[Bug c++/84455] [8 Regression] ICE in build_call_a at gcc/cp/call.c:389 during error reporting

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84455

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43453
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43453&action=edit
gcc8-pr84455.patch

Untested fix.  This mirrors what cp_parser_lambda_body does.