Adapt to the full_line_map change in Mako

1 files changed, 6 insertions, 2 deletions

diff --git a/coverage/codeunit.py b/coverage/codeunit.py
index 179de017..9282687d 100644
--- a/coverage/codeunit.py
+++ b/coverage/codeunit.py
@@ -236,8 +236,12 @@ class MakoParser(CodeParser):
         return executable, set()
 
     def translate_lines(self, lines):
-        tlines = set(self.metadata['full_line_map'].get(l, -1) for l in lines)
-        tlines.remove(-1)
+        tlines = set()
+        for l in lines:
+            try:
+                tlines.add(self.metadata['full_line_map'][l])
+            except IndexError:
+                pass
         return tlines