diff --git a/clang/lib/StaticAnalyzer/Core/CallEvent.cpp b/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
--- a/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
+++ b/clang/lib/StaticAnalyzer/Core/CallEvent.cpp
@@ -519,7 +519,7 @@
 
     // TODO: Support allocator calls.
     if (Call.getKind() != CE_CXXAllocator)
-      if (Call.isArgumentConstructedDirectly(Idx))
+      if (Call.isArgumentConstructedDirectly(Call.getASTArgumentIndex(Idx)))
         continue;
 
     // TODO: Allocators should receive the correct size and possibly alignment,
diff --git a/clang/test/Analysis/temporaries.cpp b/clang/test/Analysis/temporaries.cpp
--- a/clang/test/Analysis/temporaries.cpp
+++ b/clang/test/Analysis/temporaries.cpp
@@ -1231,3 +1231,19 @@
   return coin ? S() : foo(); // no-warning
 }
 } // namespace return_from_top_frame
+
+#if __cplusplus >= 201103L
+namespace arguments_of_operators {
+struct S {
+  S() {}
+  S(const S &) {}
+};
+
+void test() {
+  int x = 0;
+  auto foo = [](S s, int &y) { y = 1; };
+  foo(S(), x);
+  clang_analyzer_eval(x == 1); // expected-warning{{TRUE}}
+}
+} // namespace arguments_of_operators
+#endif // __cplusplus >= 201103L