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Article #383

illegal instruction on DECstation/5000 - mark_object bug?

#383
From: Fred Douglis
Date: Mon, 16 Nov 1992 19:33
38 lines
2155 bytes
In epoch 4.2, running on Ultrix V4.2, I have had epoch die on me
several times in less than a week.  (Epoch was just installed here;
prior to that I used vanilla gnu emacs.)

A backtrace from gdb claims that the core file doesn't match.  A
backtrace from dbx shows hundreds of frames of mark_object, as follows:

(dbx) where
>  0 abort.abort(0x45d68c, 0x29, 0x10133454, 0x1019ec54, 0x1452cb00) ["../exit.c":80, 0x4b341c]
   1 .block207 ["alloc.c":1170, 0x45d704]
   2 mark_object(objptr = 0x1052cb24) ["alloc.c":1170, 0x45d704]
   3 .block205 ["alloc.c":1087, 0x45d554]
   4 mark_object(objptr = 0x103d4888) ["alloc.c":1087, 0x45d554]
   5 .block205 ["alloc.c":1087, 0x45d554]
   6 mark_object(objptr = 0x103d4194) ["alloc.c":1087, 0x45d554]
   7 .block205 ["alloc.c":1087, 0x45d554]
   8 mark_object(objptr = 0x1013aa78) ["alloc.c":1087, 0x45d554]
   9 .block205 ["alloc.c":1087, 0x45d554]
  10 mark_object(objptr = 0x10150998) ["alloc.c":1087, 0x45d554]
  11 .block206 ["alloc.c":1113, 0x45d5d0]
  12 mark_object(objptr = 0x10139d90) ["alloc.c":1113, 0x45d5d0]
  13 .block205 ["alloc.c":1087, 0x45d554]
  14 mark_object(objptr = 0x1010e9e4) ["alloc.c":1087, 0x45d554]
  15 .block207 ["alloc.c":1140, 0x45d688]
  16 mark_object(objptr = 0x1010e0a8) ["alloc.c":1140, 0x45d688]
  17 .block207 ["alloc.c":1140, 0x45d688]
More (n if no)?
...


Any idea what might cause this?  Any patches available? Many thanks for
suggestions.

-- 
Fred Douglis
Matsushita Information Technology Laboratory  | Email: douglis@mitl.com
182 Nassau Street			      | Phone: +1 609 497-4600
Princeton, NJ 08542 USA 		      | Fax:   +1 609 497-4013
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Message-ID: <1992Nov16.193322.6348@MITL.COM>
Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!sun-barr!cs.utexas.edu!wupost!darwin.sura.net!jvnc.net!mitl.com!douglis

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Newsgroups: gnu.epoch.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!sun-barr!cs.utexas.edu!wupost!darwin.sura.net!jvnc.net!mitl.com!douglis
From: douglis@MITL.COM (Fred Douglis)
Subject: illegal instruction on DECstation/5000 - mark_object bug?
Message-ID: <1992Nov16.193322.6348@MITL.COM>
Keywords: core dump mark_object
Sender: news@MITL.COM
Nntp-Posting-Host: chimay.mitl.com
Organization: Matsushita Information Technology Laboratory
Date: Mon, 16 Nov 1992 19:33:22 GMT
Lines: 38