Try compiling:

public class SimplePaint {
    public void setupColorChooser() {
int x[] = {1, 2, 3};
    }
}

java.tools.java.InternalError inline
        at java.lang.Exception.<init>(Exception.java)
        at java.tools.java.InternalError.<init>(InternalError.java)
        at java.tools.tree.ArrayExpression.inline(ArrayExpression.java)
        at java.tools.tree.ExpressionStatement.inline(ExpressionStatement.java)
        at java.tools.tree.VarDeclarationStatement.inline(VarDeclarationStatement.java)
        at java.tools.tree.CompoundStatement.inline(CompoundStatement.java)
        at java.tools.tree.DeclarationStatement.inline(DeclarationStatement.java)
        at java.tools.tree.CompoundStatement.inline(CompoundStatement.java)
        at java.tools.javac.SourceField.inline(SourceField.java)
        at java.tools.javac.SourceField.code(SourceField.java)
SimplePaint.java:0: class SimplePaint:void setupColorChooser()@java.tools.java.InternalError: inline