Created attachment 402634 [details] strace output Hi, my default shell is "bash". I ssh into a box and start "tmux". I press "CTRL+b c" to create a new terminal. `ps faux` looks like [...] root 12077 0.1 0.0 14296 4452 pts/9 Ss+ 17:27 0:00 \_ -bash When I now exit the terminal (I enter "exit"), bash will crash. `ps faux` will now show [...] root 12077 0.0 0.0 0 0 ? Zs 17:27 0:00 \_ [bash] <defunct> I am attaching a strace log. # emerge --info app-shells/bash Portage 2.2.18 (python 3.4.3-final-0, default/linux/amd64/13.0, gcc-4.9.2, glibc-2.20-r2, 3.18.12-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.18.12-gentoo-x86_64-AMD_Opteron-tm-_Processor_6164_HE-with-gentoo-2.2 KiB Mem: 49391324 total, 37234080 free KiB Swap: 16777212 total, 16777212 free Timestamp of repository gentoo: Sun, 03 May 2015 18:45:01 +0000 sh bash 4.3_p33-r2 ld GNU ld (Gentoo 2.25 p1.0) 2.25 app-shells/bash: 4.3_p33-r2::gentoo dev-lang/perl: 5.20.2::gentoo dev-lang/python: 2.7.9-r2::gentoo, 3.4.3::gentoo dev-util/cmake: 3.2.1::gentoo dev-util/pkgconfig: 0.28-r2::gentoo sys-apps/baselayout: 2.2::gentoo sys-apps/openrc: 0.15::gentoo sys-apps/sandbox: 2.6-r1::gentoo sys-devel/autoconf: 2.69-r1::gentoo sys-devel/automake: 1.14.1::gentoo, 1.15::gentoo sys-devel/binutils: 2.25::gentoo sys-devel/gcc: 4.9.2::gentoo sys-devel/gcc-config: 1.8::gentoo sys-devel/libtool: 2.4.6-r1::gentoo sys-devel/make: 4.1-r1::gentoo sys-kernel/linux-headers: 3.18::gentoo (virtual/os-headers) sys-libs/glibc: 2.20-r2::gentoo ABI="amd64" ABI_X86="64" ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" ACCEPT_PROPERTIES="*" ACCEPT_RESTRICT="*" ARCH="amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=amdfam10 -mtune=amdfam10" CFLAGS_amd64="-m64" CFLAGS_x32="-mx32" CFLAGS_x86="-m32" CHOST="x86_64-pc-linux-gnu" CHOST_amd64="x86_64-pc-linux-gnu" CHOST_x32="x86_64-pc-linux-gnux32" CHOST_x86="i686-pc-linux-gnu" CPU_FLAGS_X86="3dnow 3dnowext mmx mmxext popcnt sse sse2 sse3 sse4a" CXXFLAGS="-O2 -pipe -march=amdfam10 -mtune=amdfam10" DEFAULT_ABI="amd64" ELIBC="glibc" ================================================================= Package Settings ================================================================= app-shells/bash-4.3_p33-r2::gentoo was built with the following: USE="net nls (readline) -afs -bashlogger -examples -mem-scramble -plugins -vanilla" ABI_X86="64"
i'm not seeing a crash in the strace or your ps output. looks more like tmux is failing to clean up after its children. defunct means bash has exited and the parent needs to wait() on it.
Yes you are right, the strace output shows nothing. And yes, I am only able to reproduce this with tmux (and only when tmux is starting bash, i.e. using zsh as shell, starting tmux, calling /bin/bash -> exit, doesn't trigger the problem). Screen for example works. I wondering what's causing this. I already downgraded most dependencies from tmux and bash. I have no idea where to start debugging this... but I can reproduce this on any of my ~ARCH systems. Any idea where I can start debugging?
what version of tmux are you using ?
I am seeing the problem with app-misc/tmux-1.9a::gentoo was built with the following: USE="-debug (-selinux) -vim-syntax" ABI_X86="64" and app-misc/tmux-2.0::gentoo was built with the following: USE="-debug (-selinux) -vim-syntax" ABI_X86="64"
Created attachment 402988 [details] tmux-strace.log tmux strace. 1) I started tmux (strace -s0 -f -o /tmp/tmux.log tmux) 2) Created a new window (CTRL+b c) 3) Closed the new window (2) via "exit" 4) Closed the first window via "exit" which terminated "tmux" root 96549 0.0 0.0 0 0 ? Zs 21:02 0:00 \_ [bash] <defunct> PID 96549 was the bash instance created in step 2 and which should be terminated in step 3. I turned off bash completion via /etc/bash/bashrc (I disabled the for loop sourcing /etc/bash/bashrc.d which contains bash_completion.sh) but this did not help.
Thomas Do you still experience this issue? Feel free to reopen if you do. Thanks! :)
