memory: attempt to catch underflows
memory: attempt to catch underflows

If someone attempts to allocate 0xffff'ffff'ffff'ff80 bytes, it was
probably some underflow that resulted in -128.  Abort to let someone
debug it.

sjperkins/seastar,jonathanleang/seastar,tempbottle/seastar,scylladb/seastar,dwdm/seastar,norcimo5/seastar,dreamsxin/seastar,stamhe/seastar,linearregression/seastar,hongliangzhao/seastar,acbellini/seastar,shyamalschandra/seastar,kjniemi/seastar,dwdm/seastar,bowlofstew/seastar,syuu1228/seastar,sjperkins/seastar,jonathanleang/seastar,koolhazz/seastar,scylladb/scylla-seastar,wildinto/seastar,avikivity/seastar,hongliangzhao/seastar,flashbuckets/seastar,acbellini/seastar,cloudius-systems/seastar,avikivity/seastar,wildinto/seastar,flashbuckets/seastar,printedheart/seastar,leejir/seastar,joerg84/seastar,scylladb/scylla-seastar,mixja/seastar,syuu1228/seastar,acbellini/seastar,chunshengster/seastar,jonathanleang/seastar,linearregression/seastar,koolhazz/seastar,wildinto/seastar,joerg84/seastar,xtao/seastar,norcimo5/seastar,shyamalschandra/seastar,bowlofstew/seastar,xtao/seastar,stamhe/seastar,chunshengster/seastar,mixja/seastar,scylladb/seastar,tempbottle/seastar,anzihenry/seastar,shyamalschandra/seastar,dreamsxin/seastar,leejir/seastar,norcimo5/seastar,xtao/seastar,printedheart/seastar,sjperkins/seastar,printedheart/seastar,scylladb/scylla-seastar,dreamsxin/seastar,syuu1228/seastar,avikivity/seastar,mixja/seastar,anzihenry/seastar,bowlofstew/seastar,joerg84/seastar,linearregression/seastar,tempbottle/seastar,scylladb/seastar,chunshengster/seastar,leejir/seastar,kjniemi/seastar,dwdm/seastar,cloudius-systems/seastar,koolhazz/seastar,anzihenry/seastar,flashbuckets/seastar,kjniemi/seastar,stamhe/seastar,hongliangzhao/seastar,cloudius-systems/seastar