Something on Travis CI's side has changed such that invoking the 'wait' command within a script attempts to wait on some other jobs in addition to those spawned within the CI job.
Workaround is to explicitly collect the PIDs for processes spawned within the script and only wait on those.
Primary cause of false Travis CI failures was running 'apt-get update'.
Refactored all instances where this was needed with manually fetching and installing dependencies in S3 instace.
This also includes GCC installation.
Cruz Monrreal II