The Java agent logs to stdout, and should log to stderr.

[cgordon]

The code here:

https://github.com/puniverse/quasar/blob/master/quasar-core/src/main/java/co/paralleluniverse/fibers/instrument/JavaAgent.java#L140

logs to stdout, which is generally poor form, as stdout is used for program output and log lines can interfere with the parsing of that output by other programs. This logging should be moved to stderr.