lang/ldc fails to compile multiple source files

[Jeremy Baxter]

Hi list,

Supplying multiple sources at ldc's command line with ldc 1.35.0
on -current amd64 fails with a SIGABRT and this message:

    module flag identifiers must be unique (or of 'require' type)
    !"cf-protection-branch"
    LLVM ERROR: Broken module found, compilation aborted!

I can reproduce it by adding `import mod; void main() {}' in one file,
creating mod.d (leaving it empty), and running `ldc2 main.d mod.d'.
This also occurred on 7.4. Is this a known bug or just something on my side?

-- Jeremy