CoverageData.lines() and CoverageData.arcs() now distinguish between unmeasured, and measured, but nothing ran

1 files changed, 2 insertions, 2 deletions

diff --git a/coverage/results.py b/coverage/results.py
index 65e70c75..c7a2f95e 100644
--- a/coverage/results.py
+++ b/coverage/results.py
@@ -17,7 +17,7 @@ class Analysis(object):
         self.excluded = self.file_reporter.excluded_statements()
 
         # Identify missing statements.
-        executed = self.data.lines(self.filename)
+        executed = self.data.lines(self.filename) or []
         executed = self.file_reporter.translate_lines(executed)
         self.missing = self.statements - executed
 
@@ -61,7 +61,7 @@ class Analysis(object):
 
     def arcs_executed(self):
         """Returns a sorted list of the arcs actually executed in the code."""
-        executed = self.data.arcs(self.filename)
+        executed = self.data.arcs(self.filename) or []
         executed = self.file_reporter.translate_arcs(executed)
         return sorted(executed)