Maintainers for ecj are Debian Java Maintainers <pkg-java-maintainers@lists.alioth.debian.org>.
You may want to refer to the following packages that are part of the same source: libeclipse-jdt-annotation-java, libeclipse-jdt-apt-core-java, libeclipse-jdt-apt-pluggable-core-java, libeclipse-jdt-compiler-apt-java, libeclipse-jdt-compiler-tool-java, libeclipse-jdt-core-java.
You might like to refer to the ecj package page, to the Package Tracking System, or to the source package src:eclipse-jdt-core's bug page.
If you find a bug not listed here, please report it.