template | local variable reference in a function is prefixed with _ctx

[lidlanca]

Version

3.2.8

Reproduction link

sfc playground

Steps to reproduce

see bad case in repro link

What is expected?

locally defined variables in a function scope should not be prefixed with _ctx
when referenced inside the scope.

What is actually happening?

a reference to a local variable declared in the function scope is prefixed with _ctx

---

variables defined in the function scope should be treated the same like named arguments

for reference

code is compiled from

  bad <button @click="(msg)=>{
    let a = 'the type is ' + msg.type            
    output = a
    }">
  click
  </button>

to

 _createElementVNode("button", {
      onClick: _cache[1] || (_cache[1] = (msg)=>{
    let a = 'the type is ' + msg.type            
    _isRef(output) ? output.value = _ctx.a : output = a
    })
    }, " click "),

inconsistent prefix usage

_isRef(output) ? output.value = _ctx.a : output = a
there is currently some inconsistency for using a
the usage of a should probably be consistent for both branches of the condition