fix(compiler-core): missing source and have with multiple spaces should emit error during compiler

Author: hchlq

packages/compiler-core/__tests__/transforms/vFor.spec.ts

@@ -253,6 +253,18 @@ describe('compiler: v-for', () => {
       )
     })
 
+    test('missing source and have multiple spaces with', () => {
+      const onError = vi.fn()
+      parseWithForTransform('<span v-for="item in  " />', { onError })
+
+      expect(onError).toHaveBeenCalledTimes(1)
+      expect(onError).toHaveBeenCalledWith(
+        expect.objectContaining({
+          code: ErrorCodes.X_V_FOR_MALFORMED_EXPRESSION
+        })
+      )
+    })
+
     test('missing value', () => {
       const onError = vi.fn()
       parseWithForTransform('<span v-for="in items" />', { onError })

packages/compiler-core/src/utils.ts

@@ -499,4 +499,4 @@ export function getMemoedVNodeCall(node: BlockCodegenNode | MemoExpression) {
   }
 }
 
-export const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/
+export const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+(\S[\s\S]*)/