[Bug fortran/78033] Internal Compiler Error in enforce_single_undo_checkpoint

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78033

--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Patch posted at 
>
> https://gcc.gnu.org/ml/fortran/2016-10/msg00156.html

The patch regtested fine but for

FAIL: gfortran.dg/gomp/udr3.f90   -O   (test for errors, line 16)
FAIL: gfortran.dg/gomp/udr3.f90   -O  (test for excess errors)

Running the test manually I see

...
/opt/gcc/work/gcc/testsuite/gfortran.dg/gomp/udr3.f90:16:6:

 !$omp declare reduction (baz:integer,real,integer & ! { dg-error "Redefinition
of !.OMP DECLARE REDUCTION|Previous" }
      1
Error: Unclassifiable OpenMP directive at (1)
...

i.e., the error no longer matches the regexp.