[Bug c++/123670] [14/15/16/17 Regression] ICE (Segmentation fault) in constraints_satisfied_p with lambda requires clause referencing captured local lambda since r13-980

[mpolacek at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123670

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
#c2 can be fixed by

+++ b/gcc/cp/pt.cc
@@ -11122,6 +11122,8 @@ for_each_template_parm_r (tree *tp, int *walk_subtrees,
void *d)
     case VAR_DECL:
       if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t))
    WALK_SUBTREE (DECL_TI_ARGS (t));
+      if (DECL_CONTEXT (t) && pfd->include_nondeduced_p)
+   WALK_SUBTREE (DECL_CONTEXT (t));
       break;

     case PARM_DECL:

which fixes the original crash too, but that test should be accepted; with this
patch it errors.

Along with bug 127799, there are probably 3 different issues.