Cause a CVM exception! (200 Gold)

[mikera]

Under normal circumstances, the CVM should never throw an exception when executing CVM code.

• Must be caused by invoking valid CVM code in a valid Context (e.g. via Context.execute(op))
• Must result in a Java exception that is not otherwise caught by the CVM (e.g. NullPointerException)
• May be triggered by executing multiple transactions, providing such transactions are possible for an account to execute in a single block
• Exceptions caused by JVM limits (OutOfMemoryError, StackOverflowError etc.) do not count unless they can be reliably replicated even with arbitrarily large JVM allowances.
• Must implement a fix that prevents the issue along with JUnit regression tests

This bounty may be claimed multiple times, providing that the exception has a different cause