Synchronization error

error: Unable to fully sync the tree.
error: Checking out local projects failed.
Failing repos:
external/libunwind
external/kmod
frameworks/compile/slang
external/autotest
Try re-running with "-j1 --fail-fast" to exit at the first error.


If you execute repo ysnc -j1 -- fail fast multiple times, you will be prompted with the following error


