[Bug c++/59759] internal compiler error: in unify, using std::enable_if on classes

[gereon.kremer at cs dot rwth-aachen.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59759

--- Comment #1 from Gereon Kremer <gereon.kremer at cs dot rwth-aachen.de> ---
Created attachment 31800
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31800&action=edit
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