[Fortran] Fix column of %C diagnostic location

        gcc/fortran/
        * error (error_print, gfc_format_decoder): Fix off-by one issue with %C.

        gcc/testsuite/
        * gfortran.dg/use_without_only_1.f90: Update column num in dg-warning.

From-SVN: r276567

gcc/fortran/ChangeLog

+2019-10-04  Tobias Burnus  <tobias@codesourcery.com>
+
+	* error (error_print, gfc_format_decoder): Fix off-by one issue with %C.
+
 2019-10-03  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/91497
@@ -91,7 +95,7 @@
 
 2019-10-01  Jan Hubicka  <jh@suse.cz>
 
-	* module.c (load_commons): Initialize flags to 0 to silecne
+	* module.c (load_commons): Initialize flags to 0 to silence
 	-Wmaybe-uninitialized warning.
 	(read_module): Likewise for n and comp_name.
 

gcc/fortran/error.c

@@ -618,12 +618,18 @@ error_print (const char *type, const char *format0, va_list argp)
 	      {
 		l2 = loc;
 		arg[pos].u.stringval = "(2)";
+		/* Point %C first offending character not the last good one. */
+		if (arg[pos].type == TYPE_CURRENTLOC)
+		  l2->nextc++;
 	      }
 	    else
 	      {
 		l1 = loc;
 		have_l1 = 1;
 		arg[pos].u.stringval = "(1)";
+		/* Point %C first offending character not the last good one. */
+		if (arg[pos].type == TYPE_CURRENTLOC)
+		  l1->nextc++;
 	      }
 	    break;
 
@@ -963,6 +969,9 @@ gfc_format_decoder (pretty_printer *pp, text_info *text, const char *spec,
 	  loc = va_arg (*text->args_ptr, locus *);
 	gcc_assert (loc->nextc - loc->lb->line >= 0);
 	unsigned int offset = loc->nextc - loc->lb->line;
+	if (*spec == 'C')
+	  /* Point %C first offending character not the last good one. */
+	  offset++;
 	/* If location[0] != UNKNOWN_LOCATION means that we already
 	   processed one of %C/%L.  */
 	int loc_num = text->get_location (0) == UNKNOWN_LOCATION ? 0 : 1;
@@ -1401,7 +1410,7 @@ gfc_internal_error (const char *gmsgid, ...)
 void
 gfc_clear_error (void)
 {
-  error_buffer.flag = 0;
+  error_buffer.flag = false;
   warnings_not_errors = false;
   gfc_clear_pp_buffer (pp_error_buffer);
 }

gcc/testsuite/ChangeLog

+2019-10-04  Tobias Burnus  <tobias@codesourcery.com>
+
+	* gfortran.dg/use_without_only_1.f90: Update column num in dg-warning.
+
 2019-10-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/71504

gcc/testsuite/gfortran.dg/use_without_only_1.f90

@@ -6,16 +6,16 @@ MODULE foo
 END MODULE
 
 MODULE testmod
-  USE foo ! { dg-warning "6:has no ONLY qualifier" }
+  USE foo ! { dg-warning "7:has no ONLY qualifier" }
   IMPLICIT NONE
 CONTAINS
   SUBROUTINE S1
-     USE foo ! { dg-warning "9:has no ONLY qualifier" }
+     USE foo ! { dg-warning "10:has no ONLY qualifier" }
   END SUBROUTINE S1
   SUBROUTINE S2
      USE foo, ONLY: bar 
   END SUBROUTINE
   SUBROUTINE S3
-     USE ISO_C_BINDING ! { dg-warning "9:has no ONLY qualifier" }
+     USE ISO_C_BINDING ! { dg-warning "10:has no ONLY qualifier" }
   END SUBROUTINE S3
 END MODULE