On Fri, May 29, 2020 at 11:40 AM Chet Ramey <chet.ra...@case.edu> wrote: > > On 5/28/20 6:12 PM, Keith Thompson wrote: > > Configuration Information [Automatically generated, do not change]: > > Machine: x86_64 > > OS: linux-gnu > > Compiler: gcc > > Compilation CFLAGS: -g -Wno-parentheses -Wno-format-security > > uname output: Linux bomb20 5.4.0-31-generic #35-Ubuntu SMP Thu May 7 > > 20:20:34 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux > > Machine Type: x86_64-pc-linux-gnu > > > > Bash Version: 5.0 > > Patch Level: 16 > > Release Status: release > > > > Description: > > bash crashes with a segmentation fault on the command: > > echo ~nosuchuser > > (This assumes there is no user named "nosuchuser". If there > > is, pick a different name). > > > > It's likely this isn't a bug in bash itself, but I haven't > > been able to figure out what's going on. > > > > I see this problem on copies of bash 5.0.16 and 5.0.17 built from > > sourced on Ubuntu 20.04 LTS. It does *not* occur with the /bin/bash > > GNU bash, version 5.0.16(1)-release (x86_64-pc-linux-gnu) > > provided by the distribution. I haven't verified how far > > back this goes. > > Can you try this with the current devel branch head from savannah? I > have a suspicion about what's going on. > > http://git.savannah.gnu.org/cgit/bash.git/snapshot/bash-devel.tar.gz
This did not reproduce the bug. $ ./bash --version GNU bash, version 5.1.0(1)-alpha (x86_64-pc-linux-gnu) Copyright (C) 2020 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software; you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. $ ./bash -c 'echo ~nosuchuser' ~nosuchuser $
