crash.sh

# Launch new server
#	Ubuntu Server 16.04 LTS (HVM), SSD Volume Type - ami-2afbde4a
#	all the default configuration settings

echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" | \
     sudo tee /etc/apt/sources.list.d/pgdg.list
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | \
     sudo apt-key add -
sudo apt-get update

sudo apt-get install -y postgresql-server-dev-9.5 postgresql-9.5 \
                        libedit-dev libselinux1-dev libxslt-dev  \
                        libpam0g-dev git flex make libssl-dev libkrb5-dev

git clone https://github.com/citusdata/citus.git
cd citus
git checkout v5.2.2
./configure
make
sudo make install

sudo pg_conftool 9.5 main set shared_preload_libraries citus
sudo pg_ctlcluster 9.5 main restart

sudo su - postgres
psql --cluster 9.5/main -c "CREATE EXTENSION citus;"
exit

# current location of master branch
git checkout b94285c575
./configure
make
sudo make install

sudo pg_ctlcluster 9.5 main restart

This is called crash.sh. Is there an actual crash here?