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-rw-r--r--coverage/python.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/coverage/python.py b/coverage/python.py
index 8e98bea8..601318c5 100644
--- a/coverage/python.py
+++ b/coverage/python.py
@@ -51,7 +51,9 @@ def get_python_source(filename):
break
else:
# Couldn't find source.
- raise NoSource("No source for code: '%s'." % filename)
+ exc_msg = "No source for code: '%s'.\n" % (filename,)
+ exc_msg += "Aborting report output, consider using -i."
+ raise NoSource(exc_msg)
# Replace \f because of http://bugs.python.org/issue19035
source = source.replace(b'\f', b' ')