Qt Critical: Unhandled exception!

[xCISACx]

Describe the bug
Moonlight randomly crashes with a critical unhandled exception.

Steps to reproduce
Minimise Moonlight and tab back into it.

Affected games
All.

Moonlight settings (please complete the following information)

• Have any settings been adjusted from defaults? Yes
• If so, which settings have been changed? 1080p, 144 FPS, 80 Mbps, V-Sync Off
• Does the problem still occur after reverting settings back to default? Yes

Client PC details (please complete the following information)

• OS: Windows 11 23H2
• Moonlight Version: 5.0.1
• GPU: RTX 2060 Mobile

Server PC details (please complete the following information)

• OS: Windows 11 23H2
• GeForce Experience version: I use Sunshine. 3.27.0.120
• Nvidia GPU driver: 551.23
• Antivirus and firewall software: [e.g. Windows Defender and Windows Firewall]

Moonlight Logs (please attach)
Moonlight-1706743711.log

Crash dump:
Moonlight-1706743310.dmp

[cgutman]

I see Nvidia's driver (nvwgf2umx.dll) is crashing in the crash dump:

0:066> .ecxr
rax=0000000000000000 rbx=000002a2cd6b7c80 rcx=000002a2cd6b7c80
rdx=000002a2cbbe9990 rsi=000002a2cbbe43a0 rdi=0000000000000000
rip=00007ff8e71b7014 rsp=000000a69de1f630 rbp=000002a2cbbe9990
 r8=000002a2cbbe43a0  r9=0000000000000000 r10=0000000000000001
r11=0000064af4c37a17 r12=0000000000000000 r13=0000000000000000
r14=000002a2cbbe43a0 r15=0000000000000000
iopl=0         nv up ei pl nz na po nc
cs=0033  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010206
nvwgf2umx+0x18a7014:
00007ff8`e71b7014 8b888c000000    mov     ecx,dword ptr [rax+8Ch] ds:00000000`0000008c=????????

I also noted that a hook (graphics_hook64.dll) has been loaded into Moonlight, which we do not support. It appears to be part of OBS. I suggest disabling this to see if it resovles the issue.

In the past, driver/hook issues like this have been dependent on the window mode of the stream. Full-screen would be most likely to trigger issues, while windowed and borderless windowed tend to be fine. I suggest trying borderless windowed mode or windowed mode to see if either of those make the issue go away.

[xCISACx]

OBS is closed and I can't find it running through the Task Manager either.
Where would I be able to find this hook?
The only recording software I am running is Steelseries Moments. Could that be the culprit?
I'll try Borderless then, thanks!

[xCISACx]

It's in Borderless now and it still crashes. Less often but it still does.