re PR fortran/28335 (flush() / write() statement on closed units - error?)

2006-07-30  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/28335
	* file_position.c (st_flush): Add clearer error when UNIT does not
	exist. Add reference to standard in comment.

From-SVN: r115835

libgfortran/ChangeLog

 2006-07-30  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libgfortran/28335
+	* file_position.c (st_flush): Add clearer error when UNIT does not
+	exist. Add reference to standard in comment.
+
+2006-07-30  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libgfortran/28335
 	* close.c (st_close): Revert previous patch and add comment.
 	* file_position.c (st_flush): Revert previous patch and add comment.
 

libgfortran/io/file_pos.c

@@ -340,7 +340,10 @@ st_flush (st_parameter_filepos *fpp)
       flush (u->s);
       unlock_unit (u);
     }
+  else
+    /* FLUSH on unconnected unit is illegal: F95 std., 9.3.5. */ 
+    generate_error (&fpp->common, ERROR_BAD_OPTION,
+			"Specified UNIT in FLUSH is not connected");
 
-  /* CLOSE on unconnected unit is legal and a no-op: F95 std., 9.3.5. */ 
   library_end ();
 }