[C++ Patch] PR 86546 (" ICE on invalid: tree_class_check_failed()")

[Nathan Sidwell]

On 08/28/2018 08:43 AM, Paolo Carlini wrote:
> Hi,
> 
> this low priority ICE on invalid happens only in c++98 mode but I think 
> we can as well avoid it and have consistent error recovery across std 
> modes. Essentially, the VAR_DECL for 'b' with erroneous TREE_TYPE (the 
> type is incomplete) reaches cxx_eval_constant_expression and we ICE when 
> we use COMPLETE_TYPE_P on the TREE_TYPE itself. I think we can - 
> consistently across std modes - catch the erroneous type quite a bit 
> earlier, midway in finish_case_label, thus before the case_conversion 
> call which eventually leads to the ICE. Tested x86_64-linux.

ok


-- 
Nathan Sidwell