StackWalkAndDump hangs the program for 2 mins on PC Dev build

When a ensure fail hit in PC Dev build, the program may hangs for more than 1 min, 2 min. it seems to load and parse the PDB is to slow.

I know the failure of the assertion leads to a logic bug to fix. However, in terms of the ensure itself, how about make the 176s StackWalkAndDump in ensure’s FDebug::EnsureFailed to another work thread, AsyncTask it?