** Changed in: duetto
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1299510
Title:
std::rotate fails in some cases due to std::memmove
Status in Duetto: C++ for the Web:
Confirmed
Bug description:
Testcase attached
I've noticed a weird failure of std::rotate(first, middle, last) that
happens when middle == last - 1, i.e. when trying to rotate_right.
The library has a special case for that: it detects that we are
rotating right and __rotate_right gets called (algorithm:2325)
__rotate_right moves the last element in the first place and then
tries to move all the other elements forwards by one position by
calling move_backward (algorithm:1897)
There are different versions of move_backward: one of them is selected
based on the result of a __unwrap_iter (algorithm:1674).
In this case __move_backward (algorithm:1885) gets called: this
version deals with memory pointers, and calls std::memmove to actually
move objects. This some how fails
One of the possible solutions would probably be to remove
__unwrap_iter that returns a pointer and deal always with iterators.
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