Unreal Engine Issues and Bug Tracker (UE-40122)

Description

This is a commonly reported crash from Mac users in the community. The repro steps are currently unknown, and appear to be varied based on user information below.

zoomed out quickly while in a blueprint
testing multiplayer...
Messing about in Blueprint editor. Lighting trying to build in background. CRASH!
setup ios provisioning profile
add step in blueprint
Set Pawn as dynamic collider. Play...then crash.
Was lightmapping a scene, the editor just crashed no input on my part
Editing new service.
Doublie clikced a lightmap in world settings
Random crash, editor just closed, wasn't doing anything.
different every time
random
to many buggs, looks like anouther bollocks ver
Baked a scene...
Just idling in the blueprint screen.....
Used cheats to spawn a flinger
Clicked in the game client after coming back from lunch
Mac client crash completing a ride the lightning mission and returning to the front end.

The Callstack as reported in CrashReporter includes little information, however the submitted log files contain more details. Both Callstacks are displayed above.

Steps to Reproduce

Repro steps currently unknown

Callstack

Original Callstack as reported in CrashReporter

UE4Editor-Core.dylib!FThreadStats::FThreadStats()
UE4Editor-Core.dylib!FThreadStatsPool::GetFromPool()
UE4Editor-MetalRHI.dylib!<Unknown>
Metal!<Unknown>
Metal!<Unknown>
Metal!<Unknown>
Metal!<Unknown>
IOAccelerator!<Unknown>
IOKit!<Unknown>
IOKit!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libdispatch.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>
libsystem_pthread.dylib!<Unknown>
???!Unknown()

Callstack from log files

SIGSEGV: invalid attempt to access memory at address 0x0

FThreadStats::FThreadStats() Address = 0x8c6d1a1  (filename not found) [in UE4Editor-Core.dylib]
FThreadStatsPool::GetFromPool() Address = 0x8c6ce4d  (filename not found) [in UE4Editor-Core.dylib]
___ZN13FMetalSurface6UnlockEjj_block_invoke.1100() Address = 0x47780c45 (filename not found) [in UE4Editor-MetalRHI.dylib]
_doMTLDispatch() Address = 0xcc01dfba (filename not found) [in Metal]
-[_MTLCommandBuffer didCompleteWithStartTime:endTime:error:] Address = 0xcc01f041 (filename not found) [in Metal]
-[MTLIOAccelCommandBuffer didCompleteWithStartTime:endTime:error:] Address = 0xcbfeae21 (filename not found) [in Metal]
-[_MTLCommandQueue commandBufferDidComplete:startTime:completionTime:error:] Address = 0xcc023156 (filename not found) [in Metal]
ioAccelCommandQueueBlockFenceCallback() Address = 0xd753e8cc (filename not found) [in IOAccelerator]
IODispatchCalloutFromCFMessage() Address = 0xca81eb78 (filename not found) [in IOKit]
_IODispatchCalloutWithDispatch() Address = 0xca81ebf7 (filename not found) [in IOKit]
dispatch_mig_server() Address = 0xdddef600 (filename not found) [in libdispatch.dylib]
_dispatch_client_callout() Address = 0xddde10b8 (filename not found) [in libdispatch.dylib]
_dispatch_continuation_pop() Address = 0xdddf6b5b (filename not found) [in libdispatch.dylib]
_dispatch_source_latch_and_call() Address = 0xdddeca6a (filename not found) [in libdispatch.dylib]
_dispatch_source_invoke() Address = 0xddde38f6 (filename not found) [in libdispatch.dylib]
_dispatch_queue_serial_drain() Address = 0xdddf7920 (filename not found) [in libdispatch.dylib]
_dispatch_queue_invoke() Address = 0xddde9cd9 (filename not found) [in libdispatch.dylib]
_dispatch_root_queue_drain_deferred_item() Address = 0xdddf8391 (filename not found) [in libdispatch.dylib]
_dispatch_kevent_worker_thread() Address = 0xdddfb1b0 (filename not found) [in libdispatch.dylib]
_pthread_wqthread() Address = 0xde02e5eb (filename not found) [in libsystem_pthread.dylib]
start_wqthread() Address = 0xde02e1ed (filename not found) [in libsystem_pthread.dylib]

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Duplicate

Component	UE - Platform - Apple
Affects Versions	4.14, 4.14.1

Created	Jan 3, 2017
Resolved	Jan 5, 2017
Updated	Sep 16, 2019

UE-40122

[CrashReport] Mac crash in FThreadStats::FThreadStats()

[CrashReport] Mac crash in FThreadStats::FThreadStats()

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