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Change of .error-frame for this pattern:

xxx.fs:312: Undefined word
    blabla bla blablabla
    ^^^^^^
Error: Undefined word

    1: \ ERRORE.FS English error strings                      9may93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation; either version 2
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program; if not, write to the Free Software
   19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20: 
   21: 
   22: \ The errors are defined by a linked list, for easy adding
   23: \ and deleting. Speed is not neccassary at this point.
   24: 
   25: AVariable ErrLink              \ Linked list entry point
   26: NIL ErrLink !
   27: 
   28: decimal
   29: 
   30: \ error numbers between -256 and -511 represent signals
   31: \ signals are handled with strsignal
   32: \ but some signals produce throw-codes > -256, e.g., -28
   33: 
   34: \ error numbers between -512 and -2047 are for OS errors and are
   35: \ handled with strerror
   36: 
   37: has? OS [IF]
   38: : >stderr ( -- )
   39:     r> outfile-id >r stderr to outfile-id
   40:     >exec  r> to outfile-id ;
   41: [ELSE]
   42: : >stderr ;
   43: [THEN]
   44: 
   45: : .error ( n -- )
   46:     >stderr
   47:     ErrLink
   48:     BEGIN @ dup
   49:     WHILE
   50: 	2dup cell+ @ =
   51: 	IF
   52: 	    2 cells + count type drop EXIT THEN
   53:     REPEAT
   54:     drop
   55: [ has? os [IF] ]
   56:     dup -511 -255 within
   57:     IF
   58: 	256 + negate strsignal type EXIT
   59:     THEN
   60:     dup -2047 -511 within
   61:     IF
   62: 	512 + negate strerror type EXIT
   63:     THEN
   64: [ [THEN] ]
   65:     . ;