before_script curl download fails to write font file on Travis CI

thanks for your work on Travis-CI !

I'm hitting a roadblock as I'm downloading a font to test my app. However, writing the file to the disk fail due to some obscure reason.

$ bash ./test/fetch-fonts.bash
% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                               Dload  Upload   Total   Spent    Left  Speed

100   176  100   176    0     0    526      0 --:--:-- --:--:-- --:--:--   533
Warning: Failed to create the file 
Warning: ./resources/fonts/DroidSansFallbackFull.ttf: No such file or 
Warning: directory
0 3938k    0  1925    0     0   4737      0  0:14:11 --:--:--  0:14:11  4737
curl: (23) Failed writing body (0 != 1925)
The command "bash ./test/fetch-fonts.bash" failed and exited with 23 during .

How could I solve this?