/build/application/firefox/firefox + 0x3ef28]
[task 2024-05-30T13:46:52.373Z] 13:46:52     INFO - GECKO(5871) | #24: __libc_start_main [/lib/x86_64-linux-gnu/libc.so.6 + 0x21b97]
[task 2024-05-30T13:46:52.374Z] 13:46:52     INFO - GECKO(5871) | #25: ??? [/builds/worker/workspace/build/application/firefox/firefox + 0x3eac9]
[task 2024-05-30T13:46:52.375Z] 13:46:52     INFO - GECKO(5871) | #26: ??? (???:???)
[task 2024-05-30T13:46:52.376Z] 13:46:52     INFO - GECKO(5871) | ExceptionHandler::GenerateDump cloned child 6523
[task 2024-05-30T13:46:52.377Z] 13:46:52     INFO - GECKO(5871) | ExceptionHandler::SendContinueSignalToChild sent continue signal to child
[task 2024-05-30T13:46:52.379Z] 13:46:52     INFO - GECKO(5871) | ExceptionHandler::WaitForContinueSignal waiting for continue signal...
[task 2024-05-30T13:46:52.502Z] 13:46:52     INFO - GECKO(5871) | [Child 6062, IPC I/O Child] WARNING: [235F4887E15D6BE6.F5FBFE4C92D504DE]: Ignoring message 'EVENT_MESSAGE' to peer 1.1 due to a missing broker: file /builds/worker/checkouts/gecko/ipc/glue/NodeController.cpp:352

Comment 1

[Intermittent Failures Robot]

1 failures in 4202 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-05-27&endday=2024-06-02&tree=all

Comment 2

[Intermittent Failures Robot]

3 failures in 4577 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 3

Platform and build breakdown:

• linux1804-64-qr: 3
  • debug: 3

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-06-17&endday=2024-06-23&tree=all

Comment 3

[Intermittent Failures Robot]

2 failures in 3199 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 2

Platform and build breakdown:

• linux1804-64-qr: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-07-01&endday=2024-07-07&tree=all

Comment 4

[Intermittent Failures Robot]

1 failures in 3799 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-07-15&endday=2024-07-21&tree=all

Comment 5

[Intermittent Failures Robot]

1 failures in 4124 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-07-22&endday=2024-07-28&tree=all

Comment 6

[Intermittent Failures Robot]

2 failures in 3839 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 2

Platform and build breakdown:

• linux1804-64-qr: 2
  • debug: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-07-29&endday=2024-08-04&tree=all

Comment 7

[Intermittent Failures Robot]

1 failures in 2154 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-08-12&endday=2024-08-18&tree=all

Comment 8

[Intermittent Failures Robot]

1 failures in 3218 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-08-19&endday=2024-08-25&tree=all

Comment 9

[Intermittent Failures Robot]

1 failures in 3668 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2024-09-02&endday=2024-09-08&tree=all

Comment 10

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 11

[Treeherder Bug Filer]

New failure instance: https://treeherder.mozilla.org/logviewer?job_id=491095044&repo=mozilla-esr115

Comment 12

[Intermittent Failures Robot]

Summary

1 failures in 4035 pushes (0.0 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Platform and build breakdown:

• linux1804-64-qr: 1
  • debug: 1

Table

	no_variant
linux1804-64-qr--/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2025-01-20&endday=2025-01-26&tree=all

Comment 13

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 14

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Table

	no_variant
linux1804-64-qr--/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2025-04-07&endday=2025-04-13&tree=all

Comment 15

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Table

	no_variant
linux1804-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-03-30&endday=2026-04-05&tree=all

Comment 16

[Treeherder Bug Filer]

New failure instance: https://treeherder.mozilla.org/logviewer?job_id=558616000&repo=mozilla-esr115

Comment 17

[Intermittent Failures Robot]

9 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 9

Table

	no_variant
linux1804-x86_64/debug	9

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-04-08&endday=2026-04-14&tree=all

Comment 18

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 3

Table

	no_variant
linux1804-x86_64/debug	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-04-13&endday=2026-04-19&tree=all

Comment 19

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 2

Table

	no_variant
linux1804-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-04-20&endday=2026-04-26&tree=all

Comment 20

[Intermittent Failures Robot]

5 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 5

Table

	no_variant
linux1804-x86_64/debug	3
windows11-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-04-27&endday=2026-05-03&tree=all

Comment 21

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 22

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Table

	no_variant
linux1804-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-07-06&endday=2026-07-12&tree=all

Comment 23

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Table

	no_variant
linux1804-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-07-27&endday=2026-08-02&tree=all

Comment 24

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 1

Table

	no_variant
linux1804-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-08-31&endday=2026-09-06&tree=all

Comment 25

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 2

Table

	no_variant
linux1804-x86_64/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-09-14&endday=2026-09-20&tree=all

Comment 26

[Treeherder Bug Filer]

New failure instance: https://treeherder.mozilla.org/logviewer?job_id=594419857&repo=mozilla-esr115

Comment 27

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr115: 3

Table

	no_variant
linux1804-x86_64/debug	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1899778&startday=2026-09-21&endday=2026-09-27&tree=all