libc6-dbg 2.8~20080505-0ubuntu2 (amd64 binary) in ubuntu intrepid

 Contains unstripped shared libraries.
 This package is provided primarily to provide a backtrace with
 names in a debugger, which makes it somewhat easier to interpret core
 dumps. The libraries are installed in /usr/lib/debug and can be
 used by placing that directory in LD_LIBRARY_PATH.
 Most people will not need this package.