Do not throw when printing value that cannot be coerced to primitive (immutable-js#1334)

leebyron · web-flow · commit a91db8f8e7d7 · 2017-10-04T16:38:22.000-07:00
Fixes immutable-js#1252
diff --git a/__tests__/issues.ts b/__tests__/issues.ts
@@ -77,3 +77,9 @@ describe('Issue #1247', () => {
     expect(r.wasAltered()).toBe(false);
   });
 });
+
+describe('Issue #1252', () => {
+  const prototypelessObj = Object.create(null);
+  const list = List([prototypelessObj]);
+  expect(list.toString()).toBe('List [ {} ]');
+});
diff --git a/src/utils/quoteString.js b/src/utils/quoteString.js
@@ -9,5 +9,9 @@
  * Converts a value to a string, adding quotes if a string was provided.
  */
 export default function quoteString(value) {
-  return typeof value === 'string' ? JSON.stringify(value) : String(value);
+  try {
+    return typeof value === 'string' ? JSON.stringify(value) : String(value);
+  } catch (_ignoreError) {
+    return JSON.stringify(value);
+  }
 }
