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Dear Tim,

Thank you for your help. But I am using the version magic-7.1.5.tgz.

Thanks to your fast response, I go back and check my other linux machine
with magic I've compiled half a year ago, and scalegrid command looks good.

Today, I compile magic-7.1.5.tgz this other linux machine, the compiler
output looks much prettier, and no warnings. But then when I test the
command again, the program still crashes and core dumped.

Since I don't know how to use gdb, I try my best to get the following,

> [chuang@TESTING_FS bin]$ gdb magic
> GNU gdb 5.0
> Copyright 2000 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are
> welcome to change it and/or 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.
> This GDB was configured as "i386-redhat-linux"...
> (gdb) run
> Starting program: /home/chuang/magic-7.1.5/bin/magic
>
> Magic 7.1 - Compiled on ¶ç¤Ç 6¤ë 18 09:36:49 CST 2002.
> CAD_HOME sets "~cad" to "/home/chuang/magic-7.1.5/".
>
> Using technology "scmos", version 8.2.8.
> MOSIS Scalable CMOS Technology for Standard Rules
> Using TrueColor, VisualID 0x22 depth 24
> Loading modules:
> [help] [box] [drc] [label] [draw] [stack] [prs] [gate] [sel]
> Use scm-help ? for help on some scheme functions
> :scalegrid 1 4
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x808b2c4 in DBSrPaintArea (hintTile=0x0, plane=0x9ba8d08,
> rect=0x81945b8, mask=0x85abec0,
> func=0x8073b60 <dbTileScaleFunc>, arg=0xbfffecb0 "\004") at DBtiles.c:108
> 108 GOTOPOINT(tp, &start);
> (gdb)
>
If the above information is not enough, I am willing to provide other
information to you only that you'll have to tell me what to do.

Regards,
Tim Chuang




R. Timothy Edwards wrote:

>Dear Tim,
>
>  
>
>>Magic crashes right after I type the following commands,
>>
>>magic
>>
>>:scalegrid 1 4
>>
>>Segmentation fault
>>
>>    
>>
>
>   The "scalegrid" command was largely untested, even through versions which
>are still posted as "current" on the Cornell website.  However, I wouldn't
>have expected it to crash immediately.  The cure I can offer is to compile
>my version with better developed scaling routines.  This version can be
>obtained from:
>	http://bach.ece.jhu.edu/~tim/programs/magic/archive/magic-7.1.5.tgz
>
>The new version allows "scalegrid" to be used at any time, including during
>layout, and makes a clear distinction between microns, lambda, and internal
>units.  The edit box is generally aligned to lambda units, but with a finer
>grid, it is possible to position the box to the finer grid either with
>commands such as "move e .25" or by doing "snap internal", which makes the
>finer internal grid default.  "snap lambda" returns to the original
>alignment.
>
>   It would still be helpful to get the output from running magic (your
>current version) under "gdb" or other debugger to find the line which
>caused the segmentation fault, in case the error is not related to the
>changes made in the newer version (this is unlikely, as the "scalegrid"
>routines were completely overhauled).
>
>					Regards,
>					Tim
>
>
>
>
>  
>

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