fsharp/FSharp.Compiler.Service — pull request #23 by eiriktsarpalis (2014-01-15 13:10:35+00:00)
Title: Fix fsc corrupting assemblies when generating pdb files

Fixes a bug that was introduced in d32feca1169a00d50bcc81b9f30e3f07134d062b.

Pertains to the change in ilwrite.fs line 4546. Produced assembly is reopened with `FileMode.Create`.

Fixed by adding a new method to the `IFileSystem` interface.