Emit a warning when an invalid file is detected with ignore_errors=true.

Previously, when an invalid file was encountered, it would be silently
ignored.

1 files changed, 5 insertions, 2 deletions

diff --git a/coverage/report.py b/coverage/report.py
index 2ffbbaa..981657c 100644
--- a/coverage/report.py
+++ b/coverage/report.py
@@ -97,5 +97,8 @@ class Reporter(object):
                 # explicitly suppress those errors.
                 # NotPython is only raised by PythonFileReporter, which has a
                 # should_be_python() method.
-                if fr.should_be_python() and not self.config.ignore_errors:
-                    raise
+                if fr.should_be_python(): 
+                    if self.config.ignore_errors:
+                        self.coverage._warn("Could not parse python file {0}".format(fr.filename))
+                    else:
+                        raise