call.c (convert_like_real): Call print_z_candidate and inform only if permerror returns true.

2014-07-15  Paolo Carlini  <paolo.carlini@oracle.com>

	* call.c (convert_like_real): Call print_z_candidate and inform only
	if permerror returns true.

From-SVN: r212560

gcc/cp/ChangeLog

+2014-07-15  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* call.c (convert_like_real): Call print_z_candidate and inform only
+	if permerror returns true.
+
 2014-07-14  Jan Hubicka  <hubicka@ucw.cz>
 
 	* class.c (build_clone): Do not clear assembler names of

gcc/cp/call.c

@@ -6076,8 +6076,10 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
 	{
 	  if (t->kind == ck_user && t->cand->reason)
 	    {
-	      permerror (loc, "invalid user-defined conversion "
-			 "from %qT to %qT", TREE_TYPE (expr), totype);
+	      complained = permerror (loc, "invalid user-defined conversion "
+				      "from %qT to %qT", TREE_TYPE (expr),
+				      totype);
+	      if (complained)
 		print_z_candidate (loc, "candidate is:", t->cand);
 	      expr = convert_like_real (t, expr, fn, argnum, 1,
 					/*issue_conversion_warnings=*/false,
@@ -6089,7 +6091,7 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
 					     complain);
 	      else
 		expr = cp_convert (totype, expr, complain);
-	      if (fn)
+	      if (complained && fn)
 		inform (DECL_SOURCE_LOCATION (fn),
 			"  initializing argument %P of %qD", argnum, fn);
 	      return expr;