don't throw in noexcept function

Summary:
`throw` within a `noexcept` function triggers a compiler warning on the latest clang in C++17 mode.

As the behavior of uncaught `throw` within a `noexcept` context is to terminate the program, do so explicitly.

Reviewed By: yfeldblum

Differential Revision: D8651221

fbshipit-source-id: 004c4c132ad9b5b873a92cf2710b9d1ebe4e705b

folly/Function.h

@@ -227,6 +227,7 @@
 #include <folly/Portability.h>
 #include <folly/Traits.h>
 #include <folly/functional/Invoke.h>
+#include <folly/lang/Exception.h>
 
 namespace folly {
 
@@ -414,7 +415,7 @@ struct FunctionTraits<ReturnType(Args...) noexcept> {
   }
 
   static ReturnType uninitCall(Data&, Args&&...) noexcept {
-    throw std::bad_function_call();
+    terminate_with<std::bad_function_call>();
   }
 
   ReturnType operator()(Args... args) noexcept {