mono/mono — pull request #959 by NN--- (2014-03-16 21:09:03+00:00)
Title: Do not crash if path is specified

AssemblyBuilder is not a good class for doing that but simply taking only the file name covers most cases.
The best solution is to rewrite this tool using Mono.Cecil.

FYI AL.exe from .NET is not written in managed because of the SRE limitation