--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/ext/attr-nonnull.C	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,31 @@
+// Bug c++/83871 - wrong code due to attributes on distinct template
+// specializations
+// Test to verify that an explicit function template specifialization
+// does not "inherit" attribute nonnull from an argument declared with
+// one in the primary template.
+// { dg-do compile }
+// { dg-options "-O -Wall" }
+
+template <class T>
+void __attribute__ ((nonnull (1)))
+f (T*, T*, T*);
+
+template <>
+void
+f<int>(int*, int*, int*);     // { dg-warning "may be missing attributes" }
+
+template <>
+void __attribute__ ((nonnull (3)))
+f<float>(float*, float*, float*);
+
+
+void test_nonnull (void)
+{
+  f<void>(0, 0, 0);           // { dg-warning "null argument where non-null required \\\(argument 1\\\)" }
+
+  f<int>(0, 0, 0);            // { dg-bogus "null argument" }
+
+  f<float>(0, 0, 0);
+  // { dg-bogus "null argument where non-null required \\\(argument 1\\\)" "" { target *-*-* } .-1 }
+  // { dg-warning "null argument where non-null required \\\(argument 3\\\)" "" { target *-*-* } .-2 }
+}