I've been suddenly having crashes on Minecraft very frequently, despite it working fine for many years on this PC and working fine for several month with my current mod configuration. My first crash report is as follows:

https://mclo.gs/xsIoBvv

After some googling, it seemed like the issue might be that there wasn't enough RAM allocated to minecraft, so I figured out how to change that. That got it to run well for about an hour (when it was crashing every 5 minutes or less) until I got this second crash report:

https://mclo.gs/vGsC3Ox