[Issue 18807] RefRange behaves very differently for Input Ranges and Forward Ranges

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18807

Steven Schveighoffer <schveiguy at yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |schveiguy at yahoo.com

--- Comment #3 from Steven Schveighoffer <schveiguy at yahoo.com> ---
There are 2 issues here. One is the same from 14619 -- the compiler is assuming
opSlice  on a valid range is a no-op.

The second issue is that for some reason opSlice is defined in RefRange iff
save is defined. That makes no sense.

Fixing either of these issues will fix the problem I think.

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