String access by index, got constant definition loop

[ii64]

The following program sample.go triggers an unexpected result

package main

func main() {
	m := "asdf"
	j := m[0]
	println(j)
}

Expected result

$ go run j.go
97

Got

$ yaegi ./j.go
97

Yaegi Version

devel

Additional Notes

However it break if you try to run it on REPL.

$ yaegi
> s := "abc"
: abc
> p := s[0]
1:28: constant definition loop
>

$ yaegi
> var k = "asdf" 
: 0xc0004840f0
> var m = k[0]
1:18: constant definition loop
> 

[clarkmcc]

I've seen this error in seemingly unrelated issues. I'd love to know more about the root cause of this message for my own edification.

[ii64]

I was testing a piece of function, I had to declare (literally copied from Go file):

var (
	l = "asdf"
	m = l[0]
)

Expecting that yaegi REPL will declare these variables, but it looks like they treated as a constant declaration.