Re: [ruby-gnome2-devel-en] [ANN] Ruby-GNOME2 3.0.4

[Stefan S. <ma...@ss...>]

On Thu, 2015-09-24 at 00:59 +0200, Stefan Salewski wrote:
> [BUG] rb_gc_mark(): 0x000000032b6490 is T_NONE
> 
> That is what I get again and again. Impossible to locate the error,
> when I comment out some code, that error will arise at other places.
> 
> GC.disable at the beginning of the code makes it working fine.

I tried to do the git install of 3.06 with compiler option -O0 to
ensure that compiler optimizations are not a reason for the bug. For
that I had to build my Ruby with -O0 first, because rake seems to take
cflags from Ruby install. With that I got a state where each startup of
my app crashed with above gc error. That made debugging really easy, so
I found out that this code piece in file pet_conf_ed.rb

column.set_cell_data_func(renderer) do |tvc, cell, model, iter|
cell.pixbuf.fill!((iter[Col_R] * 255).round * 16777216 + (iter[Col_G] * 255).round * 65536 + (iter[Col_B] * 255).round * 256 + (iter[Col_A] * 255).round)
end

is very important for the bugs. With cell.pixbuf.fill commented out, I got one bug in 10 minutes of testing, but with that line active
I get a crash for each startup.

No idea why currently. The pixbuf.fill should cause no harm, maybe set_cell_data_func is wrong?

I also tried to recompile Ruby gc.c with debugging options enabled before, but the output did not gave me helpful info.