PurityAnalysis should treat methods that create implicit exceptions as impure

[errt]

Methods that create implicit exceptions (i.e. DivisionByZero) are not pure, as the Throwable constructor calls native method fillInStackTrace and that method is obviously not pure.

[Michael Eichberg]

Removing version: 0.8.16 (automated comment)

[Michael Eichberg]

fix issue #114

Signed-off-by: Michael Eichberg [e-mail]

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