Description

This is a somewhat common crash on Mac that has affected users since 4.16. Users have not provided any descriptions of their actions when the crash occurred.

Callstack from Log

[2017.09.08-05.17.43:478][756]Cmd: QUIT_EDITOR
[2017.09.08-05.17.43:572][756]LogExit: Preparing to exit.
[2017.09.08-05.17.43:629][756]LogMac: === Critical error: ===
SIGSEGV: invalid attempt to access memory at address 0x0

[2017.09.08-05.17.43:629][756]LogMac: scalable_msize() Address = 0xb58ad6b  (filename not found) [in UE4Editor-Core.dylib]
FMallocTBB::Realloc(void*, unsigned long, unsigned int) Address = 0xb6b44bb  (filename not found) [in UE4Editor-Core.dylib]
FMemory::Realloc(void*, unsigned long, unsigned int) Address = 0xb6ba741  (filename not found) [in UE4Editor-Core.dylib]
TArray<FDeferredMacEvent, FDefaultAllocator>::ResizeGrow(int) Address = 0xb7ce573  (filename not found) [in UE4Editor-Core.dylib]
FMacApplication::DeferEvent(NSObject*) Address = 0xb7e97cb  (filename not found) [in UE4Editor-Core.dylib]
invocation function for block in FMacApplication::FMacApplication() Address = 0xb7ee01a  (filename not found) [in UE4Editor-Core.dylib]
_NSSendEventToObservers() Address = 0xa99097fa (filename not found) [in AppKit]
-[NSApplication(NSEvent) sendEvent:] Address = 0xa9f0223f (filename not found) [in AppKit]
-[NSApplication run] Address = 0xa977d427 (filename not found) [in AppKit]
tchar_main(int, wchar_t**) Address = 0xb5230f3  (filename not found) [in UE4Editor]
main() Address = 0xb522979  (filename not found) [in UE4Editor]
start() Address = 0xc1408235 (filename not found) [in libdyld.dylib]
Steps to Reproduce

repro steps currently unknown

Callstack
SEGV_NOOP at 0x0

UE4Editor-Core.dylib!<Unknown>
UE4Editor-Core.dylib!FMallocTBB::Realloc()
UE4Editor-Core.dylib!FMemory::Realloc()
UE4Editor-Core.dylib!TArray<FDeferredMacEvent, FDefaultAllocator>::ResizeGrow()
UE4Editor-Core.dylib!FMacApplication::DeferEvent()
UE4Editor-Core.dylib!<Unknown>
AppKit!<Unknown>
AppKit!-[NSApplication()
AppKit!<Unknown>
UE4Editor!tchar_main()
UE4Editor!<Unknown>
libdyld.dylib!<Unknown>

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Fixed
ComponentUE - Platform - Apple
Affects Versions4.164.17
Target Fix4.18
Fix Commit3676002
Release Commit3676002
CreatedSep 14, 2017
ResolvedOct 2, 2017
UpdatedApr 27, 2018
View Jira Issue