[RFC] ICE when error_mark_node is gimplified

[Andrew Pinski]

Hi,
  PR 68948 shows a case which has been broken for a long time and very
hard to see.  So I am recommending that we introduce an assert inside
the gimplifier if we process an error_mark_node and there was no
errors or sorrys from the front-end; I will send a patch if there is a
general feeling that it is a good idea.

Good idea or bad idea?  This will prevent cases like PR 68948 from
happening and make it easier to understand why the wrong code is
happening.

Thanks,
Andrew