What is 'scope' in function parameter?

[Sobaya]

On Tuesday, 26 December 2017 at 00:17:33 UTC, Mike Franklin wrote:
> After a few hours trying to figure out why the compiler didn't 
> catch this, I finally figured it out.  You have to add `@safe`.
>
> import std.stdio;
>
> int[] x;
>
> void func(scope int[] a) @safe
> {
>     x = a;
> }
>
> void main() @safe {
>     func([0,1,2]);
>     writeln(x);
> }
>
> This is one of the things really ticks me off about D; it has 
> all the wrong defaults.
>
> At a minimum, the documentation needs clarification.  I 
> encourage you to file a  bug report against the documentation 
> at http://issues.dlang.org/
>
> Mike

Oh! Surely adding @safe makes the expected behavior.

According to your advice, I try to post a bug report.

Thanks!

Sobaya