Conditionally initialized `final` variables considered maybe uninitialized

Running the following in `groovyConsole`:

final int i
final boolean a = true
if (a) {
    i = 1
} else {
    throw new IllegalStateException('a is false')
}
println "i = $i"

would give me:

1 compilation error:
The variable [i] may be uninitialized
. At [9:15] at line: 9, column: 15

It seems groovyc does not take throwing an exception as a non-reachable branch.

This code is almost a verbatim copy from a java code that is working.

This looks similar to GROOVY-8472, and a few others.