Should I report this bug to Icedtea or directly to OpenJDK

[Robert Marcano]

Greetings. Where is the best place to report OpenJDK Java 8 bugs for 
font related problems (printing)?. I ask because IIRC Icedtea provided 
the implementation for OpenJDK text layout but it looks like recent 
Icedtea doesn't provides those patches, Are those parts of Icedtea 
already upstreamed for OpenJDK 8?

Bug doens't happen on Oracle JVMs, when printing font metrics under some 
conditions return negative or zero ascents. I have a test case but I 
want to know where is the best bug database to report it.