dsun@dsun-voyager:~/Dropbox/Programs/git_repos/pebl_bionic$ colcon build
ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.environment_variable.powershell_command': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_powershell/shell/powershell.py", line 17, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

Starting >>> romela_peble
[0.246s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.zsh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_zsh/shell/zsh.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.247s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.powershell': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_powershell/shell/powershell.py", line 17, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.248s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bat': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/bat.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.248s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.dsv': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/dsv.py", line 9, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.249s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.sh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/sh.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.251s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bash': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_bash/shell/bash.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.252s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.zsh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_zsh/shell/zsh.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.253s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.powershell': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_powershell/shell/powershell.py", line 17, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.253s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bat': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/bat.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.254s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.dsv': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/dsv.py", line 9, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.255s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.sh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/sh.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.256s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bash': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_bash/shell/bash.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.256s] ERROR:colcon.colcon_cmake.task.cmake.build:Could not find a shell extension for the command environment
Failed   <<< romela_peble	[ Exited with code 1 ]

Summary: 0 packages finished [0.14s]
  1 package failed: romela_peble
[0.295s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.zsh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_zsh/shell/zsh.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.296s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.powershell': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_powershell/shell/powershell.py", line 17, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.296s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bat': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/bat.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.297s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.dsv': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/dsv.py", line 9, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.297s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.sh': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_core/shell/sh.py", line 15, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'

[0.298s] ERROR:colcon.colcon_core.entry_point:Exception loading extension 'colcon_core.shell.bash': cannot import name 'Interpreter'
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 98, in load_entry_points
    extension_type = load_entry_point(entry_point)
  File "/usr/lib/python3/dist-packages/colcon_core/entry_point.py", line 140, in load_entry_point
    return entry_point.load()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2324, in load
    return self.resolve()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 2330, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python3/dist-packages/colcon_bash/shell/bash.py", line 13, in <module>
    from colcon_core.shell.template import expand_template
  File "/usr/lib/python3/dist-packages/colcon_core/shell/template/__init__.py", line 8, in <module>
    from em import Interpreter
ImportError: cannot import name 'Interpreter'