Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!orc!bu.edu!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!mcsun!i2unix!ubdm!renzo
From: renzo@dm.unibo.it
Newsgroups: comp.windows.open-look
Subject: Xview bug (function pw_line)
Keywords: bug, pw_line, pixwin
Message-ID: <1990Nov30.140005.11542@dm.unibo.it>
Date: 30 Nov 90 14:00:05 GMT
Sender: renzo@dm.unibo.it (Renzo Davoli)
Reply-To: renzo@dm.unibo.it
Organization: Department of Mathematics, University of Bologna, Italy
Lines: 59

======================Send reports to xviewbugs@sun.com=====================

===============================Begin bug report===============================
Category:          xview
Subcategory:       library
Bug/Rfe:           bug 
Synopsis:          random "Segmentation Fault" (pw_line frees memory it never allocated) 
Severity:          2
Priority:	      asap
Description:
	Random "Segmentation fault" after line drawing.
	pw_line allocates memory for the structure dash_set only
	if the parameter tex (of type Pr_textur)
	is not NULL. After the drawing action there is no
	control before the freeing of dash_set.
Work around:
	Never call Pr_textur with the tex parameter equal to NULL.
Suggested fix:
	here is the simple patch:
62c62,66
<     (void) free((char *) dash_set);
---
>     /* R.Davoli bug fixed on june 24, 1990 */
>     if (tex)
>     /* end of fix */
>       (void) free((char *) dash_set);
Comments:
	This source chunk comes from the MIT X11-R4 contrib
	distribution.
	The bug seems to be contained in the libxview shipped with the
	Openwin 2.0 package. (I do not have source for it)
	The bug breaks sun3s more frequently than sun4s.

Called in by:
    Customer:
	Company:       University of Bologna
	Employee:      Renzo Davoli
	Contact:       renzo@dm.unibo.it
	Phone #:       +39 51 354480
	Release #:     X Window System V11 R4,
		       Openwin 2.0
	Hardware:      Sun3/50 Sun3/280 Sun4/60
	O/S:           SunOS 
	O/S version:   SunOS 4.0.3
	Server:        OpenWindows & MIT
	Server version:R4
	WindowMmgr:    OLWM TWM
============================End of bug report==================================

-----
Renzo Davoli
Department of Computer Science - University of Bologna
Piazza di Porta S. Donato, 5				Tel. +39 51 354480
40127 Bologna  ITALY					Fax. +39 51 354490
-- 
Renzo Davoli
Department of Computer Science - University of Bologna
Piazza di Porta S. Donato, 5				Tel. +39 51 354480
40127 Bologna  ITALY					Fax. +39 51 354490