1885422 - Assertion failure: aOffset == 0 || aSeekable (channel offset must be zero when we become non-seekable), at /builds/worker/checkouts/gecko/dom/media/MediaCache.cpp:1953

Status: NEW

(Core :: Audio/Video: Playback, defect)

Description

[Tyson Smith [:tsmith]]

Found with m-c 20240131-ad50a175a7c5 (--enable-debug --enable-fuzzing)

This was found by visiting a live website with a debug build.

STR:

• Launch browser and visit site

This issue was triggered by visiting http://general.fund/.

Assertion failure: aOffset == 0 || aSeekable (channel offset must be zero when we become non-seekable), at /builds/worker/checkouts/gecko/dom/media/MediaCache.cpp:1953

#0 0x7f0b7e06ee1a in mozilla::MediaCacheStream::NotifyDataStartedInternal(unsigned int, long, bool, long) /builds/worker/checkouts/gecko/dom/media/MediaCache.cpp:1952:3
#1 0x7f0b7e137817 in operator() /builds/worker/checkouts/gecko/dom/media/MediaCache.cpp:1978:9
#2 0x7f0b7e137817 in mozilla::detail::RunnableFunction<mozilla::MediaCacheStream::NotifyDataStarted(unsigned int, long, bool, long)::$_0>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:548:5
#3 0x7f0b7a3fb451 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1193:16
#4 0x7f0b7a40242d in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:480:10
#5 0x7f0b7b0eb005 in mozilla::ipc::MessagePumpForNonMainThreads::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:330:5
#6 0x7f0b7b000151 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:363:3
#7 0x7f0b7b000151 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:345:3
#8 0x7f0b7a3f6723 in nsThread::ThreadFunc(void*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:370:10
#9 0x7f0b8e75566f in _pt_root /builds/worker/checkouts/gecko/nsprpub/pr/src/pthreads/ptthread.c:201:5
#10 0x7f0b8efffac2 in start_thread nptl/pthread_create.c:442:8
#11 0x7f0b8f090a03 in __clone misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:100

Comment 1

[Tyson Smith [:tsmith]]

A Pernosco session is available here: https://pernos.co/debug/q7QNSDWg9oFw-NoYO8jHHQ/index.html

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jimm, could you have a look please?

For more information, please visit BugBot documentation.

Comment 3

[Paul Adenot (:padenot)]

There's no sources on the pernosco recording, is that something we should fix, or something we should tell pernosco?

Comment 4

[Tyson Smith [:tsmith]]

Sorry about that, took a while to reproduce again.

https://pernos.co/debug/ANTkMujdaCylEbGkoFUqNg/index.html