https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68763

--- Comment #21 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sun Jan 31 14:53:26 2016
New Revision: 233020

URL: https://gcc.gnu.org/viewcvs?rev=233020&root=gcc&view=rev
Log:
        PR c++/68763

        * tree.c (strip_typedefs) [FUNCTION_TYPE]: Avoid building a new
        function type if nothing is changing.

Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/tree.c

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