Squid crash log:

death
/var/tmp/squid.build/src/tools.c:268
__fstat
/usr/src/bs/BUILD/glibc/io/fstat.c:45
heap_referenced
/var/tmp/squid.build/src/repl/heap/store_repl_heap.c:112
storeAufsDirUnrefObj
/var/tmp/squid.build/src/fs/aufs/store_dir_aufs.c:1408
storeEntryDereferenced
/var/tmp/squid.build/src/store.c:249
storeUnlockObject
/var/tmp/squid.build/src/store.c:306
httpRequestFree
/var/tmp/squid.build/src/client_side.c:764
connStateFree
/var/tmp/squid.build/src/client_side.c:802
commCallCloseHandlers
/var/tmp/squid.build/src/comm.c:535
comm_close
/var/tmp/squid.build/src/comm.c:592
clientReadRequest
/var/tmp/squid.build/src/client_side.c:2532
comm_poll
/var/tmp/squid.build/src/comm_select.c:432
main
/var/tmp/squid.build/src/main.c:728
_init
(null):0