memcached crash in write_bin_error

While running memcapable against the product, on osx / dev box, I saw memcached crashed according to the console, here...

(by the way, I had MallocScribble turned on, too)

Thread 4 Crashed:
0 memcached 0x0000000100008c9d write_bin_error + 253 (memcached.c:1290)
1 memcached 0x000000010000d91c complete_nread_binary + 1212 (memcached.c:5526)
2 memcached 0x000000010000e95a conn_nread + 970 (memcached.c:3140)
3 memcached 0x0000000100002646 event_handler + 166 (memcached.c:4922)
4 libevent-1.4.2.dylib 0x0000000100029031 event_base_loop + 1217
5 memcached 0x0000000100010461 worker_libevent + 65 (thread.c:254)
6 libSystem.B.dylib 0x00007fff841dc8b6 _pthread_start + 331
7 libSystem.B.dylib 0x00007fff841dc769 thread_start + 13