Test the debug settings more, and strip spaces from the environment variable

2 files changed, 2 insertions, 2 deletions

diff --git a/coverage/control.py b/coverage/control.py
index f7be083d..8bca939c 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -162,7 +162,7 @@ class Coverage(object):
             self.config.data_file = env_data_file
         debugs = os.environ.get('COVERAGE_DEBUG')
         if debugs:
-            self.config.debug.extend(debugs.split(","))
+            self.config.debug.extend(d.strip() for d in debugs.split(","))
 
         # 4: from constructor arguments:
         self.config.from_args(
diff --git a/coverage/data.py b/coverage/data.py
index bd114627..50b309af 100644
--- a/coverage/data.py
+++ b/coverage/data.py
@@ -719,7 +719,7 @@ class CoverageDataFiles(object):
             raise CoverageException("No data to combine")
 
         for f in files_to_combine:
-            new_data = CoverageData()
+            new_data = CoverageData(debug=self.debug)
             try:
                 new_data.read_file(f)
             except CoverageException as exc: