https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120123
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[12/13/14/15/16 Regression] |[13 Regression] Implicit
|Implicit this is not used |this is not used in a
|in a requires clause in |requires clause in nested
|nested lambdas |lambdas
--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 12.5/14.4/15.2/16 so far, 13 is currently frozen for the 13.4
release.