zsh: segmentation fault (core dumped) sudo -i

[Hadmut Danisch]

Hi,

since I've upgraded from 16.04 to 16.10, the zsh crashes quite often with a segmentation fault.

I've noticed that this occurs not always, but if, then always in these two cases:

- calling ls (in my case an alias for ls -F and thus the internal ls function)

- using file name completion

which both are related to opening directories and reading their contents. I've done a strace, which seems to confirm this (crashing within ls):

...

6781 open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
6781 fstat(3, {st_mode=S_IFDIR|0700, st_size=806, ...}) = 0
6781 lseek(3, 0, SEEK_SET) = 0
6781 --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=0} ---
6781 +++ killed by SIGSEGV (core dumped) +++

which again implies problems pretty close to opening directories.

regards

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: zsh 5.2-5ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic x86_64
NonfreeKernelModules: zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: XFCE
Date: Tue Oct 18 14:31:18 2016
InstallationDate: Installed on 2016-04-22 (178 days ago)
InstallationMedia: Lubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420)
SourcePackage: zsh
UpgradeStatus: Upgraded to yakkety on 2016-10-17 (1 days ago)

[Hadmut Danisch (hadmut)]

Sorry, I've made a mistake. The bug occured with the tcsh, not the zsh. A usermod to set the shell to zsh had failed, and the bug message mentioning zsh came from the outer zsh (from where sudo was run), that's why I believed a zsh had crashed.