PR c++/89876 - ICE with deprecated conversion.

	* call.c (convert_like_real): Only give warnings with tf_warning.

	* g++.dg/warn/conv5.C: New test.

From-SVN: r270021

gcc/cp/ChangeLog

+2019-03-29  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/89876 - ICE with deprecated conversion.
+	* call.c (convert_like_real): Only give warnings with tf_warning.
+
 2019-03-28  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/89612 - ICE with member friend template with noexcept.

gcc/cp/call.c

@@ -7446,7 +7446,8 @@ convert_like_real (conversion *convs, tree expr, tree fn, int argnum,
 
     case ck_qual:
       /* Warn about deprecated conversion if appropriate.  */
-      string_conv_p (totype, expr, 1);
+      if (complain & tf_warning)
+	string_conv_p (totype, expr, 1);
       break;
 
     case ck_ptr:

gcc/testsuite/ChangeLog

@@ -3,6 +3,9 @@
 	PR c++/89871
 	* g++.dg/cpp2a/desig14.C: New test.
 
+	PR c++/89876 - ICE with deprecated conversion.
+	* g++.dg/warn/conv5.C: New test.
+
 2019-03-29  Martin Liska  <mliska@suse.cz>
 
 	* gcc.dg/ipa/ipa-icf-39.c: Prine '***dbgcnt' output.

gcc/testsuite/g++.dg/warn/conv5.C

+// PR c++/89876
+// { dg-do compile { target c++11 } }
+// { dg-prune-output "sorry" }
+
+template <typename T>
+T f (T, char*);
+
+template <typename T>
+decltype (f (T (), "")) g (T) { return ""; } // { dg-error "invalid conversion" }
+
+void h () { g (0); }