Traceback (most recent call last):
File "/snap/charm/15/bin/charm-build", line 11, in <module>
sys.exit(main())
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 679, in main
build()
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 522, in __call__
self.generate()
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 474, in generate
self.formulate_plan(layers)
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 415, in formulate_plan
self.plan = self.plan_layers(layers, output_files)
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 330, in plan_layers
output_files=output_files))
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 326, in <genexpr>
list(e for e in utils.walk(layer.directory,
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/utils.py", line 348, in walk
yield (entry, fn(entry, **kwargs))
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/builder.py", line 303, in build_tactics
existing_tactic,
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/tactics.py", line 53, in get
tactic = tactic.combine(existing_tactic)
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/build/tactics.py", line 394, in combine
self.data = utils.deepmerge(existing.data, self.data)
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/utils.py", line 59, in deepmerge
deepmerge(dest[k], v)
File "/snap/charm/15/lib/python2.7/site-packages/charmtools/utils.py", line 63, in deepmerge
dest[k].append(item)
AttributeError: 'CommentedMap' object has no attribute 'append'