never!!

jestjs · Feb 11, 2019 · 2e38fd2 · 2e38fd2
1 parent 8a0dded
commit 2e38fd2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/jest-haste-map/src/ModuleMap.ts b/packages/jest-haste-map/src/ModuleMap.ts
@@ -22,7 +22,7 @@ import H from './constants';
 const EMPTY_OBJ = {} as {[key: string]: any};
 const EMPTY_MAP = new Map();
 
-type ValueType<T> = T extends Map<string, infer V> ? V : T;
+type ValueType<T> = T extends Map<string, infer V> ? V : never;
 
 export type SerializableModuleMap = {
   // There is no easier way to extract the type of the entries of a Map