[fxruby-users] Big tables still segfault with fxruby-1.2.4

[Joel VanderWerf]

By putting some GC.start lines in David's original code, the problem 
comes up much faster. With just 10 rows, it happens in 2 clicks on 
button 1. Changes marked with " # <--- added".

$ ruby fxbug2.rb
fxbug2.rb:25: [BUG] rb_gc_mark(): unknown data type 0x30(0x82255f0) non 
object
ruby 1.8.2 (2004-12-25) [i686-linux]

zsh: abort      ruby fxbug2.rb


Another observation: moving the setTableSize call into initialize seems 
to avoid the problem. So it appears that as long as you never discard 
any items, it's ok. I may be able to use that in my own case...


------------------------
require "fox12"
include Fox

#GC.disable

class TestWindow < FXMainWindow

   TABLE_SIZE = 10 # <--- added

   def initialize(app)
     super(app, "MyTest", nil, nil, DECOR_ALL, 0, 0, 600, 400, 0, 0)
     mainFrame = FXVerticalFrame.new(self, LAYOUT_FILL_X|LAYOUT_FILL_Y)
     @table = FXTable.new(mainFrame, nil, 0, LAYOUT_FILL_X|LAYOUT_FILL_Y)
     goButton = FXButton.new(mainFrame, " Go method 1")
     goButton.connect(SEL_COMMAND) { fillTable }
     goButton2 = FXButton.new(mainFrame, " Go method 2")
     goButton2.connect(SEL_COMMAND) { fillTable2 }
   end

   # fails after 2 to 15-20 iterations
   def fillTable
     @table.setTableSize(TABLE_SIZE, 1)
     (0...TABLE_SIZE).each do |r|
       @table.setItemText(r, 0, "#{r}")
       GC.start # <--- added
     end
     @table.setFocus
     GC.start # <--- added
   end

   # seems to require more iterations, but still fails
   def fillTable2
     @table.setTableSize(0, 1)
     (0...TABLE_SIZE).each do |r|
       @table.insertRows(r)
       @table.setItemText(r, 0, "#{r}")
     end
     @table.setFocus
   end

   def create
     super
     show(PLACEMENT_SCREEN)
   end

end

def runme
   application = FXApp.new("MyTest", "FoxTest")
   TestWindow.new(application)
   application.create
   application.run
end

runme