[Issue 8061] std.algorithm.joiner breaks when used with InputRangeObject

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8061


hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
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                 CC|                            |hsteoh at quickfur.ath.cx


--- Comment #3 from hsteoh at quickfur.ath.cx 2012-10-10 09:15:48 PDT ---
Wait, if an inner range is not a forward range, then .save is invalid, because
if you call .save at one point, then advance the origin range, the inner ranges
may have been invalidated, so the .save'd range is invalid.

So .save should only be defined if both the outer range and the inner ranges
are forward ranges, IMO.

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