From http://ftp.gnu.org/pub/gnu/readline/readline-6.3-patches/readline63-002 Signed-off-by: Gustavo Zacarias READLINE PATCH REPORT ===================== Readline-Release: 6.3 Patch-ID: readline63-002 Bug-Reported-by: Anatol Pomozov Bug-Reference-ID: Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00010.html Bug-Description: When in callback mode, some readline commands can cause readline to seg fault by passing invalid contexts to callback functions. Patch (apply with `patch -p0'): *** a/readline-6.3/readline.c 2013-10-28 14:58:06.000000000 -0400 --- b/readline.c 2014-03-10 14:15:02.000000000 -0400 *************** *** 745,749 **** RL_CHECK_SIGNALS (); ! if (r == 0) /* success! */ { _rl_keyseq_chain_dispose (); --- 745,750 ---- RL_CHECK_SIGNALS (); ! /* We only treat values < 0 specially to simulate recursion. */ ! if (r >= 0 || (r == -1 && (cxt->flags & KSEQ_SUBSEQ) == 0)) /* success! or failure! */ { _rl_keyseq_chain_dispose (); *** a/readline-6.3/patchlevel 2013-11-15 08:11:11.000000000 -0500 --- b/patchlevel 2014-03-21 08:28:40.000000000 -0400 *************** *** 1,3 **** # Do not edit -- exists only for use by patch ! 1 --- 1,3 ---- # Do not edit -- exists only for use by patch ! 2