Protect from exceptions when attaching editor views w/ dead editors
Protect from exceptions when attaching editor views w/ dead editors

Addresses #1306

We still need to know why this is happening, so I left an exception in
non-release builds. Since the pane system is about to change a lot I
think this is good enough for now.

me6iaton/atom,githubteacher/atom,hellendag/atom,codex8/atom,FoldingText/atom,tony612/atom,GHackAnonymous/atom,matthewclendening/atom,russlescai/atom,BogusCurry/atom,lisonma/atom,decaffeinate-examples/atom,jacekkopecky/atom,scippio/atom,vhutheesing/atom,kittens/atom,me-benni/atom,ironbox360/atom,vinodpanicker/atom,amine7536/atom,ilovezy/atom,pombredanne/atom,ali/atom,dijs/atom,NunoEdgarGub1/atom,medovob/atom,Jdesk/atom,hharchani/atom,hagb4rd/atom,mnquintana/atom,fedorov/atom,paulcbetts/atom,AdrianVovk/substance-ide,svanharmelen/atom,avdg/atom,chengky/atom,KENJU/atom,gisenberg/atom,splodingsocks/atom,matthewclendening/atom,tisu2tisu/atom,rjattrill/atom,scv119/atom,me6iaton/atom,ObviouslyGreen/atom,tony612/atom,oggy/atom,Locke23rus/atom,me-benni/atom,qskycolor/atom,rookie125/atom,Jonekee/atom,qiujuer/atom,davideg/atom,lpommers/atom,Abdillah/atom,hharchani/atom,tisu2tisu/atom,rxkit/atom,YunchengLiao/atom,johnrizzo1/atom,omarhuanca/atom,davideg/atom,batjko/atom,folpindo/atom,Neron-X5/atom,wiggzz/atom,omarhuanca/atom,batjko/atom,Sangaroonaom/atom,tmunro/atom,tisu2tisu/atom,dannyflax/atom,Jandersoft/atom,ykeisuke/atom,Jandersolutions/atom,anuwat121/atom,cyzn/atom,ivoadf/atom,jlord/atom,Jandersoft/atom,svanharmelen/atom,AlisaKiatkongkumthon/atom,burodepeper/atom,wiggzz/atom,deoxilix/atom,gisenberg/atom,chfritz/atom,YunchengLiao/atom,sillvan/atom,chengky/atom,pombredanne/atom,kaicataldo/atom,kdheepak89/atom,yamhon/atom,deoxilix/atom,xream/atom,kevinrenaers/atom,Ingramz/atom,MjAbuz/atom,abcP9110/atom,abcP9110/atom,nucked/atom,ashneo76/atom,vcarrera/atom,constanzaurzua/atom,Austen-G/BlockBuilder,abcP9110/atom,execjosh/atom,folpindo/atom,targeter21/atom,ralphtheninja/atom,rsvip/aTom,mertkahyaoglu/atom,nvoron23/atom,kaicataldo/atom,rjattrill/atom,NunoEdgarGub1/atom,Klozz/atom,mrodalgaard/atom,kc8wxm/atom,crazyquark/atom,Ju2ender/atom,constanzaurzua/atom,synaptek/atom,Dennis1978/atom,gisenberg/atom,targeter21/atom,jlord/atom,ali/atom,constanzaurzua/atom,ezeoleaf/atom,deepfox/atom,johnrizzo1/atom,batjko/atom,alfredxing/atom,john-kelly/atom,fedorov/atom,Mokolea/atom,gabrielPeart/atom,boomwaiza/atom,FIT-CSE2410-A-Bombs/atom,RuiDGoncalves/atom,Shekharrajak/atom,darwin/atom,BogusCurry/atom,rmartin/atom,yomybaby/atom,kjav/atom,dijs/atom,ykeisuke/atom,darwin/atom,lovesnow/atom,Sangaroonaom/atom,Jdesk/atom,sekcheong/atom,isghe/atom,john-kelly/atom,g2p/atom,harshdattani/atom,001szymon/atom,fredericksilva/atom,einarmagnus/atom,dannyflax/atom,paulcbetts/atom,Hasimir/atom,targeter21/atom,yomybaby/atom,transcranial/atom,hakatashi/atom,execjosh/atom,nvoron23/atom,lovesnow/atom,ashneo76/atom,mertkahyaoglu/atom,Ingramz/atom,medovob/atom,targeter21/atom,Neron-X5/atom,champagnez/atom,gontadu/atom,einarmagnus/atom,yalexx/atom,vcarrera/atom,burodepeper/atom,codex8/atom,brettle/atom,champagnez/atom,lpommers/atom,johnhaley81/atom,atom/atom,cyzn/atom,NunoEdgarGub1/atom,isghe/atom,jordanbtucker/atom,florianb/atom,woss/atom,synaptek/atom,FoldingText/atom,kdheepak89/atom,rjattrill/atom,devmario/atom,AdrianVovk/substance-ide,jjz/atom,scippio/atom,devmario/atom,yalexx/atom,palita01/atom,ObviouslyGreen/atom,pombredanne/atom,sekcheong/atom,ironbox360/atom,champagnez/atom,mnquintana/atom,dkfiresky/atom,YunchengLiao/atom,Galactix/atom,kdheepak89/atom,sebmck/atom,sxgao3001/atom,xream/atom,fredericksilva/atom,jordanbtucker/atom,Mokolea/atom,AlexxNica/atom,tony612/atom,mostafaeweda/atom,dijs/atom,ReddTea/atom,atom/atom,pombredanne/atom,fedorov/atom,bj7/atom,hakatashi/atom,SlimeQ/atom,devoncarew/atom,001szymon/atom,oggy/atom,prembasumatary/atom,ralphtheninja/atom,KENJU/atom,yalexx/atom,einarmagnus/atom,tanin47/atom,rsvip/aTom,0x73/atom,kc8wxm/atom,jeremyramin/atom,gisenberg/atom,AlexxNica/atom,me-benni/atom,execjosh/atom,bencolon/atom,Hasimir/atom,ali/atom,tjkr/atom,woss/atom,targeter21/atom,gontadu/atom,jlord/atom,jacekkopecky/atom,toqz/atom,vjeux/atom,FoldingText/atom,boomwaiza/atom,gzzhanghao/atom,nucked/atom,codex8/atom,ykeisuke/atom,darwin/atom,Huaraz2/atom,decaffeinate-examples/atom,tanin47/atom,splodingsocks/atom,KENJU/atom,panuchart/atom,bryonwinger/atom,synaptek/atom,fedorov/atom,dsandstrom/atom,abe33/atom,GHackAnonymous/atom,bryonwinger/atom,Jandersoft/atom,vinodpanicker/atom,daxlab/atom,Jonekee/atom,abcP9110/atom,brettle/atom,bj7/atom,hagb4rd/atom,bryonwinger/atom,qiujuer/atom,devmario/atom,phord/atom,CraZySacX/atom,mdumrauf/atom,ppamorim/atom,ivoadf/atom,yomybaby/atom,acontreras89/atom,pengshp/atom,yangchenghu/atom,Austen-G/BlockBuilder,rsvip/aTom,rxkit/atom,stuartquin/atom,anuwat121/atom,me6iaton/atom,jacekkopecky/atom,isghe/atom,PKRoma/atom,deoxilix/atom,ralphtheninja/atom,hakatashi/atom,RuiDGoncalves/atom,niklabh/atom,toqz/atom,amine7536/atom,Ju2ender/atom,wiggzz/atom,stinsonga/atom,FoldingText/atom,dkfiresky/atom,elkingtonmcb/atom,Jandersolutions/atom,medovob/atom,ReddTea/atom,h0dgep0dge/atom,jacekkopecky/atom,Rodjana/atom,gzzhanghao/atom,phord/atom,amine7536/atom,dannyflax/atom,nrodriguez13/atom,vcarrera/atom,Arcanemagus/atom,bcoe/atom,ilovezy/atom,ashneo76/atom,kandros/atom,ppamorim/atom,tjkr/atom,basarat/atom,palita01/atom,matthewclendening/atom,PKRoma/atom,CraZySacX/atom,yangchenghu/atom,lpommers/atom,kevinrenaers/atom,YunchengLiao/atom,Jandersolutions/atom,liuderchi/atom,pengshp/atom,Abdillah/atom,Galactix/atom,russlescai/atom,charleswhchan/atom,charleswhchan/atom,Rychard/atom,Mokolea/atom,efatsi/atom,rmartin/atom,ezeoleaf/atom,bolinfest/atom,MjAbuz/atom,hpham04/atom,bencolon/atom,Rodjana/atom,einarmagnus/atom,lovesnow/atom,john-kelly/atom,qiujuer/atom,decaffeinate-examples/atom,MjAbuz/atom,ilovezy/atom,panuchart/atom,woss/atom,DiogoXRP/atom,davideg/atom,stuartquin/atom,Andrey-Pavlov/atom,lisonma/atom,originye/atom,jlord/atom,mertkahyaoglu/atom,FoldingText/atom,jjz/atom,Neron-X5/atom,Rodjana/atom,fscherwi/atom,Andrey-Pavlov/atom,Austen-G/BlockBuilder,dkfiresky/atom,RobinTec/atom,jacekkopecky/atom,vjeux/atom,chengky/atom,sotayamashita/atom,fang-yufeng/atom,liuxiong332/atom,yomybaby/atom,Galactix/atom,Huaraz2/atom,liuxiong332/atom,toqz/atom,githubteacher/atom,liuxiong332/atom,erikhakansson/atom,PKRoma/atom,rsvip/aTom,sekcheong/atom,stuartquin/atom,kc8wxm/atom,prembasumatary/atom,yamhon/atom,001szymon/atom,devmario/atom,pombredanne/atom,tmunro/atom,paulcbetts/atom,hakatashi/atom,constanzaurzua/atom,davideg/atom,basarat/atom,paulcbetts/atom,brumm/atom,vcarrera/atom,basarat/atom,dsandstrom/atom,hagb4rd/atom,davideg/atom,dsandstrom/atom,acontreras89/atom,SlimeQ/atom,ObviouslyGreen/atom,niklabh/atom,deepfox/atom,ppamorim/atom,Andrey-Pavlov/atom,vhutheesing/atom,AdrianVovk/substance-ide,splodingsocks/atom,decaffeinate-examples/atom,seedtigo/atom,erikhakansson/atom,qskycolor/atom,daxlab/atom,crazyquark/atom,Huaraz2/atom,basarat/atom,Hasimir/atom,mrodalgaard/atom,einarmagnus/atom,NunoEdgarGub1/atom,Austen-G/BlockBuilder,crazyquark/atom,rsvip/aTom,0x73/atom,crazyquark/atom,dannyflax/atom,sillvan/atom,bradgearon/atom,FIT-CSE2410-A-Bombs/atom,BogusCurry/atom,AlbertoBarrago/atom,Shekharrajak/atom,chfritz/atom,liuxiong332/atom,bolinfest/atom,russlescai/atom,G-Baby/atom,transcranial/atom,hagb4rd/atom,Rychard/atom,fang-yufeng/atom,t9md/atom,GHackAnonymous/atom,AlexxNica/atom,ReddTea/atom,batjko/atom,liuderchi/atom,johnhaley81/atom,Andrey-Pavlov/atom,mrodalgaard/atom,acontreras89/atom,Shekharrajak/atom,pengshp/atom,sillvan/atom,gabrielPeart/atom,alfredxing/atom,jacekkopecky/atom,svanharmelen/atom,g2p/atom,constanzaurzua/atom,Ju2ender/atom,sebmck/atom,andrewleverette/atom,oggy/atom,githubteacher/atom,brettle/atom,mostafaeweda/atom,Jandersolutions/atom,Jandersoft/atom,devmario/atom,john-kelly/atom,Hasimir/atom,ali/atom,hharchani/atom,amine7536/atom,GHackAnonymous/atom,bolinfest/atom,avdg/atom,hharchani/atom,mostafaeweda/atom,Jonekee/atom,synaptek/atom,omarhuanca/atom,sebmck/atom,Shekharrajak/atom,n-riesco/atom,AlisaKiatkongkumthon/atom,andrewleverette/atom,kdheepak89/atom,dsandstrom/atom,MjAbuz/atom,sxgao3001/atom,boomwaiza/atom,Neron-X5/atom,basarat/atom,omarhuanca/atom,sotayamashita/atom,crazyquark/atom,stinsonga/atom,Jdesk/atom,Andrey-Pavlov/atom,ezeoleaf/atom,Shekharrajak/atom,gabrielPeart/atom,chengky/atom,charleswhchan/atom,h0dgep0dge/atom,n-riesco/atom,dsandstrom/atom,prembasumatary/atom,pkdevbox/atom,nucked/atom,FIT-CSE2410-A-Bombs/atom,mnquintana/atom,yalexx/atom,vhutheesing/atom,scippio/atom,hpham04/atom,woss/atom,isghe/atom,seedtigo/atom,ardeshirj/atom,SlimeQ/atom,mostafaeweda/atom,liuderchi/atom,gzzhanghao/atom,Neron-X5/atom,kjav/atom,yomybaby/atom,Jandersoft/atom,oggy/atom,Galactix/atom,G-Baby/atom,isghe/atom,vinodpanicker/atom,charleswhchan/atom,basarat/atom,t9md/atom,fedorov/atom,kittens/atom,sxgao3001/atom,avdg/atom,ezeoleaf/atom,stinsonga/atom,kdheepak89/atom,RobinTec/atom,liuxiong332/atom,mertkahyaoglu/atom,RobinTec/atom,beni55/atom,harshdattani/atom,russlescai/atom,johnrizzo1/atom,toqz/atom,brumm/atom,splodingsocks/atom,atom/atom,nvoron23/atom,efatsi/atom,hpham04/atom,0x73/atom,efatsi/atom,john-kelly/atom,kjav/atom,deepfox/atom,rookie125/atom,amine7536/atom,sxgao3001/atom,jjz/atom,nrodriguez13/atom,ppamorim/atom,originye/atom,ivoadf/atom,toqz/atom,mnquintana/atom,jlord/atom,folpindo/atom,niklabh/atom,synaptek/atom,rookie125/atom,Ju2ender/atom,phord/atom,qskycolor/atom,alexandergmann/atom,elkingtonmcb/atom,jtrose2/atom,CraZySacX/atom,andrewleverette/atom,hpham04/atom,deepfox/atom,abcP9110/atom,Abdillah/atom,ilovezy/atom,vjeux/atom,nvoron23/atom,acontreras89/atom,anuwat121/atom,G-Baby/atom,0x73/atom,tony612/atom,Klozz/atom,devoncarew/atom,sillvan/atom,sebmck/atom,mdumrauf/atom,lisonma/atom,palita01/atom,tanin47/atom,SlimeQ/atom,prembasumatary/atom,qiujuer/atom,daxlab/atom,Ju2ender/atom,lovesnow/atom,ironbox360/atom,yalexx/atom,FoldingText/atom,Abdillah/atom,mdumrauf/atom,Rychard/atom,gontadu/atom,Dennis1978/atom,h0dgep0dge/atom,dkfiresky/atom,n-riesco/atom,jtrose2/atom,hagb4rd/atom,hellendag/atom,rmartin/atom,Hasimir/atom,bencolon/atom,ReddTea/atom,seedtigo/atom,russlescai/atom,lisonma/atom,vinodpanicker/atom,xream/atom,KENJU/atom,sebmck/atom,sotayamashita/atom,t9md/atom,bsmr-x-script/atom,mostafaeweda/atom,sillvan/atom,kevinrenaers/atom,ali/atom,vinodpanicker/atom,Abdillah/atom,me6iaton/atom,me6iaton/atom,pkdevbox/atom,pkdevbox/atom,DiogoXRP/atom,erikhakansson/atom,MjAbuz/atom,gisenberg/atom,bcoe/atom,dannyflax/atom,ardeshirj/atom,elkingtonmcb/atom,ardeshirj/atom,NunoEdgarGub1/atom,bradgearon/atom,johnhaley81/atom,vjeux/atom,rlugojr/atom,rmartin/atom,qskycolor/atom,RobinTec/atom,jtrose2/atom,omarhuanca/atom,fang-yufeng/atom,abe33/atom,alexandergmann/atom,Jdesk/atom,rjattrill/atom,burodepeper/atom,stinsonga/atom,qiujuer/atom,ReddTea/atom,charleswhchan/atom,Ingramz/atom,ilovezy/atom,transcranial/atom,matthewclendening/atom,kc8wxm/atom,bsmr-x-script/atom,cyzn/atom,rlugojr/atom,harshdattani/atom,n-riesco/atom,devoncarew/atom,GHackAnonymous/atom,AlbertoBarrago/atom,fscherwi/atom,jtrose2/atom,vcarrera/atom,nrodriguez13/atom,rxkit/atom,sekcheong/atom,Sangaroonaom/atom,qskycolor/atom,jeremyramin/atom,Klozz/atom,liuderchi/atom,bcoe/atom,hharchani/atom,kjav/atom,devoncarew/atom,scv119/atom,Arcanemagus/atom,scv119/atom,KENJU/atom,g2p/atom,fang-yufeng/atom,Locke23rus/atom,fang-yufeng/atom,n-riesco/atom,Jdesk/atom,woss/atom,matthewclendening/atom,bcoe/atom,fredericksilva/atom,bradgearon/atom,kjav/atom,Austen-G/BlockBuilder,acontreras89/atom,brumm/atom,sxgao3001/atom,chengky/atom,codex8/atom,kittens/atom,lisonma/atom,kandros/atom,sekcheong/atom,originye/atom,lovesnow/atom,ppamorim/atom,Austen-G/BlockBuilder,helber/atom,mertkahyaoglu/atom,RobinTec/atom,alfredxing/atom,beni55/atom,vjeux/atom,helber/atom,kittens/atom,tmunro/atom,rlugojr/atom,kaicataldo/atom,devoncarew/atom,jeremyramin/atom,deepfox/atom,prembasumatary/atom,abe33/atom,beni55/atom,scv119/atom,fscherwi/atom,Galactix/atom,chfritz/atom,bryonwinger/atom,YunchengLiao/atom,dannyflax/atom,jtrose2/atom,tony612/atom,Dennis1978/atom,jordanbtucker/atom,yangchenghu/atom,fredericksilva/atom,alexandergmann/atom,mnquintana/atom,Arcanemagus/atom,florianb/atom,florianb/atom,helber/atom,dkfiresky/atom,RuiDGoncalves/atom,DiogoXRP/atom,h0dgep0dge/atom,bj7/atom,oggy/atom,yamhon/atom,panuchart/atom,nvoron23/atom,jjz/atom,hpham04/atom,Jandersolutions/atom,bsmr-x-script/atom,bcoe/atom,tjkr/atom,AlisaKiatkongkumthon/atom,kc8wxm/atom,kittens/atom,jjz/atom,Locke23rus/atom,kandros/atom,florianb/atom,rmartin/atom,AlbertoBarrago/atom,SlimeQ/atom,batjko/atom,florianb/atom,fredericksilva/atom,hellendag/atom,codex8/atom