Re: art backend : NSView crashes

[Riccardo Mottola]

Hi,

Fred Kiefer wrote:
> Where does this new crash come from? Does it give you a better stack trace?

I tried hard, I cannot reoproduce this on on another computer. On the 
problematic computer (Gentoo linux, x86/32, libart 2.3.21 gcc 4.9.2)

- no optimizations (-g -O0) to compile PRICE -> no crash
- -g -O1 or -O2, I get a useless trace:

Program received signal SIGSEGV, Segmentation fault.
0xbfffcb89 in ?? ()
(gdb) bt
#0  0xbfffcb89 in ?? ()
#1  0x00000000 in ?? ()

I think it is totally unrelated to GUI and BACK.
PRICE's PRWindowController gets a notification and has this line:

  imgSize = [[[self document] activeImage] pixelSize];

this causes the crash. Supposing activeImage is nil, what pixelSize will 
I get?
Accessing a method on a nil object? and if that method doesn't return an 
object but a struct?

I know that on SPARC accessing members of a NULL struct causes problems, 
but the above?


I substituted the code with this:

  img = [[self document] activeImage];
  imgSize = NSZeroSize;
  if (img)
    imgSize = [img pixelSize];

and it works fine. What do you think?

Riccardo