Set operation on key "value" failed: target is readonly always warned with useTemplateRef

[Cherry]

Vue version

3.5.0

Link to minimal reproduction

https://stackblitz.com/edit/vitejs-vite-whst6h?file=src%2Fcomponents%2FHelloWorld.vue

Steps to reproduce

• open Stackblitz URL
• wait for build
• open dev tools
• observe the following warning:
  [Vue warn] Set operation on key "value" failed: target is readonly. RefImpl {dep: Dep, __v_isRef: true, __v_isShallow: true, _rawValue: input, _value: input}
• changing the value in the input triggers the warning again

What is expected?

No warning to be logged

What is actually happening?

Unexpected warning is being logged

System Info

via StackBlitz:

  System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vue: ^3.5.0 => 3.5.0 

[jh-leong]

Workaround: Avoid naming a variable declared with useTemplateRef the same as a template ref: Playground

[edison1105]

@jh-leong I think this is an edge case, maybe we can show a warning at compile time