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Servo crashes visiting destroyallsoftware.com #27997

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teymour-aldridge opened this issue Dec 28, 2020 · 0 comments
Open

Servo crashes visiting destroyallsoftware.com #27997

teymour-aldridge opened this issue Dec 28, 2020 · 0 comments
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A-content/script Related to the script thread I-crash No impact; the issue is one of maintainability or tidiness. I-panic Servo encounters a panic.

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@teymour-aldridge
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There are a couple of backtraces.

56.868072:     0: backtrace::backtrace::libunwind::trace
56.868153:               at /Users/teymouraldridge/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.54/src/backtrace/libunwind.rs:90:5
56.868207:        backtrace::backtrace::trace_unsynchronized
56.868257:               at /Users/teymouraldridge/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.54/src/backtrace/mod.rs:66:5
56.868308:     1: <servo::backtrace::Print as core::fmt::Debug>::fmt
56.868358:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/backtrace.rs:49:13
56.868411:     2: core::fmt::write
56.868456:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libcore/fmt/mod.rs:1117:17
56.868501:     3: std::io::Write::write_fmt
56.868545:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/io/mod.rs:1508:15
56.868589:     4: servo::backtrace::print
56.868632:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/backtrace.rs:17:5
56.869866:     5: servo::main::{{closure}}
56.869956:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/main2.rs:166:21
56.870005:     6: std::panicking::rust_panic_with_hook
56.870051:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libstd/panicking.rs:530:17
56.870096:     7: rust_begin_unwind
56.870139:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libstd/panicking.rs:437:5
56.870182:     8: core::panicking::panic_fmt
56.870252:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libcore/panicking.rs:85:14
56.870300:     9: core::option::expect_none_failed
56.870346:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libcore/option.rs:1273:5
58.072423:    10: core::result::Result<T,E>::expect
58.072524:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/result.rs:963:23
58.341732:    11: script::dom::window::Window::force_reflow
58.341832:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/window.rs:1725:34
58.342164:    12: script::dom::window::Window::reflow
58.342229:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/window.rs:1813:29
58.629406:    13: script::dom::document::Document::handle_mouse_move_event
58.629518:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/document.rs:1509:13
58.952243:    14: script::script_thread::ScriptThread::handle_event
58.952360:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:3530:17
58.953532:    15: script::script_thread::ScriptThread::handle_msg_from_constellation
58.953622:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:1945:62
59.257562:    16: script::script_thread::ScriptThread::handle_msgs::{{closure}}
59.257659:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:1649:53
59.257823:    17: script::script_thread::ScriptThread::profile_event
59.257910:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:1893:13
59.259425:    18: script::script_thread::ScriptThread::handle_msgs
59.259508:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:1643:26
59.259661:    19: script::script_thread::ScriptThread::start
59.259811:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:1447:15
59.260568:    20: <script::script_thread::ScriptThread as script_traits::ScriptThreadFactory>::create::{{closure}}::{{closure}}
59.260645:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:834:25
59.513813:    21: profile_traits::mem::ProfilerChan::run_with_memory_reporting
59.513908:               at /Users/teymouraldridge/Desktop/tmp/servo/components/profile_traits/mem.rs:88:9
59.514301:    22: <script::script_thread::ScriptThread as script_traits::ScriptThreadFactory>::create::{{closure}}
59.514383:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:832:17
59.786689:    23: std::sys_common::backtrace::__rust_begin_short_backtrace
59.786803:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/sys_common/backtrace.rs:130:5
00.055274:    24: std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}
00.055367:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/thread/mod.rs:475:17
00.344558:    25: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
00.344664:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:318:9
00.591635:    26: std::panicking::try::do_call
00.591728:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:348:40
00.995386:    27: ___rust_try
00.995909:    28: std::panicking::try
00.995964:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:325:15
00.996012:    29: std::panic::catch_unwind
00.996043:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:394:14
00.996175:    30: std::thread::Builder::spawn_unchecked::{{closure}}
00.996212:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/thread/mod.rs:474:30
02.844561:    31: core::ops::function::FnOnce::call_once{{vtable.shim}}
02.844662:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ops/function.rs:233:5
02.844714:    32: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
02.844759:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/liballoc/boxed.rs:1074:9
02.844840:        <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
02.844886:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/liballoc/boxed.rs:1074:9
02.844931:        std::sys::unix::thread::Thread::new::thread_start
02.844973:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libstd/sys/unix/thread.rs:87:17
02.845016:    33: __pthread_start

For this one I've done a little further investigation:

The panic is caused by an unwrap in the method parent_style_identity.

    pub fn parent_style_identity<E>(&mut self, el: E) -> OpaqueComputedValues
    where
        E: TElement,
    {
        self.parent_style_identity
            .get_or_insert_with(|| {
                let parent = el.inheritance_parent().unwrap();
                let values =
                    OpaqueComputedValues::from(parent.borrow_data().unwrap().styles.primary());
                values
            })
            .clone()
    }

Adding a dbg! invocation for parent gives: [components/style/sharing/mod.rs:217] parent = <html> (0x251be057f190) – so my guess is that the html node is borrowed mutably somewhere else which causes a panic when trying to borrow it here.

02.946148:  Stack trace for thread "ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }"
02.948924:     0: backtrace::backtrace::libunwind::trace
02.949074:               at /Users/teymouraldridge/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.54/src/backtrace/libunwind.rs:90:5
02.949158:        backtrace::backtrace::trace_unsynchronized
02.949206:               at /Users/teymouraldridge/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.54/src/backtrace/mod.rs:66:5
02.949340:     1: <servo::backtrace::Print as core::fmt::Debug>::fmt
02.949386:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/backtrace.rs:49:13
02.949427:     2: core::fmt::write
02.949463:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libcore/fmt/mod.rs:1117:17
02.949500:     3: std::io::Write::write_fmt
02.949629:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/io/mod.rs:1508:15
02.949682:     4: servo::backtrace::print
02.949727:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/backtrace.rs:17:5
02.954320:     5: servo::install_crash_handler::handler
02.954414:               at /Users/teymouraldridge/Desktop/tmp/servo/ports/winit/main2.rs:67:21
02.958877:     6: __sigtramp
03.198685:     7: mozjs::rust::get_object_class
03.198761:               at /Users/teymouraldridge/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/e9f71b6/src/rust.rs:1205:5
03.453457:     8: script::dom::bindings::conversions::get_dom_class
03.453538:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/bindings/conversions.rs:392:17
03.739182:     9: script::dom::bindings::inheritance::Castable::is
03.739268:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/bindings/inheritance.rs:22:30
03.739299:    10: script::dom::bindings::inheritance::Castable::downcast
03.739330:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/bindings/inheritance.rs:40:12
03.739497:    11: script::dom::node::Node::inclusive_ancestors::{{closure}}
03.739585:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/node.rs:1015:48
03.739807:    12: <script::dom::node::SimpleNodeIterator<I> as core::iter::traits::iterator::Iterator>::next::{{closure}}
03.739862:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/node.rs:1697:54
04.523673:    13: core::option::Option<T>::and_then
04.523761:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/option.rs:671:24
04.524004:    14: <script::dom::node::SimpleNodeIterator<I> as core::iter::traits::iterator::Iterator>::next
04.524064:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/node.rs:1697:24
04.524206:    15: core::iter::traits::iterator::Iterator::nth
04.524267:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/iter/traits/iterator.rs:328:29
04.524973:    16: script::dom::document::Document::note_node_with_dirty_descendants
04.525058:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/document.rs:481:28
04.726476:    17: script::dom::node::Node::note_dirty_descendants
04.726560:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/node.rs:639:9
04.929059:    18: script::dom::element::Element::detach_shadow
04.929140:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/element.rs:519:13
04.929186:    19: script::dom::document::Document::unregister_media_controls
04.929214:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/document.rs:2808:13
05.128566:    20: script::dom::htmlmediaelement::HTMLMediaElement::remove_controls
05.128647:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/htmlmediaelement.rs:1916:13
05.129431:    21: <script::dom::htmlmediaelement::HTMLMediaElement as core::ops::drop::Drop>::drop
05.129492:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/dom/htmlmediaelement.rs:1992:9
05.130152:    22: core::ptr::drop_in_place
05.130201:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
05.130864:    23: core::ptr::drop_in_place
05.130901:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
05.131589:    24: core::ptr::drop_in_place
05.131658:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
05.132450:    25: script::dom::bindings::codegen::Bindings::HTMLVideoElementBinding::HTMLVideoElementBinding::_finalize::{{closure}}
05.132492:               at /Users/teymouraldridge/Desktop/tmp/servo/target/debug/build/script-fed36a29e26350f2/out/Bindings/HTMLVideoElementBinding.rs:800:65
05.140064:    26: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once
05.140144:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ops/function.rs:286:13
05.143234:    27: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
05.143300:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:318:9
05.148519:    28: std::panicking::try::do_call
05.148595:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:348:40
05.731664:    29: ___rust_try
05.731803:    30: std::panicking::try
05.731859:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:325:15
05.731897:    31: std::panic::catch_unwind
05.731933:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:394:14
05.731959:    32: mozjs::panic::wrap_panic
05.731982:               at /Users/teymouraldridge/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/e9f71b6/src/panic.rs:22:11
05.930892:    33: script::dom::bindings::codegen::Bindings::HTMLVideoElementBinding::HTMLVideoElementBinding::_finalize
05.930977:               at /Users/teymouraldridge/Desktop/tmp/servo/target/debug/build/script-fed36a29e26350f2/out/Bindings/HTMLVideoElementBinding.rs:795:5
06.659084:    34: _ZNK7JSClass10doFinalizeEP8JSFreeOpP8JSObject
06.659162:               at /Users/teymouraldridge/Desktop/tmp/servo/target/debug/build/mozjs_sys-7973a194190ba5f7/out/build/dist/include/js/Class.h:831:5
06.659203:        _ZN8JSObject8finalizeEP8JSFreeOp
06.659229:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/vm/JSObject-inl.h:69:12
06.659254:        _ZN2js2gc5Arena8finalizeI8JSObjectEEmP8JSFreeOpNS0_9AllocKindEm
06.659277:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:472:10
06.665104:    35: _ZL19FinalizeTypedArenasI8JSObjectEbP8JSFreeOpPPN2js2gc5ArenaERNS4_15SortedArenaListENS4_9AllocKindERNS3_11SliceBudgetE
06.665221:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:528:29
06.667371:    36: _ZN2js2gc10ArenaLists18foregroundFinalizeEP8JSFreeOpNS0_9AllocKindERNS_11SliceBudgetERNS0_15SortedArenaListE
06.667441:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:5628:8
06.668700:    37: _ZN2js2gc9GCRuntime17finalizeAllocKindEP8JSFreeOpRNS_11SliceBudgetE
06.668765:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:5951:26
06.672578:    38: _ZN11sweepaction18SweepActionForEachI13ContainerIterIN7mozilla7EnumSetIN2js2gc9AllocKindEyEEES7_E3runERNS5_11SweepAction4ArgsE
06.672668:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6177:19
06.674188:    39: _ZN11sweepaction19SweepActionSequence3runERN2js2gc11SweepAction4ArgsE
06.674257:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6142:23
06.676130:    40: _ZN11sweepaction18SweepActionForEachIN2js2gc19SweepGroupZonesIterEP9JSRuntimeE3runERNS2_11SweepAction4ArgsE
06.676189:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6177:19
06.676218:    41: _ZN11sweepaction19SweepActionSequence3runERN2js2gc11SweepAction4ArgsE
06.676242:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6142:23
06.677270:    42: _ZN11sweepaction18SweepActionForEachIN2js2gc15SweepGroupsIterEP9JSRuntimeE3runERNS2_11SweepAction4ArgsE
06.677315:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6177:19
06.680272:    43: _ZN2js2gc9GCRuntime19performSweepActionsERNS_11SliceBudgetE
06.680366:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6310:48
06.693607:    44: _ZN2js2gc9GCRuntime16incrementalSliceERNS_11SliceBudgetERKN7mozilla5MaybeI18JSGCInvocationKindEEN2JS8GCReasonERNS0_13AutoGCSessionE
06.693719:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:6830:11
06.709649:    45: _ZN2js2gc9GCRuntime7gcCycleEbNS_11SliceBudgetERKN7mozilla5MaybeI18JSGCInvocationKindEEN2JS8GCReasonE
06.709727:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:7243:3
06.724482:    46: _ZN2js2gc9GCRuntime7collectEbNS_11SliceBudgetERKN7mozilla5MaybeI18JSGCInvocationKindEEN2JS8GCReasonE
06.724561:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:7428:9
06.724749:    47: _ZN2js2gc9GCRuntime2gcE18JSGCInvocationKindN2JS8GCReasonE
06.724803:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/gc/GC.cpp:7510:3
07.192638:    48: _ZN9JSRuntime14destroyRuntimeEv
07.192715:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/vm/Runtime.cpp:285:8
07.832705:    49: _ZN2js14DestroyContextEP9JSContext
07.832792:               at /Users/teymouraldridge/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/a40b829/mozjs/js/src/vm/JSContext.cpp:198:7
07.851278:    50: <mozjs::rust::Runtime as core::ops::drop::Drop>::drop
07.851367:               at /Users/teymouraldridge/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/e9f71b6/src/rust.rs:428:13
07.852448:    51: core::ptr::drop_in_place
07.852521:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
07.853990:    52: core::ptr::drop_in_place
07.854068:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
07.854638:    53: core::ptr::drop_in_place
07.854699:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
07.855366:    54: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop
07.855417:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/liballoc/rc.rs:1152:17
07.855498:    55: core::ptr::drop_in_place
07.855547:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
07.856404:    56: core::ptr::drop_in_place
07.856468:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ptr/mod.rs:184:1
07.856584:    57: <script::script_thread::ScriptThread as script_traits::ScriptThreadFactory>::create::{{closure}}
07.856630:               at /Users/teymouraldridge/Desktop/tmp/servo/components/script/script_thread.rs:844:13
07.856700:    58: std::sys_common::backtrace::__rust_begin_short_backtrace
07.856750:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/sys_common/backtrace.rs:130:5
07.856917:    59: std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}
07.856964:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/thread/mod.rs:475:17
07.857087:    60: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
07.857132:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:318:9
07.857185:    61: std::panicking::try::do_call
07.857221:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:348:40
07.857391:    62: ___rust_try
07.857457:    63: std::panicking::try
07.857500:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panicking.rs:325:15
07.857560:    64: std::panic::catch_unwind
07.857608:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/panic.rs:394:14
07.857651:    65: std::thread::Builder::spawn_unchecked::{{closure}}
07.857689:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/thread/mod.rs:474:30
07.857785:    66: core::ops::function::FnOnce::call_once{{vtable.shim}}
07.857831:               at /Users/teymouraldridge/.rustup/toolchains/nightly-2020-07-27-x86_64-apple-darwin/lib/rustlib/src/rust/src/libcore/ops/function.rs:233:5
07.857948:    67: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
07.858003:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/liballoc/boxed.rs:1074:9
07.858061:        <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
07.858102:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/liballoc/boxed.rs:1074:9
07.858141:        std::sys::unix::thread::Thread::new::thread_start
07.858176:               at /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libstd/sys/unix/thread.rs:87:17
07.858232:    68: __pthread_start
08.444510:  Servo exited with return value 11
@jdm jdm added A-content/script Related to the script thread I-crash No impact; the issue is one of maintainability or tidiness. I-panic Servo encounters a panic. labels Dec 28, 2020
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A-content/script Related to the script thread I-crash No impact; the issue is one of maintainability or tidiness. I-panic Servo encounters a panic.
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