[Issue 13958] RangeError with impure map

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13958

Peter Alexander <peter.alexander.au at gmail.com> changed:

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--- Comment #2 from Peter Alexander <peter.alexander.au at gmail.com> ---
This isn't a bug. You cannot make assumptions about how many times joiner will
call .front. Since map is a forward range, you cannot assume that joiner will
only iterate once. Like bearophile, I would highly recommend using pure
functions with map.

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