[Bug c++/77914] Wrong lambda definition accepted

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77914

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> Created attachment 40578 [details]
> gcc7-pr77914.patch
> 
> So like this (untested)?

Looks good.