SERIOUS GPC BUG!!_(re)

Sat, 14 Jun 1997 13:19:57 +0200 (MET DST)

According to Bernhard Tschirren:
> 
> Every time I compiled my programs with "-g" (debugging) the compiler crashed
> with a SIGSEGV. With a bit of late-night detective-ing, I think I figured
> WHY this happens!
> 
> I managed to get an assembly dump of my program without the compiler
> crashing. The "-g" option wrote ".def _(null) ... " to the assembly output.
> Somehow, some NULL strings have crept into GPC.... :-( Whats even scarier is
> that the number of _(null) defs varied between different compiles!

That's a good hint for what kind of errors to look out; however it's hopeless
to check all 2MB of GPC source code for NULL pointer dereferences ... ;-) and
my own test programs are compiled with `-g -O3 -Wall' all the time.  Could
you please mail me a short test program which triggers the bug?

Thanks in advance,

    Peter

 Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer
peter.gerwinski@uni-essen.de - http://home.pages.de/~peter.gerwinski/ [970201]
 maintainer GNU Pascal [970510] - http://home.pages.de/~gnu-pascal/ [970125]

Peter Gerwinski (peter@agnes.dida.physik.uni-essen.de)