Fortran: a symbol in a COMMON cannot be a coarray

gcc/fortran/ChangeLog:

	PR fortran/69419
	* match.c (gfc_match_common): Check array spec of a symbol in a
	COMMON object list and reject it if it is a coarray.

gcc/testsuite/ChangeLog:

	PR fortran/69419
	* gfortran.dg/pr69419.f90: New test.

diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 53a575e616e..df97620634d 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -5314,6 +5314,13 @@ gfc_match_common (void)
 		  goto cleanup;
 		}

+	      if (as->corank)
+		{
+		  gfc_error ("Symbol %qs in COMMON at %C cannot be a "
+			     "coarray", sym->name);
+		  goto cleanup;
+		}
+
 	      if (!gfc_add_dimension (&sym->attr, sym->name, NULL))
 		goto cleanup;

diff --git a/gcc/testsuite/gfortran.dg/pr69419.f90 b/gcc/testsuite/gfortran.dg/pr69419.f90
new file mode 100644
index 00000000000..7329808611c
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr69419.f90
@@ -0,0 +1,9 @@
+! { dg-do compile }
+! { dg-options "-fcoarray=lib" }
+! PR fortran/69419 - ICE on invalid coarray in common
+
+blockdata b
+   real x           ! { dg-error "must be in COMMON" }
+   common /c/ x[*]  ! { dg-error "cannot be a coarray" }
+   data x /1.0/
+end