future: fix future::then_wrapped() in exception case
future: fix future::then_wrapped() in exception case

Calling state.get() will throw the exception instead of calling the function,
thus denying the called function the chance to deal with the exception.

Fix by constructing the future directly from state.

stamhe/scylla,acbellini/seastar,dwdm/seastar,stamhe/seastar,rluta/scylla,capturePointer/scylla,dreamsxin/seastar,leejir/seastar,ducthangho/imdb,raphaelsc/seastar,chunshengster/seastar,scylladb/scylla-seastar,stamhe/scylla,avikivity/seastar,kjniemi/seastar,phonkee/scylla,scylladb/scylla,chunshengster/seastar,bowlofstew/seastar,wildinto/scylla,scylladb/seastar,syuu1228/seastar,ducthangho/imdb,slivne/seastar,scylladb/scylla-seastar,respu/scylla,wildinto/seastar,slivne/seastar,phonkee/scylla,cloudius-systems/seastar,sjperkins/seastar,printedheart/seastar,kangkot/scylla,dwdm/scylla,linearregression/scylla,scylladb/seastar,bowlofstew/seastar,tempbottle/scylla,aruanruan/scylla,hongliangzhao/seastar,tempbottle/seastar,asias/scylla,dwdm/seastar,asias/scylla,linearregression/scylla,printedheart/seastar,gwicke/scylla,flashbuckets/seastar,bowlofstew/scylla,syuu1228/seastar,norcimo5/seastar,gwicke/scylla,duarten/scylla,acbellini/seastar,gwicke/scylla,sjperkins/seastar,acbellini/scylla,tempbottle/seastar,victorbriz/scylla,guiquanz/scylla,hongliangzhao/seastar,capturePointer/scylla,wildinto/seastar,avikivity/seastar,shyamalschandra/seastar,asias/scylla,dwdm/scylla,bzero/seastar,glommer/scylla,acbellini/seastar,eklitzke/scylla,dreamsxin/seastar,raphaelsc/seastar,bzero/seastar,acbellini/scylla,kjniemi/scylla,mixja/seastar,stamhe/seastar,linearregression/seastar,linearregression/scylla,shaunstanislaus/scylla,rluta/scylla,flashbuckets/seastar,wildinto/scylla,wildinto/scylla,scylladb/scylla-seastar,xtao/seastar,avikivity/scylla,kjniemi/scylla,eklitzke/scylla,bowlofstew/scylla,linearregression/seastar,phonkee/scylla,duarten/scylla,glommer/scylla,scylladb/scylla,joerg84/seastar,rluta/scylla,justintung/scylla,joerg84/seastar,anzihenry/seastar,duarten/scylla,stamhe/seastar,senseb/scylla,sjperkins/seastar,printedheart/seastar,victorbriz/scylla,guiquanz/scylla,shaunstanislaus/scylla,avikivity/seastar,raphaelsc/seastar,linearregression/seastar,wildinto/seastar,hongliangzhao/seastar,flashbuckets/seastar,kjniemi/seastar,leejir/seastar,tempbottle/seastar,aruanruan/scylla,capturePointer/scylla,tempbottle/scylla,scylladb/scylla,stamhe/scylla,respu/scylla,ducthangho/imdb,cloudius-systems/seastar,justintung/scylla,tempbottle/scylla,acbellini/scylla,avikivity/scylla,kjniemi/seastar,mixja/seastar,shyamalschandra/seastar,eklitzke/scylla,norcimo5/seastar,chunshengster/seastar,norcimo5/seastar,avikivity/scylla,aruanruan/scylla,anzihenry/seastar,syuu1228/seastar,koolhazz/seastar,raphaelsc/scylla,senseb/scylla,kangkot/scylla,shyamalschandra/seastar,kangkot/scylla,senseb/scylla,koolhazz/seastar,slivne/seastar,victorbriz/scylla,xtao/seastar,scylladb/seastar,rentongzhang/scylla,bowlofstew/seastar,bowlofstew/scylla,dwdm/seastar,leejir/seastar,raphaelsc/scylla,xtao/seastar,jonathanleang/seastar,dwdm/scylla,jonathanleang/seastar,koolhazz/seastar,anzihenry/seastar,raphaelsc/scylla,jonathanleang/seastar,glommer/scylla,rentongzhang/scylla,bzero/seastar,mixja/seastar,respu/scylla,guiquanz/scylla,kjniemi/scylla,justintung/scylla,shaunstanislaus/scylla,scylladb/scylla,cloudius-systems/seastar,joerg84/seastar,rentongzhang/scylla,dreamsxin/seastar