ruby-narray-dbg 0.6.0.1-3 (amd64 binary) in ubuntu trusty

 NArray is an extension library for Ruby that provides fast calculation and
 easy manipulation of large numerical arrays with the Ruby language. It has
 numerical n-dimensional array class as well as vector and matrix subclasses,
 which can contain 1/2/4-byte Integer, single/double-precision Real/Complex and
 Ruby Object.
 .
 This package is provided primarily to provide a backtrace with names
 in a debugger, this makes it somewhat easier to interpret core
 dumps. Most people will not need this package.