source: patches/readline-5.2-fixes-5.patch@ c94176e

readline-5.2

@@ -428 +428 @@
         return (1);
       if (c == 'n' || c == 'N' || c == RUBOUT)
         return (0);
-      if (c == ABORT_CHAR)
+      if (c == ABORT_CHAR || c < 0)
         _rl_abort_internal ();
       if (for_pager && (c == NEWLINE || c == RETURN))
         return (2);

readline-5.2

@@ -391 +391 @@
       t = ++p;
       local_prompt = expand_prompt (p, &prompt_visible_length,
                                        &prompt_last_invisible,
-                                       (int *)NULL,
+                                       &prompt_invis_chars_first_line,
                                        &prompt_physical_chars);
       c = *t; *t = '\0';
       /* The portion of the prompt string up to and including the
          final newline is now null-terminated. */
       local_prompt_prefix = expand_prompt (prompt, &prompt_prefix_length,
                                                    (int *)NULL,
-                                                   &prompt_invis_chars_first_line,
+                                                   (int *)NULL,
                                                    (int *)NULL);
       *t = c;
       local_prompt_len = local_prompt ? strlen (local_prompt) : 0;
@@ -561 +561 @@
       wrap_offset = prompt_invis_chars_first_line = 0;
     }
 
+#if defined (HANDLE_MULTIBYTE)
+#define CHECK_INV_LBREAKS() \
+      do { \
+        if (newlines >= (inv_lbsize - 2)) \
+          { \
+            inv_lbsize *= 2; \
+            inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
+            _rl_wrapped_line = (int *)xrealloc (_rl_wrapped_line, inv_lbsize * sizeof (int)); \
+          } \
+      } while (0)
+#else
 #define CHECK_INV_LBREAKS() \
       do { \
         if (newlines >= (inv_lbsize - 2)) \
@@ -569 +580 @@
             inv_lbreaks = (int *)xrealloc (inv_lbreaks, inv_lbsize * sizeof (int)); \
           } \
       } while (0)
+#endif /* HANDLE_MULTIBYTE */
 
 #if defined (HANDLE_MULTIBYTE)    
 #define CHECK_LPOS() \
@@ -898 +910 @@
              second and subsequent lines start at inv_lbreaks[N], offset by
              OFFSET (which has already been calculated above).  */
 
+#define INVIS_FIRST()   (prompt_physical_chars > _rl_screenwidth ? prompt_invis_chars_first_line : wrap_offset)
+#define WRAP_OFFSET(line, offset)  ((line == 0) \
+                                        ? (offset ? INVIS_FIRST() : 0) \
+                                        : ((line == prompt_last_screen_line) ? wrap_offset-prompt_invis_chars_first_line : 0))
 #define W_OFFSET(line, offset) ((line) == 0 ? offset : 0)
 #define VIS_LLEN(l)     ((l) > _rl_vis_botlin ? 0 : (vis_lbreaks[l+1] - vis_lbreaks[l]))
 #define INV_LLEN(l)     (inv_lbreaks[l+1] - inv_lbreaks[l])
@@ -932 +948 @@
                   _rl_last_c_pos != o_cpos &&
                   _rl_last_c_pos > wrap_offset &&
                   o_cpos < prompt_last_invisible)
-                _rl_last_c_pos -= wrap_offset;
+                _rl_last_c_pos -= prompt_invis_chars_first_line;        /* XXX - was wrap_offset */
+              else if (linenum == prompt_last_screen_line && prompt_physical_chars > _rl_screenwidth &&
+                        (MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
+                        cpos_adjusted == 0 &&
+                        _rl_last_c_pos != o_cpos &&
+                        _rl_last_c_pos > (prompt_last_invisible - _rl_screenwidth - prompt_invis_chars_first_line))
+                _rl_last_c_pos -= (wrap_offset-prompt_invis_chars_first_line);
                   
               /* If this is the line with the prompt, we might need to
                  compensate for invisible characters in the new line. Do
@@ -1036 +1058 @@
                 tx = _rl_col_width (&visible_line[pos], 0, nleft) - visible_wrap_offset;
               else
                 tx = nleft;
-              if (_rl_last_c_pos > tx)
+              if (tx >= 0 && _rl_last_c_pos > tx)
                 {
                   _rl_backspace (_rl_last_c_pos - tx);  /* XXX */
                   _rl_last_c_pos = tx;
@@ -1192 +1214 @@
      int current_line, omax, nmax, inv_botlin;
 {
   register char *ofd, *ols, *oe, *nfd, *nls, *ne;
-  int temp, lendiff, wsatend, od, nd;
+  int temp, lendiff, wsatend, od, nd, twidth, o_cpos;
   int current_invis_chars;
   int col_lendiff, col_temp;
 #if defined (HANDLE_MULTIBYTE)
@@ -1208 +1230 @@
   if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
     temp = _rl_last_c_pos;
   else
-    temp = _rl_last_c_pos - W_OFFSET(_rl_last_v_pos, visible_wrap_offset);
+    temp = _rl_last_c_pos - WRAP_OFFSET (_rl_last_v_pos, visible_wrap_offset);
   if (temp == _rl_screenwidth && _rl_term_autowrap && !_rl_horizontal_scroll_mode
         && _rl_last_v_pos == current_line - 1)
     {
@@ -1453 +1475 @@
         _rl_last_c_pos = lendiff;
     }
 
+  o_cpos = _rl_last_c_pos;
+
   /* When this function returns, _rl_last_c_pos is correct, and an absolute
      cursor postion in multibyte mode, but a buffer index when not in a
      multibyte locale. */
@@ -1462 +1486 @@
   /* We need to indicate that the cursor position is correct in the presence of
      invisible characters in the prompt string.  Let's see if setting this when
      we make sure we're at the end of the drawn prompt string works. */
-  if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && _rl_last_c_pos == prompt_physical_chars)
+  if (current_line == 0 && MB_CUR_MAX > 1 && rl_byte_oriented == 0 && 
+      (_rl_last_c_pos > 0 || o_cpos > 0) &&
+      _rl_last_c_pos == prompt_physical_chars)
     cpos_adjusted = 1;
 #endif
 #endif
@@ -1506 +1532 @@
     {
       /* 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. */
-      if (_rl_terminal_can_insert && ((2 * col_temp) >= col_lendiff || _rl_term_IC) && (!_rl_term_autowrap || !gl))
+      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
              _rl_horizontal_scroll_mode == 1, inserting the characters with
@@ -1533 +1579 @@
             }
           else
             {
-              /* We have horizontal scrolling and we are not inserting at
-                 the end.  We have invisible characters in this line.  This
-                 is a dumb update. */
               _rl_output_some_chars (nfd, temp);
               _rl_last_c_pos += col_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;
             }
           /* Copy (new) chars to screen from first diff to last match. */
@@ -1545 +1596 @@
           if ((temp - lendiff) > 0)
             {
               _rl_output_some_chars (nfd + lendiff, temp - lendiff);
-#if 1
              /* XXX -- this bears closer inspection.  Fixes a redisplay bug
                 reported against bash-3.0-alpha by Andreas Schwab involving
                 multibyte characters and prompt strings with invisible
                 characters, but was previously disabled. */
-              _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-col_lendiff);
-#else
-              _rl_last_c_pos += _rl_col_width (nfd+lendiff, 0, temp-lendiff);
-#endif
+              if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+                twidth = _rl_col_width (nfd+lendiff, 0, temp-col_lendiff);
+              else
+                twidth = temp - lendiff;
+              _rl_last_c_pos += twidth;
             }
         }
       else
@@ -1586 +1637 @@
           temp = nls - nfd;
           if (temp > 0)
             {
+              /* If nfd begins at the prompt, or before the invisible
+                 characters in the prompt, we need to adjust _rl_last_c_pos
+                 in a multibyte locale to account for the wrap offset and
+                 set cpos_adjusted accordingly. */
               _rl_output_some_chars (nfd, temp);
-              _rl_last_c_pos += _rl_col_width (nfd, 0, temp);;
+              if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+                {
+                  _rl_last_c_pos += _rl_col_width (nfd, 0, temp);
+                  if (current_line == 0 && wrap_offset &&  ((nfd - new) <= prompt_last_invisible))
+                    {
+                      _rl_last_c_pos -= wrap_offset;
+                      cpos_adjusted = 1;
+                    }
+                }
+              else
+                _rl_last_c_pos += temp;
             }
         }
       /* Otherwise, print over the existing material. */
@@ -1595 +1660 @@
         {
           if (temp > 0)
             {
+              /* If nfd begins at the prompt, or before the invisible
+                 characters in the prompt, we need to adjust _rl_last_c_pos
+                 in a multibyte locale to account for the wrap offset and
+                 set cpos_adjusted accordingly. */
               _rl_output_some_chars (nfd, temp);
               _rl_last_c_pos += col_temp;               /* XXX */
+              if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
+                {
+                  if (current_line == 0 && wrap_offset &&  ((nfd - new) <= prompt_last_invisible))
+                    {
+                      _rl_last_c_pos -= wrap_offset;
+                      cpos_adjusted = 1;
+                    }
+                }
             }
           lendiff = (oe - old) - (ne - new);
           if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
@@ -1721 +1798 @@
   int woff;                     /* number of invisible chars on current line */
   int cpos, dpos;               /* current and desired cursor positions */
 
-  woff = W_OFFSET (_rl_last_v_pos, wrap_offset);
+  woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset);
   cpos = _rl_last_c_pos;
 #if defined (HANDLE_MULTIBYTE)
   /* If we have multibyte characters, NEW is indexed by the buffer point in
@@ -1732 +1809 @@
   if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
     {
       dpos = _rl_col_width (data, 0, new);
-      if (dpos > prompt_last_invisible)         /* XXX - don't use woff here */
+      /* Use NEW when comparing against the last invisible character in the
+         prompt string, since they're both buffer indices and DPOS is a
+         desired display position. */
+      if ((new > prompt_last_invisible) ||              /* XXX - don't use woff here */
+          (prompt_physical_chars > _rl_screenwidth &&
+           _rl_last_v_pos == prompt_last_screen_line &&
+           wrap_offset != woff &&
+           new > (prompt_last_invisible-_rl_screenwidth-wrap_offset)))
         {
           dpos -= woff;
           /* Since this will be assigned to _rl_last_c_pos at the end (more
@@ -2380 +2464 @@
 
   if (end <= start)
     return 0;
+  if (MB_CUR_MAX == 1 || rl_byte_oriented)
+    return (end - start);
 
   memset (&ps, 0, sizeof (mbstate_t));
 

readline-5.2

@@ -133 +133 @@
     return (0);
 
   *key = ibuffer[pop_index++];
-
+#if 0
   if (pop_index >= ibuffer_len)
+#else
+  if (pop_index > ibuffer_len)
+#endif
     pop_index = 0;
 
   return (1);
@@ -151 +154 @@
     {
       pop_index--;
       if (pop_index < 0)
-        pop_index = ibuffer_len - 1;
+        pop_index = ibuffer_len;
       ibuffer[pop_index] = key;
       return (1);
     }
@@ -250 +253 @@
       while (chars_avail--)
         {
           k = (*rl_getc_function) (rl_instream);
-          rl_stuff_char (k);
+          if (rl_stuff_char (k) == 0)
+            break;                      /* some problem; no more room */
           if (k == NEWLINE || k == RETURN)
             break;
         }
@@ -373 +377 @@
       RL_SETSTATE (RL_STATE_INPUTPENDING);
     }
   ibuffer[push_index++] = key;
+#if 0
   if (push_index >= ibuffer_len)
+#else
+  if (push_index > ibuffer_len)
+#endif
     push_index = 0;
 
   return 1;
@@ -513 +521 @@
      char *mbchar;
      int size;
 {
-  int mb_len = 0;
+  int mb_len, c;
   size_t mbchar_bytes_length;
   wchar_t wc;
   mbstate_t ps, ps_back;
 
   memset(&ps, 0, sizeof (mbstate_t));
   memset(&ps_back, 0, sizeof (mbstate_t));
-  
+
+  mb_len = 0;  
   while (mb_len < size)
     {
       RL_SETSTATE(RL_STATE_MOREINPUT);
-      mbchar[mb_len++] = rl_read_key ();
+      c = rl_read_key ();
       RL_UNSETSTATE(RL_STATE_MOREINPUT);
 
+      if (c < 0)
+        break;
+
+      mbchar[mb_len++] = c;
+
       mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps);
       if (mbchar_bytes_length == (size_t)(-1))
         break;          /* invalid byte sequence for the current locale */
@@ -564 +578 @@
 
   c = first;
   memset (mb, 0, mlen);
-  for (i = 0; i < mlen; i++)
+  for (i = 0; c >= 0 && i < mlen; i++)
     {
       mb[i] = (char)c;
       memset (&ps, 0, sizeof (mbstate_t));

readline-5.2

@@ -327 +327 @@
   rl_command_func_t *f;
 
   f = (rl_command_func_t *)NULL;
- 
- /* Translate the keys we do something with to opcodes. */
+
+  if (c < 0)
+    {
+      cxt->sflags |= SF_FAILED;
+      cxt->history_pos = cxt->last_found_line;
+      return -1;
+    }
+
+  /* Translate the keys we do something with to opcodes. */
   if (c >= 0 && _rl_keymap[c].type == ISFUNC)
     {
       f = _rl_keymap[c].function;

readline-5.2

@@ -146 +146 @@
           rl_restore_prompt ();
           rl_clear_message ();
           RL_UNSETSTATE(RL_STATE_NUMERICARG);
+          if (key < 0)
+            return -1;
           return (_rl_dispatch (key, _rl_keymap));
         }
     }

readline-5.2

@@ -645 +645 @@
   if ((cxt->flags & KSEQ_DISPATCHED) == 0)
     {
       nkey = _rl_subseq_getchar (cxt->okey);
+      if (nkey < 0)
+        {
+          _rl_abort_internal ();
+          return -1;
+        }
       r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg);
       cxt->flags |= KSEQ_DISPATCHED;
     }

support/shobj-conf

@@ -10 +10 @@
 # Chet Ramey
 # chet@po.cwru.edu
 
-# Copyright (C) 1996-2002 Free Software Foundation, Inc.
+# Copyright (C) 1996-2007 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -114 +114 @@
         SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)'
         ;;
 
-freebsd2* | netbsd*)
+freebsd2*)
         SHOBJ_CFLAGS=-fpic
         SHOBJ_LD=ld
         SHOBJ_LDFLAGS='-x -Bshareable'
@@ -125 +125 @@
 
 # FreeBSD-3.x ELF
 freebsd[3-9]*|freebsdelf[3-9]*|freebsdaout[3-9]*|dragonfly*)
-        SHOBJ_CFLAGS=-fpic
+        SHOBJ_CFLAGS=-fPIC
         SHOBJ_LD='${CC}'
 
         if [ -x /usr/bin/objformat ] && [ "`/usr/bin/objformat`" = "elf" ]; then
@@ -142 +142 @@
         ;;
 
 # Darwin/MacOS X
-darwin8*)
+darwin[89]*)
         SHOBJ_STATUS=supported
         SHLIB_STATUS=supported
         
@@ -153 +153 @@
         SHLIB_LIBVERSION='$(SHLIB_MAJOR)$(SHLIB_MINOR).$(SHLIB_LIBSUFF)'
         SHLIB_LIBSUFF='dylib'
 
-        SHOBJ_LDFLAGS='-undefined dynamic_lookup'
+        SHOBJ_LDFLAGS='-dynamiclib -dynamic -undefined dynamic_lookup -arch_only `/usr/bin/arch`'
         SHLIB_XLDFLAGS='-dynamiclib -arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
 
         SHLIB_LIBS='-lncurses'  # see if -lcurses works on MacOS X 10.1 
@@ -171 +171 @@
         SHLIB_LIBSUFF='dylib'
 
         case "${host_os}" in
-        darwin[78]*)    SHOBJ_LDFLAGS=''
+        darwin[789]*)   SHOBJ_LDFLAGS=''
                         SHLIB_XLDFLAGS='-dynamiclib -arch_only `/usr/bin/arch` -install_name $(libdir)/$@ -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR) -v'
                         ;;
         *)              SHOBJ_LDFLAGS='-dynamic'
@@ -182 +182 @@
         SHLIB_LIBS='-lncurses'  # see if -lcurses works on MacOS X 10.1 
         ;;
 
-openbsd*)
+openbsd*|netbsd*)
         SHOBJ_CFLAGS=-fPIC
         SHOBJ_LD='${CC}'
         SHOBJ_LDFLAGS='-shared'
@@ -247 +247 @@
         SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
         ;;
 
-aix4.[2-9]*-*gcc*)              # lightly tested by jik@cisco.com
+aix4.[2-9]*-*gcc*|aix[5-9].*-*gcc*)             # lightly tested by jik@cisco.com
         SHOBJ_CFLAGS=-fpic
         SHOBJ_LD='ld'
         SHOBJ_LDFLAGS='-bdynamic -bnoentry -bexpall'
@@ -258 +258 @@
         SHLIB_LIBVERSION='$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)'
         ;;
 
-aix4.[2-9]*)
+aix4.[2-9]*|aix[5-9].*)
         SHOBJ_CFLAGS=-K
         SHOBJ_LD='ld'
         SHOBJ_LDFLAGS='-bdynamic -bnoentry -bexpall'
@@ -329 +329 @@
         SHOBJ_LD='${CC}'
         # if you have problems linking here, moving the `-Wl,+h,$@' from
         # SHLIB_XLDFLAGS to SHOBJ_LDFLAGS has been reported to work
-        SHOBJ_LDFLAGS='-shared -Wl,-b -Wl,+s'
+        SHOBJ_LDFLAGS='-shared -fpic -Wl,-b -Wl,+s'
 
         SHLIB_XLDFLAGS='-Wl,+h,$@ -Wl,+b,$(libdir)'
         SHLIB_LIBSUFF='sl'

readline-5.2

@@ -857 +857 @@
   c = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
 
+  if (c < 0)
+    return -1;
+
 #if defined (HANDLE_SIGNALS)
   if (RL_ISSTATE (RL_STATE_CALLBACK) == 0)
     _rl_restore_tty_signals ();
@@ -1520 +1523 @@
 
   mb_len = _rl_read_mbchar (mbchar, MB_LEN_MAX);
 
+  if (mb_len <= 0)
+    return -1;
+
   if (count < 0)
     return (_rl_char_search_internal (-count, bdir, mbchar, mb_len));
   else
@@ -1536 +1542 @@
   c = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
 
+  if (c < 0)
+    return -1;
+
   if (count < 0)
     return (_rl_char_search_internal (-count, bdir, c));
   else

readline-5.2

@@ -886 +886 @@
   RL_SETSTATE(RL_STATE_MOREINPUT);
   c = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
+
+  if (c < 0)
+    {
+      *nextkey = 0;
+      return -1;
+    }
+
   *nextkey = c;
 
   if (!member (c, vi_motion))
@@ -902 +909 @@
           RL_SETSTATE(RL_STATE_MOREINPUT);
           c = rl_read_key ();   /* real command */
           RL_UNSETSTATE(RL_STATE_MOREINPUT);
+          if (c < 0)
+            {
+              *nextkey = 0;
+              return -1;
+            }
           *nextkey = c;
         }
       else if (key == c && (key == 'd' || key == 'y' || key == 'c'))
@@ -1224 +1236 @@
 _rl_vi_callback_char_search (data)
      _rl_callback_generic_arg *data;
 {
+  int c;
 #if defined (HANDLE_MULTIBYTE)
-  _rl_vi_last_search_mblen = _rl_read_mbchar (_rl_vi_last_search_mbchar, MB_LEN_MAX);
+  c = _rl_vi_last_search_mblen = _rl_read_mbchar (_rl_vi_last_search_mbchar, MB_LEN_MAX);
 #else
   RL_SETSTATE(RL_STATE_MOREINPUT);
-  _rl_vi_last_search_char = rl_read_key ();
+  c = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
 #endif
 
+  if (c <= 0)
+    return -1;
+
+#if !defined (HANDLE_MULTIBYTE)
+  _rl_vi_last_search_char = c;
+#endif
+
   _rl_callback_func = 0;
   _rl_want_redisplay = 1;
 
@@ -1247 +1267 @@
 rl_vi_char_search (count, key)
      int count, key;
 {
+  int c;
 #if defined (HANDLE_MULTIBYTE)
   static char *target;
   static int tlen;
@@ -1293 +1314 @@
       else
         {
 #if defined (HANDLE_MULTIBYTE)
-          _rl_vi_last_search_mblen = _rl_read_mbchar (_rl_vi_last_search_mbchar, MB_LEN_MAX);
+          c = _rl_read_mbchar (_rl_vi_last_search_mbchar, MB_LEN_MAX);
+          if (c <= 0)
+            return -1;
+          _rl_vi_last_search_mblen = c;
 #else
           RL_SETSTATE(RL_STATE_MOREINPUT);
-          _rl_vi_last_search_char = rl_read_key ();
+          c = rl_read_key ();
           RL_UNSETSTATE(RL_STATE_MOREINPUT);
+          if (c < 0)
+            return -1;
+          _rl_vi_last_search_char = c;
 #endif
         }
     }
@@ -1467 +1494 @@
   c = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
 
+  if (c < 0)
+    return -1;
+
 #if defined (HANDLE_MULTIBYTE)
   if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
     c = _rl_read_mbstring (c, mb, mlen);
@@ -1485 +1515 @@
 
   _rl_vi_last_replacement = c = _rl_vi_callback_getchar (mb, MB_LEN_MAX);
 
+  if (c < 0)
+    return -1;
+
   _rl_callback_func = 0;
   _rl_want_redisplay = 1;
 
@@ -1516 +1549 @@
   else
     _rl_vi_last_replacement = c = _rl_vi_callback_getchar (mb, MB_LEN_MAX);
 
+  if (c < 0)
+    return -1;
+
   return (_rl_vi_change_char (count, c, mb));
 }
 
@@ -1650 +1686 @@
   ch = rl_read_key ();
   RL_UNSETSTATE(RL_STATE_MOREINPUT);
 
-  if (ch < 'a' || ch > 'z')
+  if (ch < 0 || ch < 'a' || ch > 'z')   /* make test against 0 explicit */
     {
       rl_ding ();
       return -1;
@@ -1702 +1738 @@
       rl_point = rl_mark;
       return 0;
     }
-  else if (ch < 'a' || ch > 'z')
+  else if (ch < 0 || ch < 'a' || ch > 'z')      /* make test against 0 explicit */
     {
       rl_ding ();
       return -1;