Don't use a pipe for capturing in test runner
Don't use a pipe for capturing in test runner

Apparently Python can call arbitrarily deallocation code whenever its
allocator is invoked, which can cause output from gRPC core to stderr,
which can happen on the thread that is emptying the stderr pipe, thus
causing the stderr pipe to deadlock on itself.

a-veitch/grpc,baylabs/grpc,yang-g/grpc,miselin/grpc,jtattermusch/grpc,MakMukhi/grpc,thinkerou/grpc,infinit/grpc,arkmaxim/grpc,perumaalgoog/grpc,a11r/grpc,jtattermusch/grpc,makdharma/grpc,andrewpollock/grpc,ipylypiv/grpc,Crevil/grpc,grani/grpc,ppietrasa/grpc,ncteisen/grpc,geffzhang/grpc,nicolasnoble/grpc,adelez/grpc,simonkuang/grpc,andrewpollock/grpc,makdharma/grpc,rjshade/grpc,jcanizales/grpc,pmarks-net/grpc,jcanizales/grpc,y-zeng/grpc,bogdandrutu/grpc,ejona86/grpc,podsvirov/grpc,vjpai/grpc,adelez/grpc,pszemus/grpc,MakMukhi/grpc,adelez/grpc,jboeuf/grpc,thinkerou/grpc,goldenbull/grpc,malexzx/grpc,PeterFaiman/ruby-grpc-minimal,baylabs/grpc,kumaralokgithub/grpc,Crevil/grpc,dgquintas/grpc,nicolasnoble/grpc,sreecha/grpc,geffzhang/grpc,zhimingxie/grpc,philcleveland/grpc,simonkuang/grpc,vsco/grpc,jtattermusch/grpc,pmarks-net/grpc,ejona86/grpc,perumaalgoog/grpc,Vizerai/grpc,ncteisen/grpc,jtattermusch/grpc,msmania/grpc,kriswuollett/grpc,baylabs/grpc,andrewpollock/grpc,kriswuollett/grpc,yongni/grpc,infinit/grpc,grpc/grpc,grani/grpc,stanley-cheung/grpc,podsvirov/grpc,murgatroid99/grpc,quizlet/grpc,thinkerou/grpc,msmania/grpc,tengyifei/grpc,zhimingxie/grpc,a-veitch/grpc,deepaklukose/grpc,pszemus/grpc,firebase/grpc,ipylypiv/grpc,msmania/grpc,goldenbull/grpc,msmania/grpc,vsco/grpc,simonkuang/grpc,kskalski/grpc,vjpai/grpc,thunderboltsid/grpc,ctiller/grpc,goldenbull/grpc,nicolasnoble/grpc,ppietrasa/grpc,thunderboltsid/grpc,jtattermusch/grpc,pszemus/grpc,jcanizales/grpc,ejona86/grpc,kskalski/grpc,Vizerai/grpc,matt-kwong/grpc,pszemus/grpc,philcleveland/grpc,ejona86/grpc,firebase/grpc,jtattermusch/grpc,sreecha/grpc,zhimingxie/grpc,arkmaxim/grpc,bogdandrutu/grpc,sreecha/grpc,dgquintas/grpc,ctiller/grpc,yongni/grpc,mehrdada/grpc,PeterFaiman/ruby-grpc-minimal,bogdandrutu/grpc,fuchsia-mirror/third_party-grpc,leifurhauks/grpc,vjpai/grpc,grani/grpc,malexzx/grpc,zhimingxie/grpc,pmarks-net/grpc,greasypizza/grpc,grpc/grpc,carl-mastrangelo/grpc,kpayson64/grpc,ncteisen/grpc,malexzx/grpc,daniel-j-born/grpc,deepaklukose/grpc,msmania/grpc,carl-mastrangelo/grpc,vjpai/grpc,muxi/grpc,fuchsia-mirror/third_party-grpc,infinit/grpc,msmania/grpc,rjshade/grpc,malexzx/grpc,baylabs/grpc,ncteisen/grpc,soltanmm/grpc,vsco/grpc,kpayson64/grpc,dklempner/grpc,7anner/grpc,soltanmm/grpc,LuminateWireless/grpc,apolcyn/grpc,miselin/grpc,jcanizales/grpc,carl-mastrangelo/grpc,Crevil/grpc,vsco/grpc,yugui/grpc,dklempner/grpc,a-veitch/grpc,philcleveland/grpc,LuminateWireless/grpc,ppietrasa/grpc,firebase/grpc,wcevans/grpc,tengyifei/grpc,leifurhauks/grpc,carl-mastrangelo/grpc,hstefan/grpc,jboeuf/grpc,yongni/grpc,grpc/grpc,goldenbull/grpc,soltanmm-google/grpc,zhimingxie/grpc,a11r/grpc,matt-kwong/grpc,firebase/grpc,ipylypiv/grpc,zhimingxie/grpc,a-veitch/grpc,thinkerou/grpc,soltanmm/grpc,Vizerai/grpc,ppietrasa/grpc,7anner/grpc,dgquintas/grpc,murgatroid99/grpc,tengyifei/grpc,y-zeng/grpc,bogdandrutu/grpc,mehrdada/grpc,soltanmm-google/grpc,Vizerai/grpc,leifurhauks/grpc,soltanmm-google/grpc,jcanizales/grpc,yang-g/grpc,dgquintas/grpc,Vizerai/grpc,philcleveland/grpc,andrewpollock/grpc,muxi/grpc,miselin/grpc,goldenbull/grpc,vjpai/grpc,dklempner/grpc,donnadionne/grpc,a-veitch/grpc,ncteisen/grpc,kumaralokgithub/grpc,yugui/grpc,greasypizza/grpc,Vizerai/grpc,a11r/grpc,kpayson64/grpc,thinkerou/grpc,grpc/grpc,hstefan/grpc,carl-mastrangelo/grpc,bogdandrutu/grpc,MakMukhi/grpc,wcevans/grpc,Vizerai/grpc,kriswuollett/grpc,miselin/grpc,kriswuollett/grpc,jboeuf/grpc,miselin/grpc,andrewpollock/grpc,carl-mastrangelo/grpc,kpayson64/grpc,thunderboltsid/grpc,a11r/grpc,stanley-cheung/grpc,vsco/grpc,thinkerou/grpc,mehrdada/grpc,tengyifei/grpc,Crevil/grpc,tengyifei/grpc,rjshade/grpc,murgatroid99/grpc,sreecha/grpc,ejona86/grpc,stanley-cheung/grpc,dgquintas/grpc,daniel-j-born/grpc,thunderboltsid/grpc,goldenbull/grpc,matt-kwong/grpc,wcevans/grpc,adelez/grpc,ctiller/grpc,thunderboltsid/grpc,soltanmm-google/grpc,vsco/grpc,wcevans/grpc,pszemus/grpc,pszemus/grpc,apolcyn/grpc,vjpai/grpc,kpayson64/grpc,firebase/grpc,matt-kwong/grpc,podsvirov/grpc,perumaalgoog/grpc,chrisdunelm/grpc,y-zeng/grpc,miselin/grpc,kumaralokgithub/grpc,leifurhauks/grpc,donnadionne/grpc,yang-g/grpc,matt-kwong/grpc,sreecha/grpc,infinit/grpc,kumaralokgithub/grpc,PeterFaiman/ruby-grpc-minimal,ctiller/grpc,stanley-cheung/grpc,7anner/grpc,y-zeng/grpc,jboeuf/grpc,kskalski/grpc,ipylypiv/grpc,ejona86/grpc,chrisdunelm/grpc,nicolasnoble/grpc,y-zeng/grpc,yongni/grpc,philcleveland/grpc,adelez/grpc,ananthonline/grpc,andrewpollock/grpc,muxi/grpc,soltanmm/grpc,ncteisen/grpc,rjshade/grpc,ppietrasa/grpc,VcamX/grpc,chrisdunelm/grpc,podsvirov/grpc,a11r/grpc,msmania/grpc,ejona86/grpc,kskalski/grpc,firebase/grpc,deepaklukose/grpc,miselin/grpc,geffzhang/grpc,carl-mastrangelo/grpc,simonkuang/grpc,vjpai/grpc,rjshade/grpc,grpc/grpc,thinkerou/grpc,Crevil/grpc,donnadionne/grpc,Crevil/grpc,yang-g/grpc,dklempner/grpc,greasypizza/grpc,matt-kwong/grpc,hstefan/grpc,pszemus/grpc,ananthonline/grpc,dgquintas/grpc,vjpai/grpc,baylabs/grpc,podsvirov/grpc,vjpai/grpc,hstefan/grpc,royalharsh/grpc,carl-mastrangelo/grpc,y-zeng/grpc,ejona86/grpc,chrisdunelm/grpc,kriswuollett/grpc,deepaklukose/grpc,jboeuf/grpc,murgatroid99/grpc,LuminateWireless/grpc,baylabs/grpc,kumaralokgithub/grpc,makdharma/grpc,jboeuf/grpc,malexzx/grpc,carl-mastrangelo/grpc,apolcyn/grpc,LuminateWireless/grpc,ipylypiv/grpc,a-veitch/grpc,donnadionne/grpc,soltanmm/grpc,yugui/grpc,infinit/grpc,hstefan/grpc,dgquintas/grpc,adelez/grpc,donnadionne/grpc,yongni/grpc,ipylypiv/grpc,grpc/grpc,murgatroid99/grpc,simonkuang/grpc,PeterFaiman/ruby-grpc-minimal,muxi/grpc,andrewpollock/grpc,ipylypiv/grpc,MakMukhi/grpc,ctiller/grpc,dklempner/grpc,kpayson64/grpc,carl-mastrangelo/grpc,deepaklukose/grpc,bogdandrutu/grpc,mehrdada/grpc,goldenbull/grpc,firebase/grpc,dklempner/grpc,malexzx/grpc,yugui/grpc,ncteisen/grpc,simonkuang/grpc,ananthonline/grpc,zhimingxie/grpc,pszemus/grpc,PeterFaiman/ruby-grpc-minimal,matt-kwong/grpc,fuchsia-mirror/third_party-grpc,mehrdada/grpc,wcevans/grpc,jtattermusch/grpc,leifurhauks/grpc,7anner/grpc,dklempner/grpc,daniel-j-born/grpc,nicolasnoble/grpc,quizlet/grpc,mehrdada/grpc,fuchsia-mirror/third_party-grpc,a11r/grpc,geffzhang/grpc,grani/grpc,apolcyn/grpc,perumaalgoog/grpc,matt-kwong/grpc,yugui/grpc,quizlet/grpc,jtattermusch/grpc,rjshade/grpc,ncteisen/grpc,thunderboltsid/grpc,firebase/grpc,malexzx/grpc,jboeuf/grpc,philcleveland/grpc,PeterFaiman/ruby-grpc-minimal,nicolasnoble/grpc,greasypizza/grpc,yugui/grpc,murgatroid99/grpc,kskalski/grpc,thinkerou/grpc,VcamX/grpc,dgquintas/grpc,yugui/grpc,ananthonline/grpc,thunderboltsid/grpc,infinit/grpc,arkmaxim/grpc,stanley-cheung/grpc,apolcyn/grpc,royalharsh/grpc,yugui/grpc,grani/grpc,yang-g/grpc,PeterFaiman/ruby-grpc-minimal,7anner/grpc,LuminateWireless/grpc,Vizerai/grpc,fuchsia-mirror/third_party-grpc,pmarks-net/grpc,ananthonline/grpc,geffzhang/grpc,y-zeng/grpc,kriswuollett/grpc,stanley-cheung/grpc,Vizerai/grpc,chrisdunelm/grpc,podsvirov/grpc,muxi/grpc,infinit/grpc,7anner/grpc,makdharma/grpc,quizlet/grpc,ncteisen/grpc,quizlet/grpc,hstefan/grpc,pmarks-net/grpc,kskalski/grpc,philcleveland/grpc,donnadionne/grpc,donnadionne/grpc,VcamX/grpc,mehrdada/grpc,goldenbull/grpc,sreecha/grpc,ctiller/grpc,yongni/grpc,pmarks-net/grpc,thinkerou/grpc,pszemus/grpc,rjshade/grpc,perumaalgoog/grpc,grpc/grpc,dklempner/grpc,kskalski/grpc,VcamX/grpc,soltanmm-google/grpc,VcamX/grpc,daniel-j-born/grpc,murgatroid99/grpc,sreecha/grpc,chrisdunelm/grpc,ppietrasa/grpc,jcanizales/grpc,bogdandrutu/grpc,LuminateWireless/grpc,nicolasnoble/grpc,philcleveland/grpc,ctiller/grpc,nicolasnoble/grpc,baylabs/grpc,yang-g/grpc,daniel-j-born/grpc,royalharsh/grpc,yang-g/grpc,firebase/grpc,yongni/grpc,quizlet/grpc,adelez/grpc,VcamX/grpc,kriswuollett/grpc,murgatroid99/grpc,ctiller/grpc,murgatroid99/grpc,kriswuollett/grpc,LuminateWireless/grpc,sreecha/grpc,firebase/grpc,mehrdada/grpc,daniel-j-born/grpc,ejona86/grpc,muxi/grpc,matt-kwong/grpc,carl-mastrangelo/grpc,y-zeng/grpc,grpc/grpc,kumaralokgithub/grpc,nicolasnoble/grpc,hstefan/grpc,royalharsh/grpc,grani/grpc,vjpai/grpc,dklempner/grpc,soltanmm-google/grpc,arkmaxim/grpc,vsco/grpc,perumaalgoog/grpc,jboeuf/grpc,murgatroid99/grpc,makdharma/grpc,mehrdada/grpc,ncteisen/grpc,greasypizza/grpc,thunderboltsid/grpc,ncteisen/grpc,tengyifei/grpc,tengyifei/grpc,grpc/grpc,daniel-j-born/grpc,malexzx/grpc,Vizerai/grpc,andrewpollock/grpc,grpc/grpc,pmarks-net/grpc,leifurhauks/grpc,geffzhang/grpc,vsco/grpc,sreecha/grpc,royalharsh/grpc,podsvirov/grpc,soltanmm-google/grpc,yugui/grpc,Crevil/grpc,nicolasnoble/grpc,yang-g/grpc,wcevans/grpc,arkmaxim/grpc,jboeuf/grpc,VcamX/grpc,geffzhang/grpc,geffzhang/grpc,thunderboltsid/grpc,Crevil/grpc,PeterFaiman/ruby-grpc-minimal,vjpai/grpc,jcanizales/grpc,makdharma/grpc,leifurhauks/grpc,Vizerai/grpc,goldenbull/grpc,tengyifei/grpc,a11r/grpc,perumaalgoog/grpc,ananthonline/grpc,fuchsia-mirror/third_party-grpc,deepaklukose/grpc,pmarks-net/grpc,simonkuang/grpc,jcanizales/grpc,apolcyn/grpc,ppietrasa/grpc,chrisdunelm/grpc,zhimingxie/grpc,a11r/grpc,royalharsh/grpc,philcleveland/grpc,ananthonline/grpc,ejona86/grpc,fuchsia-mirror/third_party-grpc,VcamX/grpc,pszemus/grpc,deepaklukose/grpc,thinkerou/grpc,ctiller/grpc,thinkerou/grpc,kskalski/grpc,yongni/grpc,chrisdunelm/grpc,fuchsia-mirror/third_party-grpc,ejona86/grpc,rjshade/grpc,kpayson64/grpc,muxi/grpc,sreecha/grpc,mehrdada/grpc,simonkuang/grpc,donnadionne/grpc,jtattermusch/grpc,MakMukhi/grpc,greasypizza/grpc,sreecha/grpc,yang-g/grpc,ctiller/grpc,bogdandrutu/grpc,infinit/grpc,perumaalgoog/grpc,andrewpollock/grpc,pszemus/grpc,wcevans/grpc,tengyifei/grpc,7anner/grpc,stanley-cheung/grpc,greasypizza/grpc,kpayson64/grpc,ctiller/grpc,jboeuf/grpc,mehrdada/grpc,arkmaxim/grpc,soltanmm/grpc,ncteisen/grpc,soltanmm-google/grpc,dgquintas/grpc,soltanmm/grpc,arkmaxim/grpc,stanley-cheung/grpc,ppietrasa/grpc,a11r/grpc,soltanmm/grpc,muxi/grpc,msmania/grpc,stanley-cheung/grpc,apolcyn/grpc,baylabs/grpc,leifurhauks/grpc,kskalski/grpc,soltanmm/grpc,pmarks-net/grpc,royalharsh/grpc,VcamX/grpc,ejona86/grpc,hstefan/grpc,7anner/grpc,msmania/grpc,7anner/grpc,donnadionne/grpc,apolcyn/grpc,dgquintas/grpc,deepaklukose/grpc,a-veitch/grpc,miselin/grpc,malexzx/grpc,grani/grpc,kpayson64/grpc,adelez/grpc,donnadionne/grpc,quizlet/grpc,jboeuf/grpc,MakMukhi/grpc,yongni/grpc,soltanmm-google/grpc,jtattermusch/grpc,kumaralokgithub/grpc,ananthonline/grpc,stanley-cheung/grpc,donnadionne/grpc,jtattermusch/grpc,fuchsia-mirror/third_party-grpc,makdharma/grpc,kpayson64/grpc,simonkuang/grpc,geffzhang/grpc,firebase/grpc,sreecha/grpc,rjshade/grpc,hstefan/grpc,infinit/grpc,makdharma/grpc,a-veitch/grpc,ananthonline/grpc,kpayson64/grpc,chrisdunelm/grpc,royalharsh/grpc,nicolasnoble/grpc,jboeuf/grpc,deepaklukose/grpc,stanley-cheung/grpc,stanley-cheung/grpc,daniel-j-born/grpc,chrisdunelm/grpc,ppietrasa/grpc,firebase/grpc,ipylypiv/grpc,mehrdada/grpc,podsvirov/grpc,zhimingxie/grpc,leifurhauks/grpc,pszemus/grpc,daniel-j-born/grpc,wcevans/grpc,ctiller/grpc,PeterFaiman/ruby-grpc-minimal,Crevil/grpc,MakMukhi/grpc,carl-mastrangelo/grpc,miselin/grpc,perumaalgoog/grpc,nicolasnoble/grpc,PeterFaiman/ruby-grpc-minimal,wcevans/grpc,LuminateWireless/grpc,jcanizales/grpc,jtattermusch/grpc,kumaralokgithub/grpc,vjpai/grpc,grpc/grpc,muxi/grpc,baylabs/grpc,y-zeng/grpc,quizlet/grpc,bogdandrutu/grpc,adelez/grpc,grani/grpc,fuchsia-mirror/third_party-grpc,arkmaxim/grpc,arkmaxim/grpc,donnadionne/grpc,apolcyn/grpc,kumaralokgithub/grpc,makdharma/grpc,MakMukhi/grpc,dgquintas/grpc,muxi/grpc,muxi/grpc,greasypizza/grpc,a-veitch/grpc,quizlet/grpc,vsco/grpc,LuminateWireless/grpc,royalharsh/grpc,grani/grpc,podsvirov/grpc,chrisdunelm/grpc,grpc/grpc,greasypizza/grpc,MakMukhi/grpc,kriswuollett/grpc,thinkerou/grpc,ipylypiv/grpc,muxi/grpc