<URL: http://bugs.freeciv.org/Ticket/Display.html?id=39459 >
On 19/09/2007, Elmo Todurov wrote:
> We held some correspondence with Stefan about the crash. Here's what he says:
> ---------- Forwarded message ----------
> On Wed, Sep 12, 2007 at 05:12:59PM +0200, Stefan Dirsch wrote:
> > On Wed, Sep 12, 2007 at 06:01:59PM +0300, Elmo Todurov wrote:
> > > > > Whose fault it is, GCC, glib2/gtk2 or FreeCiv? And, most
> > > > > importantly, how to fix it?
> > > >
> > > > Honestly. I have no idea. I'm afraid we need a gcc expert here to
> > > > compare the assembler output of "-O1" and "-O2". :-(
> [snip: Stefan asks someone]
> According to our gcc expert this is a undefinedness of signed overflow
> in freeciv, since "-O2 --fno-tree-vrp" fixes it as well.
> [he means here that compiling ONLY the wldlg.c with --fno-tree-vrp fixes it]
I debugged problem down to GINT_TO_POINTER()
At the time I believed this to be debian specific problem, so it's
reported to debian bug tracker.
That bugreport contains example program.
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