negative values in mgr:info

[Niki Gorchilov <niki@xxxxxxxxxxxxx>]

Hello,

While using Squid 3.4.3 on 64bit Ubuntu 12.04.3 with 64GB cache mem
and I see negative values in some memory-related statistics:

===[cut]===
Memory usage for squid via mallinfo():
        Total space in arena:  -972092 KB
        Ordinary blocks:       -974454 KB   4472 blks
        Small blocks:               0 KB      0 blks
        Holding blocks:        740328 KB     19 blks
        Free Small blocks:          0 KB
        Free Ordinary blocks:    2362 KB
        Total in use:            2362 KB -1%
        Total free:              2362 KB -1%
        Total size:            -231764 KB
Memory accounted for:
        Total accounted:       1834725 KB -792%
        memPool accounted:     77332197 KB -33367%
        memPool unaccounted:   -77563961 KB  -0%
        memPoolAlloc calls: 13874752170
        memPoolFree calls:  13959152640
===[cut]===

Are these result of integer overflow or using signed integers?

Best,
Niki