https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69001
Jakub Jelinek changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed||2015-12-21
CC||jakub at gcc dot gnu.org,
||jason at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek ---
What is going on is that cp_genericize_r first converts changes a by-reference
RESULT_DECL into INDIRECT_REF of it, and then (dunno if because of tree sharing
or some constexpr stuff) at some point that IL is passed again to
cp_genericize_r again and again performs the same change, so we in the end have
two nested INDIRECT_REFs and the types don't match any longer.