It seems that the -Xlog option does not work

[hengxin]

I am using the ANTLR 4 plugin (version 1.20; including ANTLR 4.11.1) for IntelliJ. In build.gradle in this project, I use the -Xlog option as follows:

generateGrammarSource {
    arguments += ["-Xlog", "-visitor"]
}

However, it does not generate .log file as expected.

Note: I have posted a problem on Stackoverflow (without getting answers yet).