1 files changed, 12 insertions, 5 deletions
diff --git a/lib/internal/util/inspect.js b/lib/internal/util/inspect.js
index 39cbfd36b7..2f922f6659 100644
--- a/lib/internal/util/inspect.js
+++ b/lib/internal/util/inspect.js
@@ -1542,11 +1542,6 @@ function reduceToSingleString(
   return `${braces[0]}${ln}${join(output, `,\n${indentation}  `)} ${braces[1]}`;
 }
 
-function format(...args) {
-  return formatWithOptions(undefined, ...args);
-}
-
-
 const firstErrorLine = (error) => error.message.split('\n')[0];
 let CIRCULAR_ERROR_MESSAGE;
 function tryStringify(arg) {
@@ -1569,7 +1564,19 @@ function tryStringify(arg) {
   }
 }
 
+function format(...args) {
+  return formatWithOptionsInternal(undefined, ...args);
+}
+
 function formatWithOptions(inspectOptions, ...args) {
+  if (typeof inspectOptions !== 'object' || inspectOptions === null) {
+    throw new ERR_INVALID_ARG_TYPE(
+      'inspectOptions', 'object', inspectOptions);
+  }
+  return formatWithOptionsInternal(inspectOptions, ...args);
+}
+
+function formatWithOptionsInternal(inspectOptions, ...args) {
   const first = args[0];
   let a = 0;
   let str = '';