BUG: fix pickling MaskedConstant
BUG: fix pickling MaskedConstant

skwbc/numpy,naritta/numpy,ogrisel/numpy,ddasilva/numpy,solarjoe/numpy,mhvk/numpy,chiffa/numpy,BabeNovelty/numpy,mattip/numpy,MaPePeR/numpy,jankoslavic/numpy,ChanderG/numpy,WarrenWeckesser/numpy,BMJHayward/numpy,anntzer/numpy,pizzathief/numpy,WillieMaddox/numpy,bringingheavendown/numpy,dwillmer/numpy,madphysicist/numpy,andsor/numpy,mathdd/numpy,dato-code/numpy,Yusa95/numpy,kirillzhuravlev/numpy,mortada/numpy,maniteja123/numpy,SunghanKim/numpy,KaelChen/numpy,utke1/numpy,astrofrog/numpy,Anwesh43/numpy,bringingheavendown/numpy,astrofrog/numpy,SunghanKim/numpy,embray/numpy,NextThought/pypy-numpy,maniteja123/numpy,ewmoore/numpy,jakirkham/numpy,ahaldane/numpy,cowlicks/numpy,BMJHayward/numpy,tdsmith/numpy,ewmoore/numpy,pbrod/numpy,nguyentu1602/numpy,GaZ3ll3/numpy,pdebuyl/numpy,gmcastil/numpy,jschueller/numpy,simongibbons/numpy,gfyoung/numpy,WillieMaddox/numpy,Dapid/numpy,WarrenWeckesser/numpy,GrimDerp/numpy,kiwifb/numpy,rhythmsosad/numpy,tynn/numpy,dwf/numpy,Anwesh43/numpy,njase/numpy,behzadnouri/numpy,abalkin/numpy,Anwesh43/numpy,Srisai85/numpy,joferkington/numpy,anntzer/numpy,gmcastil/numpy,Linkid/numpy,drasmuss/numpy,astrofrog/numpy,musically-ut/numpy,njase/numpy,madphysicist/numpy,musically-ut/numpy,tdsmith/numpy,charris/numpy,moreati/numpy,jankoslavic/numpy,mortada/numpy,mortada/numpy,yiakwy/numpy,ESSS/numpy,ogrisel/numpy,shoyer/numpy,SiccarPoint/numpy,CMartelLML/numpy,rherault-insa/numpy,bertrand-l/numpy,bertrand-l/numpy,seberg/numpy,mhvk/numpy,dwf/numpy,simongibbons/numpy,dwf/numpy,Eric89GXL/numpy,ChristopherHogan/numpy,WarrenWeckesser/numpy,skwbc/numpy,pbrod/numpy,mortada/numpy,rajathkumarmp/numpy,dato-code/numpy,skymanaditya1/numpy,CMartelLML/numpy,ahaldane/numpy,GrimDerp/numpy,embray/numpy,charris/numpy,larsmans/numpy,mindw/numpy,stuarteberg/numpy,ewmoore/numpy,astrofrog/numpy,argriffing/numpy,empeeu/numpy,grlee77/numpy,MSeifert04/numpy,bmorris3/numpy,mingwpy/numpy,numpy/numpy,bertrand-l/numpy,simongibbons/numpy,sinhrks/numpy,b-carter/numpy,trankmichael/numpy,MSeifert04/numpy,MSeifert04/numpy,AustereCuriosity/numpy,gmcastil/numpy,dch312/numpy,cjermain/numpy,pizzathief/numpy,hainm/numpy,jakirkham/numpy,pizzathief/numpy,sinhrks/numpy,BabeNovelty/numpy,yiakwy/numpy,larsmans/numpy,MSeifert04/numpy,WarrenWeckesser/numpy,githubmlai/numpy,mingwpy/numpy,mattip/numpy,brandon-rhodes/numpy,tacaswell/numpy,numpy/numpy,stuarteberg/numpy,endolith/numpy,SiccarPoint/numpy,rgommers/numpy,sonnyhu/numpy,dimasad/numpy,MSeifert04/numpy,pdebuyl/numpy,naritta/numpy,naritta/numpy,larsmans/numpy,bmorris3/numpy,mattip/numpy,jonathanunderwood/numpy,mathdd/numpy,pelson/numpy,ekalosak/numpy,embray/numpy,felipebetancur/numpy,AustereCuriosity/numpy,MichaelAquilina/numpy,Linkid/numpy,ssanderson/numpy,nbeaver/numpy,b-carter/numpy,CMartelLML/numpy,dch312/numpy,jonathanunderwood/numpy,SunghanKim/numpy,mindw/numpy,utke1/numpy,dch312/numpy,chatcannon/numpy,ogrisel/numpy,dato-code/numpy,immerrr/numpy,immerrr/numpy,BMJHayward/numpy,gfyoung/numpy,argriffing/numpy,pbrod/numpy,larsmans/numpy,skwbc/numpy,endolith/numpy,cowlicks/numpy,Dapid/numpy,rgommers/numpy,endolith/numpy,rajathkumarmp/numpy,jakirkham/numpy,ViralLeadership/numpy,NextThought/pypy-numpy,dwillmer/numpy,jorisvandenbossche/numpy,sigma-random/numpy,nguyentu1602/numpy,dato-code/numpy,BMJHayward/numpy,embray/numpy,b-carter/numpy,pbrod/numpy,sonnyhu/numpy,ahaldane/numpy,pelson/numpy,andsor/numpy,seberg/numpy,groutr/numpy,joferkington/numpy,pyparallel/numpy,Eric89GXL/numpy,shoyer/numpy,tacaswell/numpy,leifdenby/numpy,GaZ3ll3/numpy,Linkid/numpy,groutr/numpy,dwf/numpy,ahaldane/numpy,felipebetancur/numpy,Linkid/numpy,grlee77/numpy,brandon-rhodes/numpy,sinhrks/numpy,mwiebe/numpy,MichaelAquilina/numpy,kiwifb/numpy,MichaelAquilina/numpy,mhvk/numpy,jorisvandenbossche/numpy,astrofrog/numpy,nbeaver/numpy,ContinuumIO/numpy,pelson/numpy,moreati/numpy,Srisai85/numpy,joferkington/numpy,seberg/numpy,dimasad/numpy,simongibbons/numpy,pyparallel/numpy,cjermain/numpy,ChanderG/numpy,mindw/numpy,has2k1/numpy,ESSS/numpy,maniteja123/numpy,kirillzhuravlev/numpy,moreati/numpy,hainm/numpy,rherault-insa/numpy,mathdd/numpy,madphysicist/numpy,mingwpy/numpy,tacaswell/numpy,mindw/numpy,jakirkham/numpy,rudimeier/numpy,charris/numpy,mhvk/numpy,has2k1/numpy,drasmuss/numpy,Anwesh43/numpy,NextThought/pypy-numpy,ChristopherHogan/numpy,grlee77/numpy,trankmichael/numpy,ViralLeadership/numpy,mhvk/numpy,ddasilva/numpy,joferkington/numpy,ChanderG/numpy,jorisvandenbossche/numpy,rhythmsosad/numpy,KaelChen/numpy,pyparallel/numpy,abalkin/numpy,KaelChen/numpy,KaelChen/numpy,has2k1/numpy,rgommers/numpy,Yusa95/numpy,dimasad/numpy,andsor/numpy,MichaelAquilina/numpy,skymanaditya1/numpy,skymanaditya1/numpy,naritta/numpy,rhythmsosad/numpy,grlee77/numpy,brandon-rhodes/numpy,githubmlai/numpy,NextThought/pypy-numpy,ajdawson/numpy,SiccarPoint/numpy,hainm/numpy,mingwpy/numpy,Yusa95/numpy,groutr/numpy,SiccarPoint/numpy,ddasilva/numpy,nbeaver/numpy,BabeNovelty/numpy,rmcgibbo/numpy,AustereCuriosity/numpy,empeeu/numpy,bmorris3/numpy,musically-ut/numpy,ssanderson/numpy,argriffing/numpy,ChristopherHogan/numpy,githubmlai/numpy,jankoslavic/numpy,sigma-random/numpy,leifdenby/numpy,BabeNovelty/numpy,ekalosak/numpy,jorisvandenbossche/numpy,skymanaditya1/numpy,endolith/numpy,GrimDerp/numpy,sonnyhu/numpy,rajathkumarmp/numpy,pelson/numpy,CMartelLML/numpy,chiffa/numpy,shoyer/numpy,githubmlai/numpy,GaZ3ll3/numpy,Srisai85/numpy,rudimeier/numpy,stuarteberg/numpy,tdsmith/numpy,pdebuyl/numpy,jankoslavic/numpy,ogrisel/numpy,drasmuss/numpy,mwiebe/numpy,mwiebe/numpy,ajdawson/numpy,ChanderG/numpy,ViralLeadership/numpy,sigma-random/numpy,jschueller/numpy,ogrisel/numpy,brandon-rhodes/numpy,Srisai85/numpy,felipebetancur/numpy,pelson/numpy,rhythmsosad/numpy,anntzer/numpy,ekalosak/numpy,mathdd/numpy,pbrod/numpy,GrimDerp/numpy,MaPePeR/numpy,empeeu/numpy,Eric89GXL/numpy,empeeu/numpy,madphysicist/numpy,ajdawson/numpy,andsor/numpy,SunghanKim/numpy,jorisvandenbossche/numpy,WillieMaddox/numpy,cowlicks/numpy,rudimeier/numpy,rgommers/numpy,cjermain/numpy,jonathanunderwood/numpy,musically-ut/numpy,pdebuyl/numpy,anntzer/numpy,WarrenWeckesser/numpy,gfyoung/numpy,jakirkham/numpy,ekalosak/numpy,dch312/numpy,MaPePeR/numpy,kirillzhuravlev/numpy,ESSS/numpy,leifdenby/numpy,rmcgibbo/numpy,tynn/numpy,ewmoore/numpy,felipebetancur/numpy,pizzathief/numpy,abalkin/numpy,chatcannon/numpy,chiffa/numpy,bringingheavendown/numpy,njase/numpy,sonnyhu/numpy,dwillmer/numpy,pizzathief/numpy,yiakwy/numpy,rajathkumarmp/numpy,ahaldane/numpy,sinhrks/numpy,ContinuumIO/numpy,rmcgibbo/numpy,tynn/numpy,immerrr/numpy,nguyentu1602/numpy,immerrr/numpy,behzadnouri/numpy,charris/numpy,simongibbons/numpy,rmcgibbo/numpy,madphysicist/numpy,ssanderson/numpy,kiwifb/numpy,cowlicks/numpy,hainm/numpy,dimasad/numpy,utke1/numpy,yiakwy/numpy,solarjoe/numpy,Dapid/numpy,Yusa95/numpy,rudimeier/numpy,mattip/numpy,ContinuumIO/numpy,cjermain/numpy,ChristopherHogan/numpy,nguyentu1602/numpy,numpy/numpy,has2k1/numpy,rherault-insa/numpy,jschueller/numpy,kirillzhuravlev/numpy,bmorris3/numpy,grlee77/numpy,Eric89GXL/numpy,dwf/numpy,GaZ3ll3/numpy,jschueller/numpy,trankmichael/numpy,embray/numpy,dwillmer/numpy,seberg/numpy,MaPePeR/numpy,trankmichael/numpy,numpy/numpy,tdsmith/numpy,shoyer/numpy,stuarteberg/numpy,behzadnouri/numpy,shoyer/numpy,ajdawson/numpy,chatcannon/numpy,ewmoore/numpy,solarjoe/numpy,sigma-random/numpy