http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50378
--- Comment #10 from Vittorio Zecca <zeccav at gmail dot com> 2011-09-14 20:01:17 UTC --- gfortran 4.7.0 has been compiled with the old mpfr 2.4.2, I just downloaded it, this one will probably work. Anyway gfortran 4.7.0 does not give free() errors.