[scala] CPD terminates with an exception when a small value is set for --minimum-tokens

Affects PMD Version:
6.18.0, 6.20.0

Rule:

Description:
When targeting a scala file, if a small value is set for --minimum-tokens, CPD will exit with an exception.

Code Sample demonstrating the issue:

object Foo {
    void foo() {
        String[] array = null;
        array = {"abc", "def", "ghi"};
    }
}

I prepared another same file.

Running PMD through: [CLI]

pmd-bin-6.18.0/bin/run.sh cpd --minimum-tokens 20 --language scala --files scala/

Start by reproducing the issue with the provided run.sh cpd command, --minimum-tokens 20, --language scala, and the scala/ files. Inspect the CPD Scala processing path after reproducing the exception. Done means the same input completes without an exception when a small minimum-token value is used.