System Information
This crash happens on both Ubuntu 21.10 and Windows 10. My graphics card is an AMD Radeon RX 580, but Blender 3.0 doesn't recognize it so it's using the CPU.

Blender Version
Broken: Blender 3.0 release version
Worked: 2.93 LTS works fine

Short description of error
When I have a video clip that's too long for prefetch to load, and I track markers, when they hit the first non-prefetched claim Blender unceremoniously closes.

Exact steps for others to reproduce the error

1. Load a clip that's too much for Blender to hold in memory (either load a large clip or lower the Memory Cache Limit in System preferences to something low)
2. Select Set Scene Frames and hit Prefetch. Prefetch will go to a certain frame and stops
3. Set a bunch of tracking markers
4. Track the markers forward for the entire clip
5. When it hits the first un-prefetched frame, Blender closes out

I'm including a blender.crash.txt file created in debug mode on Linux.