If you evaluate the following two statements together
	
	 
10 
+ 
11 
+ 
12 
+ 
13 
+ 
14 
+ 
15 
+ 
16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39.
	[:a :b :c | self halt] value: 0 value: 0 value: 0.

you are dropped into an emergency evaluator (in a non-closure image  
anyway). Evaluating each statement individually is no problem.

If you have fun figuring out puzzling behavior or want to prove your  
Squeak Skillz you might try to investigate it. If you need hints,  
scroll down to (*).

For the rest, a fix and explanation is on Mantis:

http://bugs.squeak.org/view.php?id=7355

- Bert -










































































(*) These lines

	 
10 
+ 
11 
+ 
12 
+ 
13 
+ 
14 
+ 
15 
+ 
16 
+ 
17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40.
	[:a :b :c | ] decompile

let you debug the issue. Full explanation below (**)













































































































(**) The decompiler fails because the #blockCopy: argument is the 33rd  
literal and hence uses an extended byte code to push. This is not  
anticipated by the decompiler which assumes a single-byte instruction  
is used to push the argument. And if this explanation does not make  
sense to you ... you've got a lot to learn about the inner workings of  
Squeak ;)