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+ READLINE PATCH REPORT
+ =====================
+
+Readline-Release: 5.2
+Patch-ID: readline52-006
+
+Bug-Reported-by: Peter Volkov <torre_cremata@mail.ru>
+Bug-Reference-ID: <1178376645.9063.25.camel@localhost>
+Bug-Reference-URL: http://bugs.gentoo.org/177095
+
+Bug-Description:
+
+The readline display code miscalculated the screen position when performing
+a redisplay in which the new text occupies more screen space that the old,
+but takes fewer bytes to do so (e.g., when replacing a shorter string
+containing multibyte characters with a longer one containing only ASCII).
+
+Patch:
+
+*** ../readline-5.2/display.c Thu Apr 26 11:38:22 2007
+--- display.c Thu Jul 12 23:10:10 2007
+***************
+*** 1519,1527 ****
+ /* Non-zero if we're increasing the number of lines. */
+ int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
+ /* Sometimes it is cheaper to print the characters rather than
+ use the terminal's capabilities. If we're growing the number
+ of lines, make sure we actually cause the new line to wrap
+ around on auto-wrapping terminals. */
+! if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
+ {
+ /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and
+--- 1568,1596 ----
+ /* Non-zero if we're increasing the number of lines. */
+ int gl = current_line >= _rl_vis_botlin && inv_botlin > _rl_vis_botlin;
++ /* If col_lendiff is > 0, implying that the new string takes up more
++ screen real estate than the old, but lendiff is < 0, meaning that it
++ takes fewer bytes, we need to just output the characters starting
++ from the first difference. These will overwrite what is on the
++ display, so there's no reason to do a smart update. This can really
++ only happen in a multibyte environment. */
++ if (lendiff < 0)
++ {
++ _rl_output_some_chars (nfd, temp);
++ _rl_last_c_pos += _rl_col_width (nfd, 0, temp);
++ /* If nfd begins before any invisible characters in the prompt,
++ adjust _rl_last_c_pos to account for wrap_offset and set
++ cpos_adjusted to let the caller know. */
++ if (current_line == 0 && wrap_offset && ((nfd - new) <= prompt_last_invisible))
++ {
++ _rl_last_c_pos -= wrap_offset;
++ cpos_adjusted = 1;
++ }
++ return;
++ }
+ /* Sometimes it is cheaper to print the characters rather than
+ use the terminal's capabilities. If we're growing the number
+ of lines, make sure we actually cause the new line to wrap
+ around on auto-wrapping terminals. */
+! else if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
+ {
+ /* If lendiff > prompt_visible_length and _rl_last_c_pos == 0 and