Why shell is crashing using "source /opt/ros/kinetic/setup.bash" after standard installation approach with ubuntu 16.04 xenial?

edit

Hey everyone, recently i tried to install ros with the standard installation method from http://wiki.ros.org/kinetic/Installat... with the follwing steps:
1)

sudo sh -c '. /etc/lsb-release && echo "deb http://packages.ros.org.ros.informatik.uni-freiburg.de/ros/ubuntu $DISTRIB_CODENAME main" > /etc/apt/sources.list.d/ros-latest.list'

2)

sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-key 421C365BD9FF1F717815A3895523BAEEB01FA116

3)

sudo apt-get update

4)

sudo apt-get install ros-kinetic-desktop-full

5)

sudo rosdep init
rosdep update

Warning: running 'rosdep update' as root is not recommended. You should run 'sudo rosdep fix-permissions' and invoke 'rosdep update' again without sudo.

sudo rosdep fix-permissions

6)

echo "source /opt/ros/kinetic/setup.bash" >> ~/.bashrc
source ~/.bashrc

....and this is what i'm encountering in my console:

File "<string>", line 1
    import os; print(os.pathsep.join([x for x in "/opt/ros/kinetic/bin:/home/inecho/bin:/home/inecho/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games" JAVA_HOME="/usr/lib/jvm/java-8-oracle/jre/bin/java:/snap/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/sk/android-sdk-linux/tools:/usr/local/cuda/bin:/home/sk/android-sdk-linux/platform-tools".split(os.pathsep) if not any([d for d in ['cturtle', 'diamondback', 'electric', 'fuerte'] if d in x])]))
                                                                                                                                                                                                                  ^
SyntaxError: invalid syntax
bash: cat: No such file or directory
bash: cat: No such file or directory
bash: python: No such file or directory
bash: awk: No such file or directory
bash: grep: No such file or directory

Afterwards i am not able to type any of shell-commands like ls until i uncomment the line in ~/.bashrc again. This is what happens:

inecho@inecho-P50:~$ ls
bash: ls: No such file or directory

Does anyone has a clue whats happening there?

The last lines of my .bashrcnow with the uncommented setup.bash:

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

export PATH=${PATH}:/home/sk/android-sdk-linux/tools:/usr/local/cuda/bin
export PATH=${PATH}:/home/sk/android-sdk-linux/platform-tools
export LD_LIBRARY_PATH=/usr/local/cuda/lib64
# source /opt/ros/kinetic/setup.bash