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-rw-r--r--lib/AST/NestedNameSpecifier.cpp1
-rw-r--r--test/SemaCXX/rdar42746401.cpp7
2 files changed, 8 insertions, 0 deletions
diff --git a/lib/AST/NestedNameSpecifier.cpp b/lib/AST/NestedNameSpecifier.cpp
index a514d57b6b..df23972af2 100644
--- a/lib/AST/NestedNameSpecifier.cpp
+++ b/lib/AST/NestedNameSpecifier.cpp
@@ -547,6 +547,7 @@ operator=(const NestedNameSpecifierLocBuilder &Other) {
}
// Deep copy.
+ BufferSize = 0;
Append(Other.Buffer, Other.Buffer + Other.BufferSize, Buffer, BufferSize,
BufferCapacity);
return *this;
diff --git a/test/SemaCXX/rdar42746401.cpp b/test/SemaCXX/rdar42746401.cpp
new file mode 100644
index 0000000000..ff9dff456c
--- /dev/null
+++ b/test/SemaCXX/rdar42746401.cpp
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+template <int>
+class b;
+class c; // expected-note{{forward declaration}}
+
+::b<0> struct c::d // expected-error{{incomplete type}} expected-error{{cannot combine}} expected-error{{expected unqualified-id}}