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

[via Digitalmars-d-bugs]

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

Vladimir Panteleev <thecybershadow at gmail.com> changed:

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                 CC|                            |thecybershadow at gmail.com

--- Comment #1 from Vladimir Panteleev <thecybershadow at gmail.com> ---
> 	assert(p[-1 .. 1] == "aa"); // 'Range violation'

What happens here is that -1 gets implicitly casted to size_t, which is
unsigned, so this becomes p[size_t.max .. 1]. Slicing p[a..b] when a>b is
nonsense, hence the RangeError.

The check is removed when -release is present.

I'm not sure this is a bug.

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