Maintainers for gcc-4.2 are Debian GCC Maintainers <debian-gcc@lists.debian.org>.
You may want to refer to the following individual bug pages: cpp-4.2, g++-4.2, g++-4.2-multilib, gcc-4.2-base, gcc-4.2-hppa64, gcc-4.2-locales, gcc-4.2-multilib, gcc-4.2-source, gfortran-4.2, gfortran-4.2-multilib, gobjc++-4.2, gobjc++-4.2-multilib, gobjc-4.2, gobjc-4.2-multilib, lib32gfortran2, lib32gfortran2-dbg, lib32stdc++6-4.2-dbg, lib64gfortran2, lib64gfortran2-dbg, lib64stdc++6-4.2-dbg, libgfortran2, libgfortran2-dbg, libmudflap0-4.2-dev, libstdc++6-4.2-dbg, libstdc++6-4.2-dev, libstdc++6-4.2-doc, libstdc++6-4.2-pic.
You might like to refer to the gcc-4.2 package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.