https://issues.dlang.org/show_bug.cgi?id=13593

          Issue ID: 13593
           Summary: object.d hijacked
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: critical
          Priority: P1
         Component: DMD
          Assignee: nobody@puremagic.com
          Reporter: doob@me.com

I have a file named "Object.d", in a directory called "foo". The module name of this file is "foo.Object". As it happens, I'm using OS X which uses a case insensitive file system. I also have another file, say "Bar.d" in "foo", with the module name "foo.Bar". When I try to compile/run Bar.d with rdmd as follows:

rdmd foo/Bar.d

I get a lot of errors like "undefined identifier string" and "undefined identifier size_t" from some modules in druntime and Phobos. If I rename "foo/Object.d" to "foo/Object2.d", leaving the module name as "foo.Object" everything works as expected.

I think the issue is that "rdmd" adds a  flag, "-Ifoo", when running dmd to get the dependencies. But the module system should still prevent it. It seems like the compiler uses the filename instead of the declared module name as the module name.

This is similar to issue 90 [1]. I don't know if we should reopen that one instead.

[1] https://issues.dlang.org/show_bug.cgi?id=90

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