Error when v-model is used on scope variable

Editor assessment

The header `feat(compiler-core/v-model): error when v-model is used on scope variable` states the changed behavior directly, so a reader grasps what was fixed and where without consulting the diff. The `feat` type is accurate and the compound scope `compiler-core/v-model` pinpoints the affected sub-area. No body or footer is required for a change of this size. Style is clean: imperative mood, no trailing period, and a subject well within a sensible length. A body explaining the underlying cause would make this fully instructive, but for a contained change the omission is acceptable, leaving a clear, correct, publishable message.