[Bug 1289933] Re: python 2.7 crashed when I went to type in a print statement

[Matthias Klose]

this was an issue in readline 6.3, now fixed in trusty


** Changed in: python2.7 (Ubuntu)
       Status: New => Fix Released

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1289933

Title:
  python 2.7 crashed when I went to type in a print statement

Status in “python2.7” package in Ubuntu:
  Fix Released

Bug description:
  I am using Ubuntu 14.04 Alpha 1
  I am also using Python 2.7
  I had switched windows from the Chromium browser to the terminal and had started to enter a print statement in the interactive python interpreter when I noticed that I had made a mistake and typed a '[' instead of a 'p'.  When I went to correct my mistake, the following was output to the interpreter: "Segmentation fault (core dumped)".
  I had expected to be able to delete the '[' character and replace it with a 'p' character in order to type a correct print statement.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: python2.7-minimal 2.7.6-7
  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: Sat Mar  8 22:35:57 2014
  ExecutablePath: /usr/bin/python2.7
  InstallationDate: Installed on 2014-03-08 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140307)
  ProcCmdline: python
  SegvAnalysis:
   Segfault happened at: 0x7f9331493209 <_rl_dispatch_callback+9>:	testb  $0x1,(%rdi)
   PC (0x7f9331493209) ok
   source "$0x1" ok
   destination "(%rdi)" (0x00000000) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: python2.7
  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 ()
   PyTokenizer_Get ()
  Title: python2.7 crashed with SIGSEGV in _rl_dispatch_callback()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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