[Ubuntu] UE4 Editor crash AFTER playing templates

Hello

I am running the UE4 Editor (Release branch) on Ubuntu, everything compiled fine and seems to be working until I try and Play a template. Playing the Blank C++ template with no starter content gives me a signal 11 error (Full console output below). I have tried completely deleting and re-downloading and compiling multiple times.

I have tried a few different templates and have experienced similar results every time.

[2015.10.22-23.29.35:253][325]LogPlayLevel: PlayLevel: No blueprints needed recompiling
[2015.10.22-23.29.35:254][325]PIE: New page: PIE session: Untitled_1 (23 Oct 2015 9:29:35 pm)
[2015.10.22-23.29.35:254][325]LogPlayLevel: Creating play world package: /Temp/UEDPIE_0_Untitled_1
[2015.10.22-23.29.35:257][325]LogPlayLevel: PIE: StaticDuplicateObject took: (0.002899s)
[2015.10.22-23.29.35:259][325]LogAIModule: Creating AISystem for world Untitled_1
[2015.10.22-23.29.35:259][325]LogPlayLevel: PIE: World Init took: (0.002112s)
[2015.10.22-23.29.35:259][325]LogPlayLevel: PIE: Created PIE world by copying editor world from /Temp/Untitled_1.Untitled_1 to /Temp/UEDPIE_0_Untitled_1.Untitled_1 (0.005451s)
[2015.10.22-23.29.35:342][325]LogALAudio: ALAudio device opened : OpenAL Soft
[2015.10.22-23.29.35:343][325]LogALAudio: AL_VENDOR      : OpenAL Community
[2015.10.22-23.29.35:343][325]LogALAudio: AL_RENDERER    : OpenAL Soft
[2015.10.22-23.29.35:343][325]LogALAudio: AL_VERSION     : 1.1 ALSOFT 1.15.1
[2015.10.22-23.29.35:343][325]LogALAudio: AL_EXTENSIONS  : AL_EXT_ALAW AL_EXT_DOUBLE AL_EXT_EXPONENT_DISTANCE AL_EXT_FLOAT32 AL_EXT_IMA4 AL_EXT_LINEAR_DISTANCE AL_EXT_MCFORMATS AL_EXT_MULAW AL_EXT_MULAW_MCFORMATS AL_EXT_OFFSET AL_EXT_source_distance_model AL_LOKI_quadriphonic AL_SOFT_buffer_samples AL_SOFT_buffer_sub_data AL_SOFTX_deferred_updates AL_SOFT_direct_channels AL_SOFT_loop_points AL_SOFT_source_latency
[2015.10.22-23.29.35:344][325]LogInit: FAudioDevice initialized.
[2015.10.22-23.29.35:437][325]LogWorld: Game class is 'GameMode'
[2015.10.22-23.29.35:457][325]LogWorld: Bringing World /Temp/UEDPIE_0_Untitled_1.Untitled_1 up for play (max tick rate 0) at 2015.10.23-10.29.35
[2015.10.22-23.29.35:457][325]LogActor:Warning: GameSession /Temp/UEDPIE_0_Untitled_1.Untitled_1:PersistentLevel.GameSession_0 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
[2015.10.22-23.29.35:458][325]LogActor:Warning: GameNetworkManager /Temp/UEDPIE_0_Untitled_1.Untitled_1:PersistentLevel.GameNetworkManager_0 has natively added scene component(s), but none of them were set as the actor's RootComponent - picking one arbitrarily
[2015.10.22-23.29.35:459][325]LogWorld: Bringing up level for play took: 0.013251
[2015.10.22-23.29.35:511][325]PIE: Info Play in editor start time for /Temp/UEDPIE_0_Untitled_1 0.257
[2015.10.22-23.29.49:868][102]LogALAudio: Closing ALAudio device : OpenAL Soft
[2015.10.22-23.29.49:872][102]LogParticles: Destroying 0 GPU particle simulations for FXSystem 0x0x11e1d4c0
Signal 11 caught.
EngineCrashHandler: Signal=11
Signal 11 caught.
EngineCrashHandler: Signal=11
[2015.10.22-23.29.53:331][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
[2015.10.22-23.29.53:341][  0]LogExit: Preparing to exit.
[2015.10.22-23.29.53:344][  0]LogExit: Exiting.
[2015.10.22-23.29.54:089][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
[2015.10.22-23.29.54:100][  0]LogExit: Preparing to exit.
[2015.10.22-23.29.54:103][  0]LogExit: Exiting.
[2015.10.22-23.29.56:286][  0]LogGenericPlatformMisc: FPlatformMisc::RequestExit(0)
[2015.10.22-23.29.56:296][  0]LogExit: Preparing to exit.
[2015.10.22-23.29.56:299][  0]LogExit: Exiting.