Using filter condition causes writes to stderr

[robfromboulder]

I'm using a filter condition to limit matches based on confidence:

PhoneNumberFilterStrategy fs = new PhoneNumberFilterStrategy();
fs.setConditions("confidence > 0.7");

This functionality works properly, but each match at runtime results in an output line to stderr like this:

line 1:16 no viable alternative at input '<EOF>'

This occurs when running the Phileas unit tests as well, so it's not just my specific application.

The easy workaround for now is just to ignore stderr when launching applications:

java <...> 2>/dev/null

ps. In our applications, we don't rely on stderr for much so it's not a big deal. This issue would be more severe if stdout was getting overrun with these messages, or if the Phileas user is relying more on stderr than we are :-)