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readline fix for rl_undo_list pointer aliasing; arith command sets word_top

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This commit is contained in:
Chet Ramey
2023-03-06 10:50:45 -05:00
parent 0bd0fb5966
commit 277c21d2b2
14 changed files with 414 additions and 32 deletions
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lib/readline/misc.c
+13 -8
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@@ -340,6 +340,9 @@ rl_maybe_replace_line (void)
xfree (temp->line);
FREE (temp->timestamp);
xfree (temp);
/* XXX - what about _rl_saved_line_for_history? if the saved undo list
is rl_undo_list, and we just put that into a history entry, should
we set the saved undo list to NULL? */
}
return 0;
}
@@ -385,14 +388,16 @@ _rl_free_saved_history_line (void)
{
if (_rl_saved_line_for_history)
{
if (rl_undo_list && rl_undo_list == (UNDO_LIST *)_rl_saved_line_for_history->data)
rl_undo_list = 0;
/* Have to free this separately because _rl_free_history entry can't:
it doesn't know whether or not this has application data. Only the
callers that know this is _rl_saved_line_for_history can know that
it's an undo list. */
if (_rl_saved_line_for_history->data)
_rl_free_undo_list ((UNDO_LIST *)_rl_saved_line_for_history->data);
UNDO_LIST *sentinel;
sentinel = (UNDO_LIST *)_rl_saved_line_for_history->data;
/* We should only free `data' if it's not the current rl_undo_list and
it's not the `data' member in a history entry somewhere. We have to
free it separately because only the callers know it's an undo list. */
if (sentinel && sentinel != rl_undo_list && _hs_search_history_data ((histdata_t *)sentinel) < 0)
_rl_free_undo_list (sentinel);
_rl_free_history_entry (_rl_saved_line_for_history);
_rl_saved_line_for_history = (HIST_ENTRY *)NULL;
}