Overlapping arrays in copy

[yannick]

sometimes my app crashes when unpacking huge amounts of msgpack packets.
unfortunately i can't reproduce it. i get the following trace:

object.Error@(0): Overlapping arrays in copy: 4065435 byte(s) overlap of 4843686
----------------
5   filters                             0x0000000109721731 _d_arraycopy + 149
6   filters                             0x00000001096f4fa5 @safe void msgpack.StreamingUnpacker.__mixin12.feed(const(ubyte[])) + 153

why is the buffer array copied?

[repeatedly]

That's weird. msgpack-d checks array overlap in this line >

msgpack-d/src/msgpack.d

Line 2030 in 2bd9089

unparsed = area.overlap(unparsed) ? unparsed.dup : unparsed;

Hmm... how about removing overlap check and returns always dupped array in above line?