[Bug fortran/105243] ICE in next_char, at fortran/io.cc:160

["kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105243

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-05-16
           Priority|P3                          |P4
                 CC|                            |kargl at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from kargl at gcc dot gnu.org ---
This fixes the problem.  Someone that regularly use git will need to commit it.

diff --git a/gcc/fortran/decl.cc b/gcc/fortran/decl.cc
index bd586e75008..6712efd6ec8 100644
--- a/gcc/fortran/decl.cc
+++ b/gcc/fortran/decl.cc
@@ -6283,6 +6283,15 @@ gfc_match_data_decl (void)
       goto cleanup;
     }

+  /* F2018:C708.  */
+  if (current_ts.type == BT_CLASS && current_attr.flavor == FL_PARAMETER)
+    {
+      gfc_error ("CLASS entity at %C shall be a dummy argument or have the "
+                "ALLOCATABLE or POINTER attribute.");
+      m = MATCH_ERROR;
+      goto cleanup;
+    }
+
 ok:
   /* If we have an old-style character declaration, and no new-style
      attribute specifications, then there a comma is optional between