Date: Mon, 30 Aug 1999 01:20:02 -0700 (PDT) From: Sheldon Hearn <sheldonh@uunet.co.za> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/13463: /bin/sh: malloc() recursive call: segv Message-ID: <199908300820.BAA82232@freefall.freebsd.org>
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The following reply was made to PR bin/13463; it has been noted by GNATS.
From: Sheldon Hearn <sheldonh@uunet.co.za>
To: hoek@FreeBSD.ORG
Cc: FreeBSD-gnats-submit@FreeBSD.ORG
Subject: Re: bin/13463: /bin/sh: malloc() recursive call: segv
Date: Mon, 30 Aug 1999 10:06:32 +0200
On Sun, 29 Aug 1999 21:00:58 MST, Tim Vanderhoek wrote:
> $ while :; do echo -n ; done
> sh in malloc(): warning: recursive call.
> sh in malloc(): warning: recursive call.
> Segmentation fault (core dumped)
This looks weird.
Program terminated with signal 11, Segmentation fault.
#0 0x805d644 in yywrap ()
(gdb) back
#0 0x805d644 in yywrap ()
#1 0x805d681 in yywrap ()
#2 0x805db05 in history ()
#3 0x8051e3d in preadbuffer () at /usr/src/bin/sh/input.c:296
#4 0x8058765 in xxreadtoken () at /usr/src/bin/sh/parser.c:776
#5 0x80585b7 in readtoken () at /usr/src/bin/sh/parser.c:693
#6 0x805762d in parsecmd (interact=1) at /usr/src/bin/sh/parser.c:145
#7 0x80545b5 in cmdloop (top=1) at /usr/src/bin/sh/main.c:240
#8 0x805452f in main (argc=1, argv=0xbfbfd668) at
/usr/src/bin/sh/main.c:203
How on earth does yywrap recurse on itself like that?
/usr/src/usr.bin/lex/lib/libyywrap.c:
int yywrap()
{
return 1;
}
By the way, I can't reproduce the problem if I compile with -DDEBUG=2.
Ciao,
Sheldon.
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