[Bug 1294669] Re: bash crashed with SIGABRT in programming_error()

[siggy1]

Core dump generated by bash after a fresh 32bit Desktop installation of Ubuntu 14.04 LTS with empty home directory.
Bash ! also crashes shells on both Ubuntu Live Installer CDs 32+64 bit

siggy $ gdb /bin/bash core
GNU gdb (Ubuntu 7.7-0ubuntu3) 7.7
...
Reading symbols from /bin/bash...(no debugging symbols found)...done.
[New LWP 19996]
Core was generated by `bash'.
Program terminated with signal SIGABRT, Aborted.
#0  0xb7706424 in __kernel_vsyscall ()
(gdb) backtrace
#0  0xb7706424 in __kernel_vsyscall ()
#1  0xb7545827 in __GI_raise (sig=sig at entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#2  0xb7548d24 in __GI_abort () at abort.c:118
#3  0x08084733 in programming_error ()
#4  0x080fb4ed in ?? ()
#5  0x080fc083 in ?? ()
#6  0x080b9358 in sh_xrealloc ()
#7  0x0806660b in ?? ()
#8  0x08069472 in ?? ()
#9  0x0806c836 in yyparse ()
#10 0x08063b9e in parse_command ()
#11 0x08063c72 in read_command ()
#12 0x08063e5b in reader_loop ()
#13 0x0806218f in main ()
(gdb)

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https://bugs.launchpad.net/bugs/1294669

Title:
  bash crashed with SIGABRT in programming_error()

Status in “bash” package in Ubuntu:
  In Progress
Status in “bash” source package in Trusty:
  In Progress

Bug description:
  bash just died under me, I think I was just doing cursor up to get a
  previous command and it segfaulted.  This has happened several times
  this week and is getting annoying

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: bash 4.3-2ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-16.36-lowlatency 3.13.5
  Uname: Linux 3.13.0-16-lowlatency x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: Unity
  Date: Wed Mar 19 14:08:22 2014
  EcryptfsInUse: Yes
  ExecutablePath: /bin/bash
  InstallationDate: Installed on 2013-12-09 (99 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131209)
  ProcCmdline: bash
  Signal: 6
  SourcePackage: bash
  StacktraceTop:
   programming_error ()
   ?? ()
   sh_xrealloc ()
   ?? ()
   ?? ()
  Title: bash crashed with SIGABRT in programming_error()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sbuild sudo

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