Debugging crash.dmp

Does anyone know the correct steps to debug a Unity crash dump from a build? I can open the crash.dmp in Visual Studio, and I have a relevant development build with a .pdb, but I can't get them to link as valid.

I suspect it's because the crash occurred in a release build and the pbd is generated from the development build, but then why does a crash.dmp get generated at all in non-dev builds? I'm a bit confused here.