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BASH PATCH REPORT
=================
Bash-Release: 4.2
Patch-ID: bash42-009
Bug-Reported-by: <piuma@piumalab.org>
Bug-Reference-ID: <4DAAC0DB.7060606@piumalab.org>
Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2011-04/msg00075.html
Bug-Description:
Under certain circumstances, running `fc -l' two times in succession with a
relative history offset at the end of the history will result in an incorrect
calculation of the last history entry and a seg fault.
Patch (apply with `patch -p0'):
*** ../bash-4.2-patched/builtins/fc.def 2010-05-30 18:25:38.000000000 -0400
--- ./builtins/fc.def 2011-04-19 15:46:17.000000000 -0400
***************
*** 305,309 ****
/* XXX */
! if (saved_command_line_count > 0 && i == last_hist && hlist[last_hist] == 0)
while (last_hist >= 0 && hlist[last_hist] == 0)
last_hist--;
--- 305,309 ----
/* XXX */
! if (i == last_hist && hlist[last_hist] == 0)
while (last_hist >= 0 && hlist[last_hist] == 0)
last_hist--;
***************
*** 476,480 ****
{
int sign, n, clen, rh;
! register int i, j;
register char *s;
--- 476,480 ----
{
int sign, n, clen, rh;
! register int i, j, last_hist;
register char *s;
***************
*** 496,500 ****
calculation as if it were on. */
rh = remember_on_history || ((subshell_environment & SUBSHELL_COMSUB) && enable_history_list);
! i -= rh + hist_last_line_added;
/* No specification defaults to most recent command. */
--- 496,508 ----
calculation as if it were on. */
rh = remember_on_history || ((subshell_environment & SUBSHELL_COMSUB) && enable_history_list);
! last_hist = i - rh - hist_last_line_added;
!
! if (i == last_hist && hlist[last_hist] == 0)
! while (last_hist >= 0 && hlist[last_hist] == 0)
! last_hist--;
! if (last_hist < 0)
! return (-1);
!
! i = last_hist;
/* No specification defaults to most recent command. */
*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
--- ./patchlevel.h Thu Feb 24 21:41:34 2011
***************
*** 26,30 ****
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 8
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 9
#endif /* _PATCHLEVEL_H_ */
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