From https://ftp.gnu.org/gnu/bash/bash-5.0-patches/bash50-012 Signed-off-by: Fabrice Fontaine BASH PATCH REPORT ================= Bash-Release: 5.0 Patch-ID: bash50-012 Bug-Reported-by: lessbug@qq.com Bug-Reference-ID: Bug-Reference-URL: Bug-Description: When using previous-history to go back beyond the beginning of the history list, it's possible to move to an incorrect partial line. Patch (apply with `patch -p0'): *** ../bash-5.0-patched/lib/readline/misc.c 2017-07-07 17:30:12.000000000 -0400 --- b/lib/readline/misc.c 2019-05-16 11:43:46.000000000 -0400 *************** *** 577,580 **** --- 590,594 ---- { HIST_ENTRY *old_temp, *temp; + int had_saved_line; if (count < 0) *************** *** 589,592 **** --- 603,607 ---- /* If we don't have a line saved, then save this one. */ + had_saved_line = _rl_saved_line_for_history != 0; rl_maybe_save_line (); *************** *** 612,616 **** if (temp == 0) { ! rl_maybe_unsave_line (); rl_ding (); } --- 627,632 ---- if (temp == 0) { ! if (had_saved_line == 0) ! _rl_free_saved_history_line (); rl_ding (); } *** ../bash-5.0/patchlevel.h 2016-06-22 14:51:03.000000000 -0400 --- b/patchlevel.h 2016-10-01 11:01:28.000000000 -0400 *************** *** 26,30 **** looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 11 #endif /* _PATCHLEVEL_H_ */ --- 26,30 ---- looks for to find the patch level (for the sccs version string). */ ! #define PATCHLEVEL 12 #endif /* _PATCHLEVEL_H_ */