Using grunt for a while now, I was in front of an unknown behavior for this kind of tool…
Using my all time running well
$> grunt serve
command, suddendly, after a bad karma installation, I was in front of :
Waiting...Fatal error: watch ENOSPC
Then I digg the dugg and found the graal on the StashExchange problem solver:
Please, have a try with the following magic command to restore a normal behavior for the « grunt serve »
$> npm dedupe
And grunt magic come back !
Have Fun !