Linux 版 UE4 で Vulkan レンダラに関連するクラッシュが補足できた。Ubuntu だとこの状態になると入力を受け付けなくなってエラーメッセージを見たりできなかったけど、Xubuntu だとターミナルにフォーカスして ^C でプロセスを殺せた。
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 40 (X_TranslateCoords)
Resource id in failed request: 0x1116c2b
Serial number of failed request: 30492
Current serial number in output stream: 30492
[2021.01.05-06.41.23:134][838]LogOutputDevice: Warning:
Script Stack (0 frames):
Assertion failed: !GIsRHIInitialized || !GRHISupportsRHIThread [File:Runtime/RHI/Public/RHIStaticStates.h] [Line: 98]
[2021.01.05-06.41.23:135][838]LogCore: Error: appError called: Assertion failed: !GIsRHIInitialized || !GRHISupportsRHIThread [File:Runtime/RHI/Public/RHIStaticStates.h] [Line: 98]
Signal 11 caught.
Malloc Size=65538 LargeMemoryPoolOffset=65554
CommonUnixCrashHandler: Signal=11
[2021.01.05-06.41.23:141][838]LogCore: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to write memory at address 0x0000000000000003
[2021.01.05-06.41.23:141][838]LogCore: Assertion failed: !GIsRHIInitialized || !GRHISupportsRHIThread [File:Runtime/RHI/Public/RHIStaticStates.h] [Line: 98]