[GRASS-dev] [bug #4768] (grass) nviz segfault on startup when creating display window

[Glynn Clements]

Request Tracker wrote:

> this bug's URL: http://intevation.de/rt/webrt?serial_num=4768
> -------------------------------------------------------------------------
> 
> Subject: nviz segfault on startup when creating display window
> 
> Platform: Mac OSX
> grass obtained from: Trento Italy site
> grass binary for platform: Compiled from Sources
> GRASS Version: CVS 2006_06_24
> 
> Even with a simple quickstart: nviz -q, nviz is crashing with a segfault when it tries to create the 
> output window.  From the OSX crashlog:
> 
> Exception:  EXC_BAD_ACCESS (0x0001)
> Codes:      KERN_INVALID_ADDRESS (0x0001) at 0x5c637273
> 
> Thread 0 Crashed:
> 0   libX11.6.dylib                 	0x9bd35fa1 XQueryExtension + 24
> 1   libGL.1.dylib                  	0x9be2edab glXQueryExtension + 62
> 2   nviz                           	0x000115eb Togl_CreateWindow + 56
> 3   com.tcltk.tklibrary            	0x9ad191ad Tk_MakeWindowExist + 120
> 4   nviz                           	0x000126a3 Togl_Cmd + 1046
> 5   com.tcltk.tcllibrary           	0x9ac181a3 TclInvokeStringCommand + 121
> 6   com.tcltk.tcllibrary           	0x9ac1a915 TclEvalObjvInternal + 733
> 7   com.tcltk.tcllibrary           	0x9ac3d666 TclExecuteByteCode + 3101
> 8   com.tcltk.tcllibrary           	0x9ac4244e TclCompEvalObj + 279
> 9   com.tcltk.tcllibrary           	0x9ac6926d TclObjInterpProc + 524
> 10  com.tcltk.tcllibrary           	0x9ac1a915 TclEvalObjvInternal + 733
> 11  com.tcltk.tcllibrary           	0x9ac1ac1c Tcl_EvalEx + 488
> 12  com.tcltk.tcllibrary           	0x9ac5893a Tcl_FSEvalFile + 400
> 13  com.tcltk.tcllibrary           	0x9ac1a915 TclEvalObjvInternal + 733
> 14  com.tcltk.tcllibrary           	0x9ac1ac1c Tcl_EvalEx + 488
> 15  com.tcltk.tcllibrary           	0x9ac1b03a Tcl_Eval + 42
> 16  nviz                           	0x0000cac0 Ninit + 199
> 17  nviz                           	0x00002614 NVIZ_AppInit + 210
> 18  com.tcltk.tklibrary            	0x9acef2eb Tk_MainEx + 761
> 19  nviz                           	0x000111ca main + 97
> 20  nviz                           	0x000024ea _start + 228 (crt.c:272)
> 21  nviz                           	0x00002405 start + 41
> 
> If I add an elevation raster from spearfish6 demo, it shows some status, then crashes with the same 
> thread trace when trying to create the window.

This is a bug in the system's OpenGL implementation; there isn't
anything we can do about it.

-- 
Glynn Clements <glynn at gclements.plus.com>