Compiler should hint to user to deref when doing reference assignment #33570
Description
fn change_opt(opt: &mut Option<String>){ opt = None }<anon>:2:11: 2:15 error: mismatched types: expected `&mut core::option::Option<collections::string::String>`, found `core::option::Option<_>` (expected &-ptr, found enum `core::option::Option`) [E0308] <anon>:2 opt = None ^~~~ <anon>:2:11: 2:15 help: see the detailed explanation for E0308 error: aborting due to previous error It'd be great if this had a hint:
Did you mean `*opt = None` Someone on IRC just ran into this.