[Issue 19644] std.range.takeOne opSlice asserts incorrectly when operating on non-forward input range

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19644

--- Comment #1 from Jon Degenhardt <jrdemail2000-dlang at yahoo.com> ---
PR 6853: https://github.com/dlang/phobos/pull/6853

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