JITTester's TempDir prints debug information about creation and deletion of a temporary folder, like this:

DBG: Temp folder created: '/tmp/java_tests8412639693749199985'
DBG: Temp folder deleted: '/tmp/java_tests8412639693749199985'

jittester is a library, TempDir can be used in other tools. Debug outputs mess up logs, confuse output comparison tools, etc. And do not give any valuable information (as temp folder with its contents is deleted after VM shutdown).

I suggest to remove those debug outputs.