On: Major standard library changes in Go 1.20

[nraynaud]

I think arenas could solve a weird need I sometimes have, the ability to say: “from now one this object should have no references” as a debugging tool.

[nemo1618 → nraynaud]

You might be able to use https://pkg.go.dev/runtime#SetFinalizer for that.

Another option is https://pkg.go.dev/lukechampine.com/freeze -- not exactly what you want, but if the object is mutated after freezing, it will panic.