Dear all,

the attached patch introduces error recovery for two cases of using
an invalid array in a declaration of an implied-shape array instead
of hitting internal errors.

Initial patch by Steve.  The final version was approved in the PR
by Steve.

Committed as:

https://gcc.gnu.org/g:748f8a8b145dde59c7b63aa68b5a59515b7efc49

Thanks,
Harald