hunspell rises a FLoating point exception if the $HOME/.hunspell_en_US file is not empty and the current working directory contains an empty en_US.dic file.
Here:
_ZN8Hunspell3addEPKc(0x1f08e60, 0x60e780, 0, 0x1f11c00 <no return="" ...="">
occurs with 1.3.3