I can only reproduce this on debug builds. thread '<unnamed>' panicked at 'attempt to subtract with overflow', /checkout/src/libcore/ops.rs:418 stack backtrace: 0: 0x7f66ff0fae03 - std::sys::imp::backtrace::tracing::imp::unwind_backtrace::hcab99e0793da62c7 at /checkout/src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:49 1: 0x7f66ff0f6126 - std::sys_common::backtrace::_print::hbfe5b0c7e79c0711 at /checkout/src/libstd/sys_common/backtrace.rs:71 2: 0x7f66ff10849a - std::panicking::default_hook::{{closure}}::h9ba2c6973907a2be at /checkout/src/libstd/sys_common/backtrace.rs:60 at /checkout/src/libstd/panicking.rs:355 3: 0x7f66ff10809b - std::panicking::default_hook::he4d55e2dd21c3cca at /checkout/src/libstd/panicking.rs:371 4: 0x7f66ff1088ab - std::panicking::rust_panic_with_hook::ha138c05cd33ad44d at /checkout/src/libstd/panicking.rs:549 5: 0x7f66ff108784 - std::panicking::begin_panic::hcdbfa35c94142fa2 at /checkout/src/libstd/panicking.rs:511 6: 0x7f66ff1086b9 - std::panicking::begin_panic_fmt::hc09fe500d9b7be81 at /checkout/src/libstd/panicking.rs:495 7: 0x7f66ff108647 - rust_begin_unwind at /checkout/src/libstd/panicking.rs:471 8: 0x7f66ff11d9ed - core::panicking::panic_fmt::h883a028e9f4b4457 at /checkout/src/libcore/panicking.rs:69 9: 0x7f66ff11d924 - core::panicking::panic::hdb3cf3207dda37bb at /checkout/src/libcore/panicking.rs:49 10: 0x7f66fe8bd5e7 - <u32 as core::ops::Sub>::sub::h455839d6e786c203 at /checkout/src/libcore/ops.rs:418 11: 0x7f66fe8c77d5 - mp4parse_capi::create_sample_table::h92f09543e5d20cc9 at /home/worker/workspace/build/src/media/libstagefright/binding/mp4parse_capi/src/lib.rs:919 12: 0x7f66fe8c70e2 - mp4parse_get_indice_table at /home/worker/workspace/build/src/media/libstagefright/binding/mp4parse_capi/src/lib.rs:701 13: 0x7f66f471ea2c - _ZN11mp4_demuxer15MP4MetadataRust15ReadTrackIndiceEP18mp4parse_byte_datai at /home/worker/workspace/build/src/media/libstagefright/binding/MP4Metadata.cpp:1008 14: 0x7f66f471da6f - _ZN11mp4_demuxer11MP4Metadata14GetTrackIndiceEi at /home/worker/workspace/build/src/media/libstagefright/binding/MP4Metadata.cpp:433 15: 0x7f66f9215ab2 - _ZN7mozilla10MP4Demuxer4InitEv at /home/worker/workspace/build/src/dom/media/fmp4/MP4Demuxer.cpp:247 16: 0x7f66f8ce7e35 - _ZZN7mozilla17MediaFormatReader12DemuxerProxy4InitEvENK4$_10clEv at /home/worker/workspace/build/src/dom/media/MediaFormatReader.cpp:1027 17: 0x7f66f8ce7ae6 - _ZN7mozilla6detail21ProxyFunctionRunnableIZNS_17MediaFormatReader12DemuxerProxy4InitEvE4$_10NS_10MozPromiseINS_11MediaResultES6_Lb1EEEE3RunEv at /home/worker/workspace/build/src/obj-firefox/dist/include/mozilla/MozPromise.h:1510 18: 0x7f66f4948835 - _ZN7mozilla9TaskQueue6Runner3RunEv at /home/worker/workspace/build/src/xpcom/threads/TaskQueue.cpp:246 19: 0x7f66f49849fe - _ZN12nsThreadPool3RunEv at /home/worker/workspace/build/src/xpcom/threads/nsThreadPool.cpp:225 20: 0x7f66f4984e7c - _ZThn16_N12nsThreadPool3RunEv at /home/worker/workspace/build/src/xpcom/threads/nsThreadPool.cpp:154 21: 0x7f66f497c550 - _ZN8nsThread16ProcessNextEventEbPb at /home/worker/workspace/build/src/xpcom/threads/nsThread.cpp:1446 22: 0x7f66f4982190 - _Z19NS_ProcessNextEventP9nsIThreadb at /home/worker/workspace/build/src/xpcom/threads/nsThreadUtils.cpp:480 23: 0x7f66f54e7d34 - _ZN7mozilla3ipc28MessagePumpForNonMainThreads3RunEPN4base11MessagePump8DelegateE at /home/worker/workspace/build/src/ipc/glue/MessagePump.cpp:339 24: 0x7f66f5437c87 - _ZN11MessageLoop11RunInternalEv at /home/worker/workspace/build/src/ipc/chromium/src/base/message_loop.cc:326 25: 0x7f66f5437b19 - _ZN11MessageLoop3RunEv at /home/worker/workspace/build/src/ipc/chromium/src/base/message_loop.cc:299 26: 0x7f66f49746bb - _ZN8nsThread10ThreadFuncEPv at /home/worker/workspace/build/src/xpcom/threads/nsThread.cpp:506 27: 0x7f6710e745ed - _pt_root at /home/worker/workspace/build/src/nsprpub/pr/src/pthreads/ptthread.c:216 28: 0x7f67148026b9 - start_thread 29: 0x7f671388b3dc - clone 30: 0x0 - <unknown>

Mass change P1->P2 to align with new Mozilla triage process

Parser already updated at bug 1401071.

Comment on attachment 8912489 [details] Bug 1389527 - add testcase for invalid sample table. https://reviewboard.mozilla.org/r/183810/#review189008

Pushed by ayang@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/b979663a7f4f add testcase for invalid sample table. r=kinetik