Force haste map regeneration on deserialization error (#5642)

jestjs · Feb 22, 2018 · cdd5dfe · cdd5dfe
1 parent 52bbb26
commit cdd5dfe
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/packages/jest-haste-map/src/index.js b/packages/jest-haste-map/src/index.js
@@ -289,8 +289,13 @@ class HasteMap extends EventEmitter {
    * 1. read data from the cache or create an empty structure.
    */
   read(): InternalHasteMap {
-    // This may throw. `_buildFileMap` will catch it and create a new map.
-    const hasteMap: InternalHasteMap = serializer.readFileSync(this._cachePath);
+    let hasteMap: InternalHasteMap;
+
+    try {
+      hasteMap = serializer.readFileSync(this._cachePath);
+    } catch (err) {
+      hasteMap = this._createEmptyMap();
+    }
 
     for (const key in hasteMap) {
       Object.setPrototypeOf(hasteMap[key], null);