[....]

 [java] Test(compile, run): test\script\external\test262\test\suite\ch07\7.4\S7.4_A6.js
     [java] Java Result: -1073740940

test262parallel:

BUILD SUCCESSFUL
Total time: 1 minute 13 seconds


I initially suspected anonymous class usage -- it did appear that switching off anon-class loading seemed to improve better runs. But I reproduced test262parallel w/without anon. class loading.