fix(compiler-sfc): improve css v-bind parsing

fix #6022

packages/compiler-sfc/__tests__/cssVars.spec.ts

@@ -1,4 +1,4 @@
-import { compileStyle } from '../src'
+import { compileStyle, parse } from '../src'
 import { mockId, compileSFCScript, assertCode } from './utils'
 
 describe('CSS vars injection', () => {
@@ -231,5 +231,21 @@ describe('CSS vars injection', () => {
 })`)
       assertCode(content)
     })
+
+    // #6022
+    test('should be able to parse incomplete expressions', () => {
+      const {
+        descriptor: { cssVars }
+      } = parse(
+        `<script setup>let xxx = 1</script>
+        <style scoped>
+        label {
+          font-weight: v-bind("count.toString(");
+          font-weight: v-bind(xxx);
+        }
+        </style>`
+      )
+      expect(cssVars).toMatchObject([`count.toString(`, `xxx`])
+    })
   })
 })