Seems to happen after:
  http://hg.openjdk.java.net/code-tools/jtreg/rev/92c443fc7b55

$ rm -rf build; bash ./make/build-all.sh ~/Install/jdk8u232/
...
../src/share/classes/com/sun/javatest/regtest/config/RegressionEnvironment.java:36: error: no suitable constructor found for TestEnvironment(String,ArrayList<Map<String,String>>,String[])
        super("regtest", new ArrayList<Map<String, String>>(), new String[] { });
        ^
    constructor TestEnvironment.TestEnvironment(String,Map<String,String>,String) is not applicable
      (argument mismatch; ArrayList<Map<String,String>> cannot be converted to Map<String,String>)
    constructor TestEnvironment.TestEnvironment(String,Map[],String...) is not applicable
      (argument mismatch; ArrayList<Map<String,String>> cannot be converted to Map[])
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output