Version Used:

Reproduces in the following versions:

2.10
3.1.1
3.2.1
3.3.0-beta2-final

Steps to Reproduce:

1. Download: RefoutBug.zip
2. Compile the assembly using csc.exe @RefoutBug.rsp /noconfig
3. Unhandled Exception error is emitting. See full exception stack trace in UnhandledException.txt

The unhandled exception is not thrown when removing /refout:"ref-Unity.Postprocessing.Runtime.dll" from RefoutBug.rsp

Expected Behavior:
No exception is thrown and the reference assembly is created.

Actual Behavior:
Exception is thrown and the reference assembly is not created.