Concurrentmodificationexception in debugging console after crash about polargraphcontroller HOT 6 CLOSED

Generate commands from where? Can you help me replicate the issue?

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Step by step. I load the program from Processing, because the Java exe file didnt want to run. https://gyazo.com/a0b5918ab966d6b975e6709984751a34 (Console on startup if this helps any)
Start the Queue
Set Home
Load Image File
Load
Select Area, Show Density Range off
Mask the white area.
Render Pixels (Top Left, Var Freq Square Wave, Lift Pen over Masked.)
Generate Commands
Crash
The queue that would be sent goes from row: 24948.0 to 35262.0, skipping 18 numbers each time, the queue ending with Dir:SW and CME in orange at the top bar of the queue.
The Properties file if it'll help:
default.properties.txt

If there is anything else you may need, please ask for it!

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Have you gotten any idea or progress? It’s been a month.

from polargraphcontroller.

Hello, this is a fun one! I have two bad ways to solve it.

1. Turn "show queue preview" off (the small toggle buttons) at the end of the buttons on the input tab.
2. Wrap the call to queuePreview in a try/catch:

(line 843 onwards:

  ...
  showGroupBox();
  showCurrentMachinePosition();

  try {
    if (displayingQueuePreview)
      previewQueue();
  }
  catch (ConcurrentModificationException cme)
  {
    // not doing anything with this exception - I don't mind if it's wrong on the screen for a second or two.
    println("Caught CME coming from previewQueue(): " + cme.getMessage());
  }

  if (displayingInfoTextOnInputPage)
    showText(250,45);
  drawStatusText((int)statusTextPosition.x, (int)statusTextPosition.y);
  ...

I'm not sure what the problem actually is. I did replicate the issue and got the exception you described. There's nothing on that line (1624) that should be able to throw a concurrent modification exception!

I haven't dug into it. It looks to me that the list of pixels being extracted takes so long to be processed that some other process has time to interfere.

It's a very long list, and is quite unusual.

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I've pushed a try/catch, not the best way to do it, but it seems to work! See if it works for you.

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Kinda dissappointed but relieved that turning off the queue preview works. Such a simple thing. Thanks a lot though! Now I can finally doodle.

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