checking both v-model and v-bind:value used on same element conflicts with customizing component v-model

Version

2.5.5

Reproduction link

https://github.com/VdustR/vue-issue-7084

Steps to reproduce

# install dependencies
npm install

# serve with hot reload at localhost:8080
npm run dev

What is expected?

Compiled successfully.

What is actually happening?

Got error:

 - :value conflicts with v-model on the same element because the latter already expands to a value binding internally

---

The new improvements from v2.5.5

warn if both v-model and v-bind:value are used on same element

conflicts with Customizing Component v-model.

Downgrade the vue(vue-template-compiler exactly) in the reproduction to 2.5.4 and it will be compiled successfully.

BTW, Production vue.js works fine -> CodePen

• vue#7084
• vue-material#1167