Critical Error

[dingsp]

fc_malloc/malloc3.cpp

Line 802 in 7a56cf9

auto claim_pos = rb.claim( claim_num );

May be too many thread claims and there are two threads get the same index in the ring buffer, so I think it may cause serious error.

[dingsp]

I think claim block first and then compare claim_pos with _write_pos is safe.
if claim_pos <= _write_pos, we can read the ring buffer.