Re: [C++ Patch/RFC] PR 71169 ("[7/8 Regression] ICE on invalid C++ code in pop_nested_class"), PR 71832 and more

[Jason Merrill]

Interesting, that seems like a promising idea.  I'm not sure we need
to do this based on an error in a default template arg, though; can we
drop

+  || error_operand_p (TREE_PURPOSE (parameter)))

?

Jason