mrbayes-dbg 3.2.3+dfsg-1 (armhf binary) in ubuntu vivid

 Bayesian inference of phylogeny is based upon a quantity called the posterior
 probability distribution of trees, which is the probability of a tree
 conditioned on the observations. The conditioning is accomplished using
 Bayes's theorem. The posterior probability distribution of trees is
 impossible to calculate analytically; instead, MrBayes uses a simulation
 technique called Markov chain Monte Carlo (or MCMC) to approximate the
 posterior probabilities of trees.
 .
 The package provides the debug symbols that are otherwise stripped from
 the binaries to reduce the footprint of the package. This package can be
 installed to help debugging of problems when running mrbayes.