[Issue 23685] New: Confusing error with mutual imports

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23685

          Issue ID: 23685
           Summary: Confusing error with mutual imports
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: john.loughran.colvin at gmail.com

$ cat a.d
import b : bSym;
$ cat b.d
import a;
$ dmd -o- a.d
a.d(1): Error: module `b` import `bSym` not found, did you mean alias `a.bSym`?


This is one of those "wtf" moments for users. What alias? I reckon it's because
of the implementation of selective import lowering to aliases, but that's an
internal detail that shouldn't be leaking to users.

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