I have been working on a plugin that does many transformations. The Execute function runs to completion and dies while exiting with the following error:

fatal error C1001: An internal error has occurred in the compiler.
(compiler file 'd:\enlistments\sdk_march08\src\clients\c2\c2-diagnostics.cpp', line 690)
Access Violation Fault (instruction at "0x305FDDD4" read memory at "0x00000038")

If I debug it in VS it gives the following:

A first chance exception of type 'System.InvalidCastException' occurred in phxd.dll
'cl.exe' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Windows.Forms\2.0.0.0__b77a5c561934e089\System.Windows.Forms.dll'
'cl.exe' (Managed): Loaded 'C:\WINDOWS\assembly\GAC_MSIL\System.Drawing\2.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll'
The program '[1288] cl.exe: Managed' has exited with code 1 (0x1).

I would be more than happy to attach files and binaries to aid in debugging this issue, but I don't know what needs to be generated.