'System.StackOverflowException' in EntityFramework.dll without code reference or stacktrace

While other questions here on SO always seem to be able to pinpoint which statement causes the StackOverflow Error; my VS gives no code reference.

Message: An unhandled exception of type 'System.StackOverflowException' occurred in EntityFramework.dll

But there is no stacktrace; I just get:

[External Code] 
The maximum number of stack frames supported by Visual Studio has been exceeded.    

No idea where it thrashes; any ideas how I can get Visual Studio 2015 to give me more information? When I click continue, the process just exits.

The program '[13224] iisexpress.exe' has exited with code -2147023895 (0x800703e9).

Any additional help would be appreciated.