src,test: Add SIGTRAP to TSFNEx::CallJS

Author: KevinEady

napi-inl.h

@@ -13,6 +13,7 @@
 #include <cstring>
 #include <mutex>
 #include <type_traits>
+#include <csignal>
 
 namespace Napi {
 
@@ -4432,6 +4433,9 @@ template <typename ContextType, typename DataType,
           void (*CallJs)(Napi::Env, Napi::Function, ContextType *, DataType *)>
 void ThreadSafeFunctionEx<ContextType, DataType, CallJs>::CallJsInternal(
     napi_env env, napi_value jsCallback, void *context, void *data) {
+  if (env == nullptr) {
+    raise(SIGTRAP);
+  }
   details::CallJsWrapper<ContextType, DataType, decltype(CallJs), CallJs>(
       env, jsCallback, context, data);
 }