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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_ */