Attachment 1446793 Details for Bug 1585064 – Backtrace from Chase website tab crash.

Backtrace from Chase website tab crash.

backtracechase.txt (text/plain), 42.17 KB, created by Ryan Farmer on 2018-06-01 20:06:24 UTC

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Description:

Filename:

MIME Type:

Creator: Ryan Farmer

Created: 2018-06-01 20:06:24 UTC

Size: 42.17 KB

patch

obsolete

>$ coredumpctl gdb
>           PID: 4166 (WebKitWebProces)
>           UID: 1000 (ryanfarmer)
>           GID: 1000 (ryanfarmer)
>        Signal: 11 (SEGV)
>     Timestamp: Fri 2018-06-01 14:47:15 CDT (28s ago)
>  Command Line: /usr/libexec/webkit2gtk-4.0/WebKitWebProcess 9 43
>    Executable: /usr/libexec/webkit2gtk-4.0/WebKitWebProcess
> Control Group: /user.slice/user-1000.slice/session-2.scope
>          Unit: session-2.scope
>         Slice: user-1000.slice
>       Session: 2
>     Owner UID: 1000 (ryanfarmer)
>       Boot ID: 3814123cd1474e9a833881b10e3bda26
>    Machine ID: c6637e2e1f224a4ebc1935538141920c
>      Hostname: localhost.localdomain
>       Storage: /var/lib/systemd/coredump/core.WebKitWebProces.1000.3814123cd1474e9a833881b10e3bda26.4166.1527882435000000.lz4
>       Message: Process 4166 (WebKitWebProces) of user 1000 dumped core.
>                
>                Stack trace of thread 4252:
>                #0  0x00007fa8cabca5a9 _ZN6WebKit27CoordinatedBackingStoreTile13setBackBufferERKN7WebCore7IntRectES4_ON3WTF6RefPtrIN7Nicosia6BufferENS5_13DumbPtrTraitsIS8_EEEERKNS1_8IntPointE (libwebkit2gtk-4.0.so.37)
>                #1  0x00007fa8cabca646 _ZN6WebKit23CoordinatedBackingStore10updateTileEjRKN7WebCore7IntRectES4_ON3WTF6RefPtrIN7Nicosia6BufferENS5_13DumbPtrTraitsIS8_EEEERKNS1_8IntPointE (libwebkit2gtk-4.0.so.37)
>                #2  0x00007fa8cabce8f2 _ZN6WebKit24CoordinatedGraphicsScene19updateTilesIfNeededEPN7WebCore18TextureMapperLayerERKNS1_29CoordinatedGraphicsLayerStateE (libwebkit2gtk-4.0.so.37)
>                #3  0x00007fa8cabcf9c9 _ZN6WebKit24CoordinatedGraphicsScene13setLayerStateEjRKN7WebCore29CoordinatedGraphicsLayerStateE (libwebkit2gtk-4.0.so.37)
>                #4  0x00007fa8cabd01b5 _ZN6WebKit24CoordinatedGraphicsScene16commitSceneStateERKN7WebCore24CoordinatedGraphicsStateE (libwebkit2gtk-4.0.so.37)
>                #5  0x00007fa8cabd0252 _ZN6WebKit24CoordinatedGraphicsScene17applyStateChangesERKN3WTF6VectorIN7WebCore24CoordinatedGraphicsStateELm0ENS1_15CrashOnOverflowELm16ENS1_10FastMallocEEE (libwebkit2gtk-4.0.so.37)
>                #6  0x00007fa8cabd4b85 _ZN6WebKit18ThreadedCompositor15renderLayerTreeEv (libwebkit2gtk-4.0.so.37)
>                #7  0x00007fa8c90dc187 _ZZN3WTF7RunLoop9TimerBaseC4ERS0_ENUlPvE_4_FUNES3_ (libjavascriptcoregtk-4.0.so.18)
>                #8  0x00007fa8c1a8f8ad g_main_dispatch (libglib-2.0.so.0)
>                #9  0x00007fa8c1a8fc78 g_main_context_iterate (libglib-2.0.so.0)
>                #10 0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #11 0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #12 0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #13 0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #14 0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #15 0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4181:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4170:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90e8b64 __gthread_cond_timedwait (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8be15b513 execute_native_thread_routine (libstdc++.so.6)
>                #3  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #4  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4355:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4291:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4166:
>                #0  0x00007fa85c52f880 n/a (n/a)
>                #1  0x00007fa85c4afd45 n/a (n/a)
>                #2  0x00007fa85c1d8792 n/a (n/a)
>                #3  0x00007fa85c23bf49 n/a (n/a)
>                #4  0x00007fa85c46648a n/a (n/a)
>                #5  0x00007fa85c3b67e1 n/a (n/a)
>                #6  0x00007fa8c8c651c8 LowLevelInterpreter.cpp (libjavascriptcoregtk-4.0.so.18)
>                #7  0x00007fa8c8c09c79 _ZN3JSC7JITCode7executeEPNS_2VMEPNS_14ProtoCallFrameE (libjavascriptcoregtk-4.0.so.18)
>                #8  0x00007fa8c8bdb946 _ZN3JSC11Interpreter11executeCallEPNS_9ExecStateEPNS_8JSObjectENS_8CallTypeERKNS_8CallDataENS_7JSValueERKNS_7ArgListE (libjavascriptcoregtk-4.0.so.18)
>                #9  0x00007fa8c8da5098 _ZN3JSC4callEPNS_9ExecStateENS_7JSValueENS_8CallTypeERKNS_8CallDataES2_RKNS_7ArgListE (libjavascriptcoregtk-4.0.so.18)
>                #10 0x00007fa8c8da50bb _ZN3JSC4callEPNS_9ExecStateENS_7JSValueENS_8CallTypeERKNS_8CallDataES2_RKNS_7ArgListERN3WTF8NakedPtrINS_9ExceptionEEE (libjavascriptcoregtk-4.0.so.18)
>                #11 0x00007fa8c8da5238 _ZN3JSC12profiledCallEPNS_9ExecStateENS_15ProfilingReasonENS_7JSValueENS_8CallTypeERKNS_8CallDataES3_RKNS_7ArgListERN3WTF8NakedPtrINS_9ExceptionEEE (libjavascriptcoregtk-4.0.so.18)
>                #12 0x00007fa8cb3834ed _ZN7WebCore21JSMainThreadExecState12profiledCallEPN3JSC9ExecStateENS1_15ProfilingReasonENS1_7JSValueENS1_8CallTypeERKNS1_8CallDataES5_RKNS1_7ArgListERN3WTF8NakedPtrINS1_9ExceptionEEE (libwebkit2gtk-4.0.so.37)
>                #13 0x00007fa8cb38c895 _ZN7WebCore15ScheduledAction7executeERNS_8DocumentE (libwebkit2gtk-4.0.so.37)
>                #14 0x00007fa8cb8eed7f _ZN7WebCore8DOMTimer5firedEv (libwebkit2gtk-4.0.so.37)
>                #15 0x00007fa8cb9e389e _ZN7WebCore12ThreadTimers24sharedTimerFiredInternalEv (libwebkit2gtk-4.0.so.37)
>                #16 0x00007fa8c90dc187 _ZZN3WTF7RunLoop9TimerBaseC4ERS0_ENUlPvE_4_FUNES3_ (libjavascriptcoregtk-4.0.so.18)
>                #17 0x00007fa8c1a8f8ad g_main_dispatch (libglib-2.0.so.0)
>                #18 0x00007fa8c1a8fc78 g_main_context_iterate (libglib-2.0.so.0)
>                #19 0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #20 0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #21 0x00007fa8cad3f358 _ZN6WebKit16ChildProcessMainINS_10WebProcessENS_14WebProcessMainEEEiiPPc (libwebkit2gtk-4.0.so.37)
>                #22 0x00007fa8bd75418b __libc_start_main (libc.so.6)
>                #23 0x000055eadc2d8dfa _start (WebKitWebProcess)
>                
>                Stack trace of thread 4171:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8fd10 g_main_context_iteration (libglib-2.0.so.0)
>                #3  0x00007fa8c1a8fd61 glib_worker_main (libglib-2.0.so.0)
>                #4  0x00007fa8c1ab7f2a g_thread_proxy (libglib-2.0.so.0)
>                #5  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #6  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4331:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4365:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4172:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c22846ba gdbus_shared_thread_func (libgio-2.0.so.0)
>                #4  0x00007fa8c1ab7f2a g_thread_proxy (libglib-2.0.so.0)
>                #5  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #6  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4178:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8fd10 g_main_context_iteration (libglib-2.0.so.0)
>                #3  0x00007fa859e6de4d dconf_gdbus_worker_thread (libdconfsettings.so)
>                #4  0x00007fa8c1ab7f2a g_thread_proxy (libglib-2.0.so.0)
>                #5  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #6  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4250:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4283:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4330:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4173:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4174:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4175:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4176:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4249:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4251:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4281:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4294:
>                #0  0x00007fa8bd820589 __GI___poll (libc.so.6)
>                #1  0x00007fa8c1a8fbe6 g_main_context_poll (libglib-2.0.so.0)
>                #2  0x00007fa8c1a8ffa2 g_main_loop_run (libglib-2.0.so.0)
>                #3  0x00007fa8c90dc610 _ZN3WTF7RunLoop3runEv (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>                
>                Stack trace of thread 4332:
>                #0  0x00007fa8c5f0387a futex_abstimed_wait_cancelable (libpthread.so.0)
>                #1  0x00007fa8c90db25e _ZN3WTF15ThreadCondition9timedWaitERNS_5MutexENS_8WallTimeE (libjavascriptcoregtk-4.0.so.18)
>                #2  0x00007fa8c90afa63 _ZN3WTF10ParkingLot21parkConditionallyImplEPKvRKNS_12ScopedLambdaIFbvEEERKNS3_IFvvEEERKNS_24TimeWithDynamicClockTypeE (libjavascriptcoregtk-4.0.so.18)
>                #3  0x00007fa8c9098c9b _ZN3WTF10ParkingLot17parkConditionallyIZNS_9Condition9waitUntilINS_4LockEEEbRT_RKNS_24TimeWithDynamicClockTypeEEUlvE_ZNS3_IS4_EEbS6_S9_EUlvE0_EENS0_10ParkResultEPKvRKS5_RKT0_S9_ (libjavascriptcoregtk-4.0.so.18)
>                #4  0x00007fa8c90b373f _ZNK3WTF8FunctionIFvvEEclEv (libjavascriptcoregtk-4.0.so.18)
>                #5  0x00007fa8c90da6ed wtfThreadEntryPoint (libjavascriptcoregtk-4.0.so.18)
>                #6  0x00007fa8c5efd594 start_thread (libpthread.so.0)
>                #7  0x00007fa8bd82b00f __clone (libc.so.6)
>
>GNU gdb (GDB) Fedora 8.1-15.fc28
>Copyright (C) 2018 Free Software Foundation, Inc.
>License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
>This is free software: you are free to change and redistribute it.
>There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
>and "show warranty" for details.
>This GDB was configured as "x86_64-redhat-linux-gnu".
>Type "show configuration" for configuration details.
>For bug reporting instructions, please see:
><http://www.gnu.org/software/gdb/bugs/>.
>Find the GDB manual and other documentation resources online at:
><http://www.gnu.org/software/gdb/documentation/>.
>For help, type "help".
>Type "apropos word" to search for commands related to "word"...
>Reading symbols from /usr/libexec/webkit2gtk-4.0/WebKitWebProcess...Reading symbols from /usr/lib/debug/usr/libexec/webkit2gtk-4.0/WebKitWebProcess-2.20.2-1.fc28.x86_64.debug...done.
>done.
>
>warning: core file may not match specified executable file.
>[New LWP 4252]
>[New LWP 4181]
>[New LWP 4170]
>[New LWP 4355]
>[New LWP 4291]
>[New LWP 4166]
>[New LWP 4171]
>[New LWP 4331]
>[New LWP 4365]
>[New LWP 4172]
>[New LWP 4178]
>[New LWP 4250]
>[New LWP 4283]
>[New LWP 4330]
>[New LWP 4173]
>[New LWP 4174]
>[New LWP 4175]
>[New LWP 4176]
>[New LWP 4249]
>[New LWP 4251]
>[New LWP 4281]
>[New LWP 4294]
>[New LWP 4332]
>[Thread debugging using libthread_db enabled]
>Using host libthread_db library "/lib64/libthread_db.so.1".
>
>warning: Loadable section ".note.gnu.property" outside of ELF segments
>
>warning: Loadable section ".note.gnu.property" outside of ELF segments
>Missing separate debuginfo for /lib64/libGLX_mesa.so.0
>Try: dnf --enablerepo='*debug*' install /usr/lib/debug/.build-id/11/b6b6ae43d0df1e50e938dc73ac9ca7be786920.debug
>Core was generated by `/usr/libexec/webkit2gtk-4.0/WebKitWebProcess 9 43'.
>Program terminated with signal SIGSEGV, Segmentation fault.
>#0  0x00007fa8cabca5a9 in WebKit::CoordinatedBackingStoreTile::setBackBuffer (
>    this=0x8, tileRect=..., sourceRect=..., buffer=..., offset=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedBackingStore.cpp:58
>58	    m_bufferOffset = offset;
>[Current thread is 1 (Thread 0x7fa81b1ff700 (LWP 4252))]
>Missing separate debuginfos, use: dnf debuginfo-install PackageKit-gtk3-module-1.1.10-1.fc28.x86_64 epiphany-runtime-3.28.2.1-1.fc28.x86_64 libXxf86vm-1.1.4-7.fc28.x86_64 libcanberra-0.30-16.fc28.x86_64 libcanberra-gtk3-0.30-16.fc28.x86_64 libogg-1.3.2-10.fc28.x86_64 libtdb-1.3.15-4.fc28.x86_64 libtool-ltdl-2.4.6-24.fc28.x86_64 libvorbis-1.3.6-1.fc28.x86_64 libxcrypt-4.0.1-1.fc28.x86_64 p11-kit-0.23.12-1.fc28.x86_64
>(gdb) bt full
>#0  0x00007fa8cabca5a9 in WebKit::CoordinatedBackingStoreTile::setBackBuffer (this=0x8, tileRect=..., sourceRect=..., buffer=..., offset=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedBackingStore.cpp:58
>No locals.
>#1  0x00007fa8cabca646 in WebKit::CoordinatedBackingStore::updateTile (this=this@entry=0x7fa81b666780, id=<optimized out>, sourceRect=..., tileRect=..., buffer=..., 
>    offset=...) at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedBackingStore.cpp:84
>        it = <optimized out>
>#2  0x00007fa8cabce8f2 in WebKit::CoordinatedGraphicsScene::updateTilesIfNeeded (this=this@entry=0x7fa81b669000, layer=<optimized out>, state=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/x86_64-redhat-linux-gnu/DerivedSources/ForwardingHeaders/wtf/ThreadSafeRefCounted.h:42
>        surfaceUpdateInfo = @0x7fa7d76c5614: {updateRect = {m_location = {m_x = 0, m_y = 0}, m_size = {m_width = 512, m_height = 512}}, atlasID = 38, surfaceOffset = {
>            m_x = 512, m_y = 0}}
>        surfaceIt = <optimized out>
>        tile = @0x7fa7d76c5600: {tileID = 350, tileRect = {m_location = {m_x = 0, m_y = 0}, m_size = {m_width = 512, m_height = 512}}, updateInfo = {updateRect = {
>              m_location = {m_x = 0, m_y = 0}, m_size = {m_width = 512, m_height = 512}}, atlasID = 38, surfaceOffset = {m_x = 512, m_y = 0}}}
>        __for_range = @0x7fa7e897e8d0: {<VectorBuffer<WebCore::TileUpdateInfo, 0, WTF::FastMalloc>> = {<VectorBufferBase<WebCore::TileUpdateInfo, WTF::FastMalloc>> = {
>              m_buffer = 0x7fa7d76c5600, m_capacity = 16, m_size = 8, m_mask = 15}, <No data fields>}, <No data fields>}
>        __for_begin = 0x7fa7d76c5600
>        __for_end = 0x7fa7d76c5780
>        backingStore = {static isRefPtr = <optimized out>, m_ptr = 0x7fa81b666780}
>#3  0x00007fa8cabcf9c9 in WebKit::CoordinatedGraphicsScene::setLayerState (this=this@entry=0x7fa81b669000, id=<optimized out>, layerState=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedGraphicsScene.cpp:292
>        layer = 0x7fa8099cc000
>#4  0x00007fa8cabd01b5 in WebKit::CoordinatedGraphicsScene::commitSceneState (this=0x7fa81b669000, state=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedGraphicsScene.cpp:556
>        layer = @0x7fa7e897e6c0: {first = 103, second = {{{positionChanged = false, anchorPointChanged = false, sizeChanged = true, transformChanged = false, 
>                childrenTransformChanged = false, contentsRectChanged = false, opacityChanged = true, solidColorChanged = false, debugVisualsChanged = false, 
>                replicaChanged = false, maskChanged = false, imageChanged = false, flagsChanged = false, animationsChanged = true, filtersChanged = false, 
>                childrenChanged = true, repaintCountChanged = false, platformLayerChanged = false, platformLayerUpdated = false, platformLayerShouldSwapBuffers = false, 
>                isScrollableChanged = false, committedScrollOffsetChanged = false, contentsTilingChanged = false}, changeMask = 41028}, {{contentsOpaque = false, 
>                drawsContent = true, contentsVisible = true, backfaceVisible = true, masksToBounds = false, preserves3D = false, fixedToViewport = false, 
>                isScrollable = false}, flags = 14}, pos = {m_x = 567, m_y = 241}, anchorPoint = {m_x = 0.5, m_y = 0.5, m_z = 0}, size = {m_width = 934, m_height = 314}, 
>            transform = {m_matrix = {{1, 0, 0, 0}, {0, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}}}, childrenTransform = {m_matrix = {{1, 0, 0, 0}, {0, 1, 0, 0}, {0, 0, 1, 0}, {0, 
>                  0, 0, 1}}}, contentsRect = {m_location = {m_x = 0, m_y = 0}, m_size = {m_width = 0, m_height = 0}}, contentsTilePhase = {m_width = 0, m_height = 0}, 
>            contentsTileSize = {m_width = 0, m_height = 0}, opacity = 1, solidColor = {static black = 4278190080, static white = 4294967295, static darkGray = 4286611584, 
>              static gray = 4288716960, static lightGray = 4290822336, static transparent = 0, static cyan = 4278255615, static yellow = 4294967040, 
>              static compositionFill = 4292992341, static extendedColor = 0, static invalidRGBAColor = 1, static validRGBAColorBit = 2, static validRGBAColor = 3, 
>              static deletedHashValue = 18446744073709551613, static emptyHashValue = 18446744073709551611, m_colorData = {rgbaAndFlags = 1, extendedColor = 0x1}}, filters = {
>              m_operations = {<WTF::VectorBuffer<WTF::RefPtr<WebCore::FilterOperation, WTF::DumbPtrTraits<WebCore::FilterOperation> >, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WTF::RefPtr<WebCore::FilterOperation, WTF::DumbPtrTraits<WebCore::FilterOperation> >, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, m_size = 0, 
>                    m_mask = 0}, <No data fields>}, <No data fields>}}, animations = {
>              m_animations = {<WTF::VectorBuffer<WebCore::TextureMapperAnimation, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WebCore::TextureMapperAnimation, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}}, 
>            children = {<VectorBuffer<unsigned int, 0, WTF::FastMalloc>> = {<VectorBufferBase<unsigned int, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, m_size = 0, 
>                  m_mask = 0}, <No data fields>}, <No data fields>}, 
>---Type <return> to continue, or q <return> to quit---
>            tilesToCreate = {<WTF::VectorBuffer<WebCore::TileCreationInfo, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WebCore::TileCreationInfo, WTF::FastMalloc>> = {
>                  m_buffer = 0x0, m_capacity = 0, m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}, 
>            tilesToRemove = {<VectorBuffer<unsigned int, 0, WTF::FastMalloc>> = {<VectorBufferBase<unsigned int, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, 
>                  m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}, replica = 0, mask = 0, imageID = 0, debugVisuals = {debugBorderColor = {
>                static black = 4278190080, static white = 4294967295, static darkGray = 4286611584, static gray = 4288716960, static lightGray = 4290822336, 
>                static transparent = 0, static cyan = 4278255615, static yellow = 4294967040, static compositionFill = 4292992341, static extendedColor = 0, 
>                static invalidRGBAColor = 1, static validRGBAColorBit = 2, static validRGBAColor = 3, static deletedHashValue = 18446744073709551613, 
>                static emptyHashValue = 18446744073709551611, m_colorData = {rgbaAndFlags = 1, extendedColor = 0x1}}, debugBorderWidth = 0, {{showDebugBorders = false, 
>                  showRepaintCounter = false}, flags = 4294967276}}, repaintCount = 0, 
>            tilesToUpdate = {<VectorBuffer<WebCore::TileUpdateInfo, 0, WTF::FastMalloc>> = {<VectorBufferBase<WebCore::TileUpdateInfo, WTF::FastMalloc>> = {
>                  m_buffer = 0x7fa7d76c5600, m_capacity = 16, m_size = 8, m_mask = 15}, <No data fields>}, <No data fields>}, platformLayerProxy = {
>              static isRefPtr = <optimized out>, m_ptr = 0x0}, committedScrollOffset = {m_width = 0, m_height = 0}}}
>        __for_range = <optimized out>
>        __for_begin = 0x7fa7e897e6c0
>        __for_end = 0x7fa7e8983100
>        state = <optimized out>
>        this = 0x7fa81b669000
>        layer = <optimized out>
>        __for_range = <optimized out>
>        __for_begin = <optimized out>
>        __for_end = <optimized out>
>#5  0x00007fa8cabd0252 in WebKit::CoordinatedGraphicsScene::applyStateChanges (this=0x7fa81b669000, states=...)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/CoordinatedGraphicsScene.cpp:91
>        state = @0x7fa7d76c4000: {rootCompositingLayer = 1, scrollPosition = {m_x = 0, m_y = 0}, contentsSize = {m_width = 0, m_height = 0}, coveredRect = {m_location = {
>              m_x = 0, m_y = 0}, m_size = {m_width = 1600, m_height = 791}}, 
>          layersToCreate = {<VectorBuffer<unsigned int, 0, WTF::FastMalloc>> = {<VectorBufferBase<unsigned int, WTF::FastMalloc>> = {m_buffer = 0x7fa81b612800, 
>                m_capacity = 16, m_size = 16, m_mask = 15}, <No data fields>}, <No data fields>}, 
>          layersToUpdate = {<WTF::VectorBuffer<std::pair<unsigned int, WebCore::CoordinatedGraphicsLayerState>, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<std::pair<unsigned int, WebCore::CoordinatedGraphicsLayerState>, WTF::FastMalloc>> = {m_buffer = 0x7fa7e897e000, m_capacity = 43, m_size = 36, 
>                m_mask = 63}, <No data fields>}, <No data fields>}, 
>          layersToRemove = {<VectorBuffer<unsigned int, 0, WTF::FastMalloc>> = {<VectorBufferBase<unsigned int, WTF::FastMalloc>> = {m_buffer = 0x7fa7f8a86620, 
>                m_capacity = 27, m_size = 26, m_mask = 31}, <No data fields>}, <No data fields>}, 
>          imagesToCreate = {<WTF::VectorBuffer<unsigned long, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<unsigned long, WTF::FastMalloc>> = {m_buffer = 0x0, 
>                m_capacity = 0, m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}, 
>          imagesToRemove = {<WTF::VectorBuffer<unsigned long, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<unsigned long, WTF::FastMalloc>> = {m_buffer = 0x0, 
>                m_capacity = 0, m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}, 
>          imagesToUpdate = {<WTF::VectorBuffer<std::pair<unsigned long, WTF::RefPtr<Nicosia::Buffer, WTF::DumbPtrTraits<Nicosia::Buffer> > >, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<std::pair<unsigned long, WTF::RefPtr<Nicosia::Buffer, WTF::DumbPtrTraits<Nicosia::Buffer> > >, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, m_size = 0, 
>                m_mask = 0}, <No data fields>}, <No data fields>}, 
>          imagesToClear = {<WTF::VectorBuffer<unsigned long, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<unsigned long, WTF::FastMalloc>> = {m_buffer = 0x0, 
>                m_capacity = 0, m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}, 
>          updateAtlasesToCreate = {<WTF::VectorBuffer<std::pair<unsigned int, WTF::RefPtr<Nicosia::Buffer, WTF::DumbPtrTraits<Nicosia::Buffer> > >, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<std::pair<unsigned int, WTF::RefPtr<Nicosia::Buffer, WTF::DumbPtrTraits<Nicosia::Buffer> > >, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, 
>---Type <return> to continue, or q <return> to quit---
>                m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}}
>        __for_range = @0x7fa81b1fe8b0: {<WTF::VectorBuffer<WebCore::CoordinatedGraphicsState, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WebCore::CoordinatedGraphicsState, WTF::FastMalloc>> = {m_buffer = 0x7fa7d76c4000, m_capacity = 16, m_size = 1, m_mask = 15}, <No data fields>}, <No data fields>}
>        __for_begin = 0x7fa7d76c4000
>        __for_end = 0x7fa7d76c40e8
>#6  0x00007fa8cabd4b85 in WebKit::ThreadedCompositor::renderLayerTree (this=0x7fa838236930)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WebKit/Shared/CoordinatedGraphics/threadedcompositor/ThreadedCompositor.cpp:259
>        scrollPosition = {m_x = 0, m_y = 0}
>        scaleFactor = <optimized out>
>        drawsBackground = <optimized out>
>        needsResize = <optimized out>
>        states = {<WTF::VectorBuffer<WebCore::CoordinatedGraphicsState, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WebCore::CoordinatedGraphicsState, WTF::FastMalloc>> = {
>              m_buffer = 0x7fa7d76c4000, m_capacity = 16, m_size = 1, m_mask = 15}, <No data fields>}, <No data fields>}
>        viewportSize = {m_width = 3200, m_height = 1554}
>        atlasesToRemove = {<VectorBuffer<unsigned int, 0, WTF::FastMalloc>> = {<VectorBufferBase<unsigned int, WTF::FastMalloc>> = {m_buffer = 0x0, m_capacity = 0, 
>              m_size = 0, m_mask = 0}, <No data fields>}, <No data fields>}
>        viewportTransform = {m_matrix = {{2, 0, 0, 0}, {0, 2, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}}}
>        scaleFactor = <optimized out>
>        drawsBackground = <optimized out>
>        needsResize = <optimized out>
>        locker = <optimized out>
>        state = <optimized out>
>        __for_end = <optimized out>
>        viewportTransform = <optimized out>
>        coordinateUpdate = <optimized out>
>        this = 0x7fa838236930
>        scrollPosition = <optimized out>
>        states = <optimized out>
>        __for_range = <optimized out>
>        __for_begin = <optimized out>
>        viewportSize = <optimized out>
>        atlasesToRemove = <optimized out>
>        viewportSize = <optimized out>
>        scrollPosition = <optimized out>
>        scaleFactor = <optimized out>
>        drawsBackground = <optimized out>
>        needsResize = <optimized out>
>        states = <optimized out>
>        atlasesToRemove = <optimized out>
>        viewportTransform = <optimized out>
>        locker = <optimized out>
>        coordinateUpdate = <optimized out>
>        state = <optimized out>
>---Type <return> to continue, or q <return> to quit---
>        __for_range = <optimized out>
>        __for_begin = <optimized out>
>        __for_end = <optimized out>
>#7  0x00007fa8c90dc187 in WTF::RunLoop::TimerBase::<lambda(gpointer)>::operator() (__closure=0x0, userData=0x7fa81b664120)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/glib/RunLoopGLib.cpp:170
>        timer = 0x7fa81b664120
>        source = 0x55eade56c2b0
>#8  WTF::RunLoop::TimerBase::<lambda(gpointer)>::_FUN(gpointer) () at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/glib/RunLoopGLib.cpp:176
>No locals.
>#9  0x00007fa8c1a8f8ad in g_main_dispatch (context=0x7fa80c000b20) at gmain.c:3177
>        dispatch = 0x7fa8c90dbbd0 <WTF::<lambda(GSource*, GSourceFunc, gpointer)>::_FUN(GSource *, GSourceFunc, gpointer)>
>        prev_source = 0x0
>        was_in_call = 0
>        user_data = 0x7fa81b664120
>        callback = 0x7fa8c90dc170 <WTF::RunLoop::TimerBase::<lambda(gpointer)>::_FUN(gpointer)>
>        cb_funcs = 0x7fa8c1d59280 <g_source_callback_funcs>
>        cb_data = 0x55eade56bdd0
>        need_destroy = <optimized out>
>        source = 0x55eade56c2b0
>        current = 0x7fa828001a50
>        i = 0
>        current = <optimized out>
>        i = <optimized out>
>        __func__ = "g_main_dispatch"
>        source = <optimized out>
>        _g_boolean_var_ = <optimized out>
>        was_in_call = <optimized out>
>        user_data = <optimized out>
>        callback = <optimized out>
>        cb_funcs = <optimized out>
>        cb_data = <optimized out>
>        need_destroy = <optimized out>
>        dispatch = <optimized out>
>        prev_source = <optimized out>
>        _g_boolean_var_ = <optimized out>
>#10 g_main_context_dispatch (context=context@entry=0x7fa80c000b20) at gmain.c:3830
>No locals.
>#11 0x00007fa8c1a8fc78 in g_main_context_iterate (context=0x7fa80c000b20, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3903
>        max_priority = 110
>        timeout = 0
>        some_ready = 1
>        nfds = <optimized out>
>        allocated_nfds = 1
>---Type <return> to continue, or q <return> to quit---
>        fds = 0x7fa80c001e50
>#12 0x00007fa8c1a8ffa2 in g_main_loop_run (loop=0x7fa80c001d20) at gmain.c:4099
>        self = <optimized out>
>        __func__ = "g_main_loop_run"
>#13 0x00007fa8c90dc610 in WTF::RunLoop::run () at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/glib/RunLoopGLib.cpp:96
>        runLoop = @0x7fa81b666000: {<WTF::FunctionDispatcher> = {<WTF::ThreadSafeRefCounted<WTF::FunctionDispatcher>> = {<WTF::ThreadSafeRefCountedBase> = {
>                m_refCount = {<std::__atomic_base<unsigned int>> = {static _S_alignment = 4, _M_i = 3}, <No data fields>}}, <No data fields>}, 
>            _vptr.FunctionDispatcher = 0x7fa8c93302a8 <vtable for WTF::RunLoop+16>}, m_functionQueueLock = {static isHeldBit = 1 '\001', static hasParkedBit = 2 '\002', 
>            m_byte = {value = {<std::__atomic_base<unsigned char>> = {static _S_alignment = 1, _M_i = 0 '\000'}, <No data fields>}}}, m_functionQueue = {m_start = 5, 
>            m_end = 5, m_buffer = {<WTF::VectorBufferBase<WTF::Function<void()>, WTF::FastMalloc>> = {m_buffer = 0x7fa832830680, m_capacity = 16, m_size = 0, 
>                m_mask = 15}, <No data fields>}}, m_mainContext = {m_ptr = 0x7fa80c000b20}, 
>          m_mainLoops = {<WTF::VectorBuffer<WTF::GRefPtr<_GMainLoop>, 0, WTF::FastMalloc>> = {<WTF::VectorBufferBase<WTF::GRefPtr<_GMainLoop>, WTF::FastMalloc>> = {
>                m_buffer = 0x7fa81b667000, m_capacity = 16, m_size = 1, m_mask = 15}, <No data fields>}, <No data fields>}, m_source = {m_ptr = 0x7fa80c001d40}}
>        mainContext = 0x7fa80c000b20
>        innermostLoop = 0x7fa80c001d20
>        nestedMainLoop = <optimized out>
>#14 0x00007fa8c90b373f in WTF::Function<void ()>::operator()() const (this=<synthetic pointer>)
>    at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/Threading.cpp:129
>No locals.
>#15 WTF::Thread::entryPoint (newThreadContext=0x7fa81b6e24b0) at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/Threading.cpp:129
>        function = {m_callableWrapper = std::unique_ptr<WTF::Function<void()>::CallableWrapperBase> = {get() = 0x7fa81b63bc48}}
>#16 0x00007fa8c90da6ed in WTF::wtfThreadEntryPoint (context=<optimized out>) at /usr/src/debug/webkit2gtk3-2.20.2-1.fc28.x86_64/Source/WTF/wtf/ThreadingPthreads.cpp:223
>No locals.
>#17 0x00007fa8c5efd594 in start_thread (arg=<optimized out>) at pthread_create.c:463
>        pd = <optimized out>
>        now = <optimized out>
>        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140359986312960, 707347740129360016, 140721086544622, 140721086544623, 140721086544768, 140721086544768, 
>                -684204944926574448, -684394473552873328}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
>        not_first_call = <optimized out>
>#18 0x00007fa8bd82b00f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
>No locals.

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