shouldn't this code at least trigger a warning?

[via Digitalmars-d-learn]

On Wednesday, 29 April 2015 at 06:37:44 UTC, ketmar wrote:
> subj. the code:
>
>   void main () {
>     import std.stdio;
>     char ch = '!';
>     switch (ch) {
>       int n = 42;
>       case '!': writeln(n, ": wow!"); break;
>       default:
>     }
>   }
>
>
> i think that such abomination should:
> 1. be forbidden, or
> 2. trigger a warning, or
> 3. execute initializer anyway.
>
> currently the code is allowed, no warnings triggered, yet `n` is
> uninitialized. and having uninitialized variable without 
> "=void" "should
> not be".

Agreed, this should be an error. Variables declared in one case 
block aren't even visible in other case blocks, this was probably 
an oversight.