Cygwin native built gfortran 4.4 was already broken, even when it was making it through bootstrap and testsuite. All comments I've received told me I was wasting my time with it.
Where is that bug reported? cygwin is secondary target, I think it should really be unbroken, with the help of its maintainers (and possibly by identifying the patch that broke bootstrap).
FX -- François-Xavier Coudert http://www.homepages.ucl.ac.uk/~uccafco/