Attached patch fixes this problem by allowing the namespace pointer to
be set correctly regardless of error condition.

Regression tested on x86_64_linux_gnu.

OK for trunk and backports?

Regards,

Jerry

Author: Jerry DeLisle <jvdelisle@gcc.gnu.org>
Date:   Sat Jan 28 20:00:34 2023 -0800

     ICE in gfc_free_namespace. ice-on-invalid.

             PR fortran/103506

     gcc/fortran/ChangeLog:

             * parse.cc (parse_module): Remove use of a bool error value
             that prevented proper setting of the namespace pointer.

     gcc/testsuite/ChangeLog:

             * gfortran.dg/pr103506_1.f90: New test.