Garbage databases are easy enough to create by hitting Ctrl-C while running the test suite. The subprocess currently running tests aborts, possibly after calling cleanup, but the parent test process then barfs and certainly doesn't call any cleanup:

Traceback (most recent call last):
  File "bin/test", line 275, in <module>
      Set up canonical.testing.layers.FunctionalLayer
testrunner.run([])
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/__init__.py", line 32, in run
    failed = run_internal(defaults, args, script_parts=script_parts)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/__init__.py", line 45, in run_internal
    runner.run()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 138, in run
    self.run_tests()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 238, in run_tests
    layers_to_run, self.failures, self.errors)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 587, in resume_tests
    time.sleep(0.01) # Keep the loop from being too tight.
KeyboardInterrupt
SIGINT handled.
Traceback (most recent call last):
  File "bin/test", line 275, in <module>
    testrunner.run([])
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/__init__.py", line 32, in run
    failed = run_internal(defaults, args, script_parts=script_parts)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/__init__.py", line 45, in run_internal
    runner.run()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 138, in run
    self.run_tests()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 219, in run_tests
    setup_layers, self.failures, self.errors)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 367, in run_layer
    setup_layer(options, layer, setup_layers)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 643, in setup_layer
    setup_layer(options, base, setup_layers)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.testing-3.9.4_p3-py2.6.egg/zope/testing/testrunner/runner.py", line 648, in setup_layer
    layer.setUp()
  File "/home/stub/lp/trivial/lib/canonical/testing/profiled.py", line 29, in profiled_func
    return func(cls, *args, **kw)
  File "/home/stub/lp/trivial/lib/canonical/testing/layers.py", line 1042, in setUp
    FunctionalTestSetup().setUp()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.app.testing-3.7.5-py2.6.egg/zope/app/testing/functional.py", line 215, in __init__
    self.app = Debugger(self.db, config_file)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.app.debug-3.4.1-py2.6.egg/zope/app/debug/debug.py", line 36, in __init__
    config(config_file)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.app.appsetup-3.12.0-py2.6.egg/zope/app/appsetup/appsetup.py", line 111, in config
    context = xmlconfig.file(file, context=context, execute=execute)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 647, in file
    include(context, name, package)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 546, in include
    processxmlfile(f, context)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 378, in processxmlfile
    parser.parse(src)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.6/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 349, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 357, in endElementNS
    self.context.end()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 537, in end
    self.stack.pop().finish()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 685, in finish
    actions = self.handler(context, **args)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 546, in include
    processxmlfile(f, context)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 378, in processxmlfile
    parser.parse(src)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.6/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 349, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 357, in endElementNS
    self.context.end()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 537, in end
    self.stack.pop().finish()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 685, in finish
    actions = self.handler(context, **args)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 546, in include
    processxmlfile(f, context)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 378, in processxmlfile
    parser.parse(src)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.6/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 349, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 357, in endElementNS
    self.context.end()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 537, in end
    self.stack.pop().finish()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 685, in finish
    actions = self.handler(context, **args)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 546, in include
    processxmlfile(f, context)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 378, in processxmlfile
    parser.parse(src)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 107, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.6/xml/sax/xmlreader.py", line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 207, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python2.6/xml/sax/expatreader.py", line 349, in end_element_ns
    self._cont_handler.endElementNS(pair, None)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/xmlconfig.py", line 357, in endElementNS
    self.context.end()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 537, in end
    self.stack.pop().finish()
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 684, in finish
    args = toargs(context, *self.argdata)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 1376, in toargs
    args[str(name)] = field.fromUnicode(s)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/fields.py", line 229, in fromUnicode
    v = vt.fromUnicode(s)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/fields.py", line 139, in fromUnicode
    value = self.context.resolve(name)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.configuration-3.6.0-py2.6.egg/zope/configuration/config.py", line 180, in resolve
    mod = __import__(mname, *_import_chickens)
  File "/home/stub/lp/trivial/lib/lp/scripts/utilities/importfascist.py", line 190, in import_fascist
    module = original_import(name, globals, locals, fromlist, level)
  File "/home/stub/lp/trivial/lib/canonical/launchpad/browser/__init__.py", line 36, in <module>
    from lp.code.browser.branchmergeproposal import *
  File "/home/stub/lp/trivial/lib/lp/scripts/utilities/importfascist.py", line 190, in import_fascist
    module = original_import(name, globals, locals, fromlist, level)
  File "/home/stub/lp/trivial/lib/lp/code/browser/branchmergeproposal.py", line 101, in <module>
    from lp.code.browser.codereviewcomment import CodeReviewDisplayComment
  File "/home/stub/lp/trivial/lib/lp/scripts/utilities/importfascist.py", line 190, in import_fascist
    module = original_import(name, globals, locals, fromlist, level)
  File "/home/stub/lp/trivial/lib/lp/code/browser/codereviewcomment.py", line 52, in <module>
    class CodeReviewDisplayComment:
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/advice.py", line 129, in advise
    newClass = meta(name,bases,cdict)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/advice.py", line 132, in advise
    return callback(newClass)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/declarations.py", line 484, in _implements_advice
    classImplements(cls, *interfaces)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/declarations.py", line 460, in classImplements
    spec = implementedBy(cls)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/declarations.py", line 354, in implementedByFallback
    spec = Implements(*[implementedBy(c) for c in bases])
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/declarations.py", line 46, in __init__
    Specification.__init__(self, _normalizeargs(interfaces))
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/interface.py", line 261, in __init__
    self.__bases__ = tuple(bases)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/interface.py", line 285, in __setBases
    self.changed(self)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/declarations.py", line 49, in changed
    Specification.changed(self, originally_changed)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/interface.py", line 300, in changed
    ancestors = ro(self)
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/ro.py", line 24, in ro
    return mergeOrderings([_flatten(object)])
  File "/home/stub/lp/lp-sourcedeps/eggs/zope.interface-3.5.2-py2.6-linux-x86_64.egg/zope/interface/ro.py", line 54, in mergeOrderings
    seen[o] = 1
KeyboardInterrupt

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Could not communicate with subprocess
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