Not a large file...
but I do directory compare to compare difference files within 2 directories.
Then double-clicking the differences files, windows will load for a few miliseconds and before it loads, I pressed CTRL+A. It crashes.
Edit:
(Sorry for double-post)
I think this can only be reproduced by some OS version. I have sensitive windows that will crash even if it small bugs in our application (eg. accessing invalid memory pointer - don't remember)...
Here I created dump files by using Windows Task Manager, hope it will helps you analyze the problem.
DiffMerge Dump