[Issue 12169] sum(int[]) should return a int

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12169



--- Comment #6 from bearophile_hugs at eml.cc 2014-02-18 03:23:57 PST ---
(In reply to comment #1)

> presumably to avoid overflow (which you are
> usually so concerned about, what changed?)


This after very few seconds of run time prints the wrong result
3028092401290448384 instead of 4_294_967_295 * 5_000_000_000 =
21474836475000000000:


struct Uints {
    ulong count;
    bool empty() { return count == 0; }
    void popFront() { count--; }
    uint front() { return uint.max; }
}
void main() {
    import std.stdio, std.algorithm;
    Uints(5_000_000_000).sum.writeln;
}


I think sum() should be changed to return an int before dmd 2.065final is
released.

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