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.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=440545
That bugreport contains example program.
- ML
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