[Bug 1290287] Re: ipython crashed with SIGSEGV in _rl_dispatch_callback()

[Julian Taylor]

its a readline issue

patch available here
http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00031.html
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=741555

** Bug watch added: Debian Bug tracker #741555
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=741555

** Attachment removed: "Stacktrace.txt"
   https://bugs.launchpad.net/ubuntu/+source/ipython/+bug/1290287/+attachment/4016243/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/ubuntu/+source/ipython/+bug/1290287/+attachment/4016244/+files/ThreadStacktrace.txt

** Attachment removed: "Stacktrace.txt"
   https://bugs.launchpad.net/ubuntu/+source/ipython/+bug/1290287/+attachment/4016295/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/ubuntu/+source/ipython/+bug/1290287/+attachment/4016297/+files/ThreadStacktrace.txt

** Information type changed from Private to Public

** Package changed: ipython (Ubuntu) => readline6 (Ubuntu)

** Changed in: readline6 (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: readline6 (Ubuntu)
   Importance: Medium => High

** Also affects: readline6 (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=741555
   Importance: Unknown
       Status: Unknown

** Tags added: patch

** Attachment removed: "StacktraceSource.txt"
   https://bugs.launchpad.net/debian/+source/readline6/+bug/1290287/+attachment/4016296/+files/StacktraceSource.txt

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https://bugs.launchpad.net/bugs/1290287

Title:
  ipython crashed with SIGSEGV in _rl_dispatch_callback()

Status in “readline6” package in Ubuntu:
  Triaged
Status in “readline6” package in Debian:
  Unknown

Bug description:
  Was exploring base64 module, tried to decode "foo" a few times with
  different variations, when I came back to the terminal (note it was
  running in byobu) I saw the segfault

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: ipython 1.2.1-2
  ProcVersionSignature: Ubuntu 3.13.0-16.36-generic 3.13.5
  Uname: Linux 3.13.0-16-generic x86_64
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Mar 10 11:26:49 2014
  ExecutablePath: /usr/bin/ipython
  InstallationDate: Installed on 2012-08-17 (569 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.1)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/ipython
  SegvAnalysis:
   Segfault happened at: 0x7f3188b42209 <_rl_dispatch_callback+9>:	testb  $0x1,(%rdi)
   PC (0x7f3188b42209) ok
   source "$0x1" ok
   destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: ipython
  StacktraceTop:
   _rl_dispatch_callback () from /lib/x86_64-linux-gnu/libreadline.so.6
   rl_callback_read_char () from /lib/x86_64-linux-gnu/libreadline.so.6
   ?? () from /usr/lib/python2.7/lib-dynload/readline.x86_64-linux-gnu.so
   PyOS_Readline ()
   ?? ()
  Title: ipython crashed with SIGSEGV in _rl_dispatch_callback()
  UpgradeStatus: Upgraded to trusty on 2014-02-08 (29 days ago)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo

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