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Bash 3.0 Official Patch 11


From: Chet Ramey
Subject: Bash 3.0 Official Patch 11
Date: Wed, 8 Sep 2004 16:02:18 -0400 (EDT)

                             BASH PATCH REPORT
                             =================

Bash-Release: 3.0
Patch-ID: bash30-011

Bug-Reported-by: Egmont Koblinger <address@hidden>
Bug-Reference-ID: <address@hidden>
Bug-Reference-URL: 
http://lists.gnu.org/archive/html/bug-bash/2004-07/msg00277.html

Bug-Description:

I've just upgraded to readline 5.0 and bash 3.0 and tried them with UTF-8
encoding. I found line editing to be quite buggy:

I type an accented letter, let's say <E1>. Then <E1> appears. I press the left
arrow, the cursor goes back, it is now over <E1>. I press <E9>. Now <E9><E1> is
visible, which is correct, but the cursor is past the two letters, though
it should be over <E1>. Here only the first Left arrow takes affect, moves
the cursor over <E1>, but the 2nd time I press Left, it just beeps, doesn't
move to the first char (<E9>). Now a Right arrow doesn't move the cursor, but
causes further Left and Right arrows to work as expected. To go on,
similar bug occurs nearly every time that I insert an accented letter
before or amongs other ones (but not at the end of the line). When the
command line has about ten or twenty accented letters (and no or hardly
any non-accented ones), line editing becomes a total chaos, where
sometimes inserting another accented letter causes the cursor to jump many
characters to the right, and pressing the Left arrow sometimes causes the
cursor to jump back lots of characters at once.

Patch:

*** ../bash-3.0/lib/readline/mbutil.c   Wed Jan 14 09:44:52 2004
--- lib/readline/mbutil.c       Wed Aug 18 22:25:57 2004
***************
*** 127,135 ****
      {
        tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
!       while (wcwidth (wc) == 0)
        {
          point += tmp;
          tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
!         if (tmp == (size_t)(0) || tmp == (size_t)(-1) || tmp == (size_t)(-2))
            break;
        }
--- 127,135 ----
      {
        tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
!       while (tmp > 0 && wcwidth (wc) == 0)
        {
          point += tmp;
          tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps);
!         if (MB_NULLWCH (tmp) || MB_INVALIDCH (tmp))
            break;
        }

*** ../bash-3.0/patchlevel.h    Wed Aug 22 08:05:39 2001
--- patchlevel.h        Thu Sep  2 15:04:32 2004
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 10
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 11
  
  #endif /* _PATCHLEVEL_H_ */




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