IntelliJ IDEA 9 and Scala 2.8

I have a problem with IntelliJ IDEA 9.0's debugger when I run scala code (scala 2.8). The problem is that I can't开发者_运维技巧 see which case is selected in the match sentence when I make traces step by step.

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Normally, the debugger ``jumps'' from one case branch to expression to be matched and back to the next branch subsequently. Do you observe another behaviour?

Ilya