[Bug c++/87185] ICE in prune_lambda_captures()

[P at draigBrady dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87185

--- Comment #1 from Pádraig Brady <P at draigBrady dot com> ---
Created attachment 44646
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44646&action=edit
ICE avoidance patch and test case