private void recheckThrows(AbstractKernelBlock block) {
        if (block instanceof KernelProgramBlock) {
            ThrowExceptionContainer blockExceptions = ((KernelProgramBlock) block).getThrowExceptions();
            if (blockExceptions != null) {
                for (IClass exp : blockExceptions) {
                    exceptions.add(exp);
                }
            }
        }

        for (Executable exe : block.getQueue()) {
            if (exe instanceof AbstractKernelBlock) {
                recheckThrows((AbstractKernelBlock) exe);
            }
        }
    }