n-api: correct bug in napi_get_last_error

napi_get_last_error returns incorrect napi_status.

Backport-PR-URL: #30532
PR-URL: #28702
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Author: Octavian Soldea

src/node_api.cc

@@ -1407,14 +1407,16 @@ napi_status napi_get_last_error_info(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, result);
 
-  // you must update this assert to reference the last message
-  // in the napi_status enum each time a new error message is added.
+  // The value of the constant below must be updated to reference the last
+  // message in the `napi_status` enum each time a new error message is added.
   // We don't have a napi_status_last as this would result in an ABI
   // change each time a message was added.
+  const int last_status = napi_date_expected;
+
   static_assert(
-      node::arraysize(error_messages) == napi_date_expected + 1,
+      node::arraysize(error_messages) == last_status + 1,
       "Count of error messages must match count of error values");
-  CHECK_LE(env->last_error.error_code, napi_callback_scope_mismatch);
+  CHECK_LE(env->last_error.error_code, last_status);
 
   // Wait until someone requests the last error information to fetch the error
   // message string

src/node_api_types.h

@@ -84,6 +84,10 @@ typedef enum {
   napi_bigint_expected,
   napi_date_expected,
 } napi_status;
+// Note: when adding a new enum value to `napi_status`, please also update
+// `const int last_status` in `napi_get_last_error_info()' definition,
+// in file js_native_api_v8.cc. Please also update the definition of
+// `napi_status` in doc/api/n-api.md to reflect the newly added value(s).
 
 #if NAPI_VERSION >= 4
 typedef enum {