[Issue 9559] New: Range of Nullable doesn't work with std.array.array

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9559

           Summary: Range of Nullable doesn't work with std.array.array
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: justin at economicmodeling.com


--- Comment #0 from Justin Whear <justin at economicmodeling.com> 2013-02-21 11:24:22 PST ---
Using std.array.array on a range of Nullable!T causes a runtime error if at
least one of the elements is set to null.  Test case:
----------------------
import std.algorithm;
import std.typecons;
void main()
{
       alias Nullable!int I;
    auto ints = [0, 1, 2].map!(i => i & 1 ? I.init : I(i));
    auto asArray = std.array.array(ints);
}
----------------------

Produces the following error:
object.Exception@/usr/include/dmd/phobos/std/typecons.d(1181): Enforcement
failed

Full backtrace here: http://pastebin.com/wMFRKk6L

The enforcement exception occurs in Nullable's get() function (I'm using 2.062,
I noticed that this has been changed to an assert in HEAD) and Nullable has an
alias this to get. Best guess is that this is actually a problem in emplace or
array's usage of it.

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