eclipse-play complain about missing routes for (404)

[zhaopuming]

--- routes ---

GET /favicon.ico 404

Error Message:

Description Resource Path Location Type
Missing route: 404 routes /demo/conf line 10 Problem

[branaway]

The favicon can be ignored at dev time. I usually leave it to the front server to handle it, such as NGINX.

Does it have anything to do with Eclipse?

[zhaopuming]

The problem seems that eclipse-play does not recognize '404' as a correct route, and that's only after I installed japid plugin (the play plugin feels fine about 404), I found that 404 was recently added in 1.2.x, maybe it's a plugin version mismatch?
Also, route file in modules dir (play module's example I guess) also contains errors. with routes the plugin doesn't recognize.