Casting double to ulong weirdness

[deadalnix via Digitalmars-d]

On Monday, 24 August 2015 at 16:52:54 UTC, Márcio Martins wrote:
> I'm posting this here for visibility. This was silently 
> corrupting our data, and might be doing the same for others as 
> well.
>
> import std.stdio;
> void main() {
>   double x = 1.2;
>   writeln(cast(ulong)(x * 10.0));
>   double y = 1.2 * 10.0;
>   writeln(cast(ulong)y);
> }
>
> Output:
> 11
> 12
>
>
> to!ulong instead of the cast does the right thing, and is a 
> viable work-around.
>
> Issue: https://issues.dlang.org/show_bug.cgi?id=14958)

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