This is not critical or high prio and I have no idea how the P5 UI works so maybe this is a swing problem that can't be fixed. But I didn't find anything about it in neither faq or forums, so thought I'd just mention it anyway.

I accidently flooded 0087 with print()s that froze the entire processing environment. That's not very strange, but here comes the fun part... When I look at my 5 MB (!) stdout.txt it looks like processing goes into eternal recoursive behaviour by, even after sketch output being stopped, flooding itself with javax.swing.text error messages that in turn generates more almost identical error messages and so on until the Java process tree is shut down from the task manager.

I don't have that sketch "intact" any more, but I can take try to repeat the effect. The stdout has been cleared since then but I found this snippet:

Code:

java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)javax.swing.text.StateInvariantError: infinite loop in formatting
	at javax.swing.text.FlowView$FlowStrategy.layout(Unknown Source)
	at javax.swing.text.FlowView.layout(Unknown Source)
	at javax.swing.text.BoxView.setSize(Unknown Source)
	at javax.swing.text.BoxView.modelToView(Unknown Source)
	at javax.swing.text.CompositeView.modelToView(Unknown Source)
	at javax.swing.text.BoxView.modelToView(Unknown Source)
	at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(Unknown Source)
	at javax.swing.plaf.basic.BasicTextUI.modelToView(Unknown Source)
	at javax.swing.text.DefaultCaret.repaintNewCaret(Unknown Source)
	at javax.swing.text.DefaultCaret$1.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
javax.swing.text.StateInvariantError: infinite loop in formatting
	at javax.swing.text.FlowView$FlowStrategy.layout(Unknown Source)
	at javax.swing.text.FlowView.layout(Unknown Source)
	at javax.swing.text.BoxView.setSize(Unknown Source)
	at javax.swing.text.BoxView.modelToView(Unknown Source)
	at javax.swing.text.CompositeView.modelToView(Unknown Source)
	at javax.swing.text.BoxView.modelToView(Unknown Source)
	at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(Unknown Source)
	at javax.swing.plaf.basic.BasicTextUI.modelToView(Unknown Source)
	at javax.swing.text.DefaultCaret.repaintNewCaret(Unknown Source)
	at javax.swing.text.DefaultCaret$1.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source) 

Which I think was pretty much what the stdout.txt was filled with. The program that triggered this self flooding was not uncontrollably recursive and neither was it an infinite loop. The print() was used to write out debug data in a search routine. Not in uncontrollable amounts, when I think of it, and the self flooding continued for quite a while after the intended output was finished, until I grew tired of waiting for it to finish and killed the process instead.

Ok, results after some testing. Spaces are not relevant. Line breaks are.

This works:
Code:

for(int i=0;i<1000;i++) print("baa boo ");
 

This causes flood of swing errors:
Code:

for(int i=0;i<10000;i++) print("baa boo ");
 

Then again, this does not:
Code:

for(int i=0;i<10000;i++) {
  print("baa boo ");
  if(i%1000==0) print("\n");
  }
 

And after some even more hard core testing, the limit of working print() output without line breaks seem to be at 32775 characters.

Code:

println();
for(int i=0;i<32775;i++) { print("b"); }
 

..works, but adding another number to the iteration makes the stdout.txt grow and P5 go good night.

fixed for 0091.