[Issue 15041] New: Pointer slice with one negative index throws 'Range violation'

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15041

          Issue ID: 15041
           Summary: Pointer slice with one negative index throws 'Range
                    violation'
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: anoneuron at gmail.com

When slicing a pointer, if one (not both) of the indices is negative, it throws
a Range violation. Tested with DMD 2.068.1

example:
    auto p = &"aaaaaaaaaaaaaaaaaaaaa"[5];
    assert(p[-1] == 'a'); // no problem
    assert(p[-3 .. -1] == "aa"); // no problem
    assert(p[-1 .. 1] == "aa"); // 'Range violation'

( http://dpaste.dzfl.pl/3be7eb85483c )

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