[Bug c++/78896] [C++17] Segmentation fault occurs when use variable initialized using structured binding with capture-by-ref lambda

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78896

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Jason, any thoughts on this?  Shall we just disallow lambdas in
> decompositions?  Shall the standard say anything about those?

Yes, the standard should probably explicitly prohibit this.  We definitely
should.