https://issues.dlang.org/show_bug.cgi?id=21724
Issue ID: 21724
Summary: copy fails on overlapping ranges
Product: D
Version: D2
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: P1
Component: phobos
Assignee: [email protected]
Reporter: [email protected]
When the spec says in https://dlang.org/spec/arrays.html, it demonstrates it
using overlapping arrays, but only in the case of copying later elements
(bigger index) to earlier elements (smaller index). In the case of the opposite
direction, copy does not produce the expected result.
The respective version of the example in the spec
import std.algorithm;
int[] s = [1, 2, 3, 4];
copy(s[0..2], s[1..3]);
assert(s == [1, 1, 2, 4]);
fails, because s == [1, 1, 1, 1].
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