-x seems not accept sub-dir

[assalyn]

In my case, when use cmd:
gin -i -p 3014 -b gateway -t src -d src/server/gateway -x src/test
the -x src/test seems doesn't work. any modify in test directory will cause recompile

but, when enter src/
use cmd
gin -i -p 3014 -b gateway -t . -d server/gateway -x test
then, it's all ok.

So I guess maybe some flaw in -x ?

environment:
golang1.9
cgywin in win10