util: escape symbol and non-enumerable keys

These keys require escaping as they might also contain line breaks
and other special characters.

PR-URL: #22300
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

lib/util.js

@@ -1208,9 +1208,10 @@ function formatProperty(ctx, value, recurseTimes, key, array) {
     return str;
   }
   if (typeof key === 'symbol') {
-    name = `[${ctx.stylize(key.toString(), 'symbol')}]`;
+    const tmp = key.toString().replace(strEscapeSequencesReplacer, escapeFn);
+    name = `[${ctx.stylize(tmp, 'symbol')}]`;
   } else if (desc.enumerable === false) {
-    name = `[${key}]`;
+    name = `[${key.replace(strEscapeSequencesReplacer, escapeFn)}]`;
   } else if (keyStrRegExp.test(key)) {
     name = ctx.stylize(key, 'name');
   } else {

test/parallel/test-util-inspect.js

@@ -890,22 +890,22 @@ if (typeof Symbol !== 'undefined') {
   const options = { showHidden: true };
   let subject = {};
 
-  subject[Symbol('symbol')] = 42;
+  subject[Symbol('sym\nbol')] = 42;
 
-  assert.strictEqual(util.inspect(subject), '{ [Symbol(symbol)]: 42 }');
+  assert.strictEqual(util.inspect(subject), '{ [Symbol(sym\\nbol)]: 42 }');
   assert.strictEqual(
     util.inspect(subject, options),
-    '{ [Symbol(symbol)]: 42 }'
+    '{ [Symbol(sym\\nbol)]: 42 }'
   );
 
   Object.defineProperty(
     subject,
     Symbol(),
     { enumerable: false, value: 'non-enum' });
-  assert.strictEqual(util.inspect(subject), '{ [Symbol(symbol)]: 42 }');
+  assert.strictEqual(util.inspect(subject), '{ [Symbol(sym\\nbol)]: 42 }');
   assert.strictEqual(
     util.inspect(subject, options),
-    "{ [Symbol(symbol)]: 42, [Symbol()]: 'non-enum' }"
+    "{ [Symbol(sym\\nbol)]: 42, [Symbol()]: 'non-enum' }"
   );
 
   subject = [1, 2, 3];
@@ -1678,3 +1678,13 @@ util.inspect(process);
 assert.strictEqual(inspect(1n), '1n');
 assert.strictEqual(inspect(Object(-1n)), '[BigInt: -1n]');
 assert.strictEqual(inspect(Object(13n)), '[BigInt: 13n]');
+
+// Verify non-enumerable keys get escaped.
+{
+  const obj = {};
+  Object.defineProperty(obj, 'Non\nenumerable\tkey', { value: true });
+  assert.strictEqual(
+    util.inspect(obj, { showHidden: true }),
+    '{ [Non\\nenumerable\\tkey]: true }'
+  );
+}