Fix crash when napi_register_module_v1 returns nullptr (#16816)

test/napi/napi-app/null_addon.cpp

@@ -0,0 +1,48 @@
+#include <js_native_api.h>
+#include <node_api.h>
+
+#define NODE_API_CALL(env, call)                                               \
+  do {                                                                         \
+    napi_status status = (call);                                               \
+    if (status != napi_ok) {                                                   \
+      const napi_extended_error_info *error_info = NULL;                       \
+      napi_get_last_error_info((env), &error_info);                            \
+      const char *err_message = error_info->error_message;                     \
+      bool is_pending;                                                         \
+      napi_is_exception_pending((env), &is_pending);                           \
+      /* If an exception is already pending, don't rethrow it */               \
+      if (!is_pending) {                                                       \
+        const char *message =                                                  \
+            (err_message == NULL) ? "empty error message" : err_message;       \
+        napi_throw_error((env), NULL, message);                                \
+      }                                                                        \
+      return NULL;                                                             \
+    }                                                                          \
+  } while (0)
+
+/* napi_value */ NAPI_MODULE_INIT(/* napi_env env, napi_value exports */) {
+  napi_value number;
+  NODE_API_CALL(env, napi_create_int32(env, 123, &number));
+  NODE_API_CALL(env, napi_set_named_property(env, exports, "number", number));
+
+  // These defines are used by binding.gyp to compile three versions of this
+  // module that return different values
+#if defined(MODULE_INIT_RETURN_NULLPTR)
+  // returning NULL means the exports value should be used as the return value
+  // of require()
+  return NULL;
+#elif defined(MODULE_INIT_RETURN_NULL)
+  napi_value null;
+  NODE_API_CALL(env, napi_get_null(env, &null));
+  return null;
+#elif defined(MODULE_INIT_RETURN_UNDEFINED)
+  napi_value undefined;
+  NODE_API_CALL(env, napi_get_undefined(env, &undefined));
+  return undefined;
+#elif defined(MODULE_INIT_THROW)
+  napi_throw_error(env, "CODE_OOPS", "oops!");
+  return NULL;
+#else
+#error Define one of MODULE_INIT_RETURN_{NULLPTR,NULL,UNDEFINED} to determine what to return from NAPI_MODULE_INIT
+#endif
+}