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digitalmars.D.bugs - bug in std.algoeithm.sort ?

reply A.M. <AMAMH3 Gmail.com> writes:
import std.string;
import std.array;
import std.algorithm;

void main()
{
        string[] sa = ["TOM","JOE","TOM4","TOM12","TOM6"];
        sort!(comp)(sa);
}
bool comp(string x, string y)
{
        string[] s = [x,y];
        return isSorted(s);
}

this code compiles find, but when run gives the following error:

core.exception.AssertError ./../../src/phobos/std/array.d(210): Attempting to
fetch the front of an empty array

same happens if operating on int not string
I'm using dmd2.030
same happens with dmd2.029

is that a bug?
Jun 04 2009
parent Gide Nwawudu <gide btinternet.com> writes:
On Thu, 04 Jun 2009 07:18:33 -0400, A.M. <AMAMH3 Gmail.com> wrote:

import std.string;
import std.array;
import std.algorithm;

void main()
{
        string[] sa = ["TOM","JOE","TOM4","TOM12","TOM6"];
        sort!(comp)(sa);
}
bool comp(string x, string y)
{
        string[] s = [x,y];
        return isSorted(s);
}

this code compiles find, but when run gives the following error:

core.exception.AssertError ./../../src/phobos/std/array.d(210): Attempting to
fetch the front of an empty array

same happens if operating on int not string
I'm using dmd2.030
same happens with dmd2.029

is that a bug?

... Yes, but not with Phobos. The comparison operator should use < less than, if two items are equal they must return false. isSorted(["TOM","TOM"]) is true, "TOM" < "TOM" is false. Gide
Jun 04 2009