Sorry for the delay, exams going on. So i ran it with "gdb python" but still nothing :

Working directory /Users/chintak/Repositories/scikit-image.
(gdb) run setup.py build_ext -i
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /usr/local/bin/python setup.py build_ext -i
Program received signal SIGTRAP, Trace/breakpoint trap.
0x00007fff5fc01028 in __dyld__dyld_start ()
(gdb) bt
#0 0x00007fff5fc01028 in __dyld__dyld_start ()
#1 0x0000000100000000 in ?? ()
(gdb) make coverage
nosetests skimage --with-coverage --cover-package=skimage
make: *** [coverage] Segmentation fault: 11
(gdb) bt
#0 0x00007fff5fc01028 in __dyld__dyld_start ()
#1 0x0000000100000000 in ?? ()
(gdb)

After getting the segmentation error it just says "Python quit unexpectedly". Can we get any information from Seg fault "11". Any idea what the error code represents ?

Chintak