[Bug c++/61370] decltype, enable_if, previous arguments

[patrick.a.moran at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61370

--- Comment #4 from Patrick Moran <patrick.a.moran at gmail dot com> ---
This bug does indeed seem to be related to / duplicate of c++/52830.  That is,
the two bugs reports are referring to the same trigger, but the bug manifests
differently in the two versions (in the 4.9.0 I tested, I got this error, in
the 4.8.0 it tested they got ICE).  When I built c++/52830's test case with
4.9.0, I got this error message.

A bit unsure of the ettiquette here - as the original reporter is it
appropriate for me to go ahead and mark this ticket dup?