https://issues.dlang.org/show_bug.cgi?id=12546

--- Comment #1 from Tomer Filiba <tomerfiliba@gmail.com> ---
Further examination shows that it's caused by the automatic addition of function attributes:

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$ nm mymodule.o | grep TypedIdentifier | grep toString
_D8mymodule40__T15TypedIdentifierVAyaa6_4d7954797065Z15TypedIdentifier8toStringMxFNaNfZAya

$ nm main.o | grep TypedIdentifier | grep toString _D8mymodule40__T15TypedIdentifierVAyaa6_4d7954797065Z15TypedIdentifier8toStringMxFZAya =================================

NaNf = pure @safe (according to http://dlang.org/abi.html )

When the `alias` sits in mymodule.d, toString gets qualified with `pure @safe`, while when it's invoked in main.d, it only looks for `const`. If I move the alias into main.d, or just skip the alias and use the full type, everything's fine.

This seems like a bug in the alias mechanism of the core compiler.

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https://issues.dlang.org/show_bug.cgi?id=12546

Rainer Schuetze <r.sagitario@gmx.de> changed:

           What    |Removed                     |Added
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                 CC|                            |r.sagitario@gmx.de

--- Comment #2 from Rainer Schuetze <r.sagitario@gmx.de> ---
I guess this is another instance of Issue 10442.

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https://issues.dlang.org/show_bug.cgi?id=12546

John Colvin <john.loughran.colvin@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |john.loughran.colvin@gmail.
                   |                            |com

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