2 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b508745..8a376ff 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-11-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/83020
+	* g++.dg/cpp1z/pr83020.C: New.
+
 2017-11-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/82880
diff --git a/gcc/testsuite/g++.dg/cpp1z/pr83020.C b/gcc/testsuite/g++.dg/cpp1z/pr83020.C
new file mode 100644
index 0000000..43a7e38
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/pr83020.C
@@ -0,0 +1,16 @@
+// PR c++/83020
+// { dg-options -std=c++17 }
+
+struct NoDefault {
+    int val = 1234;
+    NoDefault(int v) : val(v) {}
+};
+template <class T>
+struct Whoops {
+    const char *str;
+    T obj;
+    Whoops(const char *s, T v = T()) : str(s), obj(v) {}  // { dg-error "no matching" }
+};
+const char *test() {
+    return Whoops<NoDefault>("hi").str;
+}