diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index 41e3a4bb78f57d5f4eadf9f53d9053afdd98633c..a51f5add7dfdbbb86b5202be8f56fc3b71e79892 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -5671,7 +5671,6 @@ static bool isPipeDeclerator(const Declarator &D) {
 }
 
 bool Parser::IsBSCMethodAmbiguous() {
-  assert(NextToken().isNot(tok::eof));
   if (GetLookAheadToken(2).isNot(tok::coloncolon)) {
     bool FlagUnsigned = (Tok.is(tok::kw_unsigned) &&
                          NextToken().isOneOf(tok::kw_int, tok::kw_short,
diff --git a/clang/test/BSC/Method/Struct/struct_error_function_definition.cbs b/clang/test/BSC/Method/Struct/struct_error_function_definition.cbs
new file mode 100644
index 0000000000000000000000000000000000000000..a02ac305ffaf6946d4ef6fabb4709b7f8e592a1b
--- /dev/null
+++ b/clang/test/BSC/Method/Struct/struct_error_function_definition.cbs
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 -verify %s
+
+struct PollResult_int {};
+
+struct struct PollResult_int PollResult_int::completed(struct PollResult_int *this, int result) { // expected-error {{declaration of anonymous struct must be a definition}}
+} // expected-error {{expected identifier or '('}}