I just want to say that I've also seen cases where the editor crashes in cases, where the actual kernel code compiled and ran successfully.
One case where this happens was a change in the for loop condition, I had replaced a "row < some_counter" by "row < 2" (or another scalar value).
I compiled pixels.cl on KA2 ver 2.1.855 with catalyst 13.8 and didn't get any crash.
Can you please give more details such as target ASIC, special compilation keys you are using etc.
For me, no compilation arguments (I assume that's what you mean by keys).
As stated it compiles and runs okay in my app (Like Kraymer says, most of the time a crash in KA2 for me means it compiled okay, I have many many more examples where the code compiles fine, but crashes KA2)
Target is... all of them.
I'm using a Radeon 5670. KA2 version is 2.1.880
Let me know if I can be any more help