From 5c157a28c46b2f5ed9e9051e5b6c8d461b490f1b Mon Sep 17 00:00:00 2001
From: Stephan Richter <stephan.richter@gmail.com>
Date: Thu, 24 Jan 2019 07:44:39 -0500
Subject: Add ability to report contexts for all lines of a file.

---
 coverage/data.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'coverage/data.py')

diff --git a/coverage/data.py b/coverage/data.py
index e393345a..71d6624d 100644
--- a/coverage/data.py
+++ b/coverage/data.py
@@ -253,6 +253,9 @@ class CoverageJsonData(object):
             return self._file_tracers.get(filename, "")
         return None
 
+    def contexts_by_lineno(self, filename):
+        return collections.defaultdict(list)
+
     def run_infos(self):
         """Return the list of dicts of run information.
 
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