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Date: Fri, 12 Mar 1999 12:24:39 +0200 (EET)
From: Ruslan Ermilov <ru@ucb.crimea.ua>
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To: FreeBSD-gnats-submit@freebsd.org
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Subject: gnu/10555: [PATCH] awk dumps core
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>Number:         10555
>Category:       gnu
>Synopsis:       [PATCH] awk dumps core
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Fri Mar 12 02:30:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Ruslan Ermilov
>Release:        FreeBSD 3.1-STABLE i386
>Organization:
United Commercial Bank
>Environment:

3.1-STABLE
GNU Awk 3.0.3

>Description:

awk dumps core (signal 11)

>How-To-Repeat:

# awk '{ print $1,,$2 }'
awk: cmd. line:1: { print $1,,$2 }
awk: cmd. line:1:            ^ parse error
awk: cmd. line:1: fatal error: internal error
Abort trap - core dumped


GDB is free software and you are welcome to distribute copies of it
 under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.16 (i386-unknown-freebsd), 
Copyright 1996 Free Software Foundation, Inc...
Core was generated by `awk'.
Program terminated with signal 6, Abort trap.
Reading symbols from /usr/lib/libgnuregex.so.2...done.
Reading symbols from /usr/lib/libm.so.2...done.
Reading symbols from /usr/lib/libc.so.3...done.
Reading symbols from /usr/libexec/ld-elf.so.1...done.
#0  0x280d1c44 in _kill ()
(gdb) bt
#0  0x280d1c44 in _kill ()
#1  0x28105cf4 in abort ()
#2  0x8058432 in catchsig (sig=11, code=12)
    at /usr/src/gnu/usr.bin/awk/../../../contrib/awk/main.c:708
#3  <signal handler called>
#4  0x804d934 in append_right (list=0x0, new=0x806c990) at awktab.y:2114
#5  0x804ae98 in yyparse () at awktab.y:630
#6  0x8057cad in main (argc=2, argv=0xefbfdbe4)
    at /usr/src/gnu/usr.bin/awk/../../../contrib/awk/main.c:373
#7  0x8049635 in _start ()


>Fix:

The following patch is for src/contrib/awk/awk.y:

Index: awk.y
===================================================================
RCS file: /usr/FreeBSD-CVS/src/contrib/awk/awk.y,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 awk.y
--- awk.y	1997/10/14 18:16:58	1.1.1.1
+++ awk.y	1999/03/12 10:06:47
@@ -2111,7 +2111,9 @@
 
 	oldlist = list;
 	if (savefront == oldlist) {
-		savetail = savetail->rnode = new;
+		savetail = new;
+		if (savetail)
+			savetail->rnode = new;
 		return oldlist;
 	} else
 		savefront = oldlist;


>Release-Note:
>Audit-Trail:
>Unformatted:


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