[Issue 22487] New: Array!T.init.data crashes

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22487

          Issue ID: 22487
           Summary: Array!T.init.data crashes
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: timon.gehr at gmx.ch
                CC: dandrei279 at gmail.com, maxhaton at gmail.com

The fix for issue 21100 is buggy, the following code crashes:

---
void main(){
    import std.container;
    Array!int a;
    foreach(i;a.data){}
}
---
core.exception.AssertError at std/typecons.d(6644): Attempted to access an
uninitialized payload.
---

It should check whether the data is initialized, like most other members of
Array!T do. If the data is not initialized, it should return an empty dynamic
array.

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