Bug 1373789 - Handle some kinds of malformed lcov lines better. r=chmanchester

--HG--
extra : rebase_source : 43b52f283ebd5c03de54ad46bbbf49046ae21051

python/mozbuild/mozbuild/codecoverage/lcov_rewriter.py

@@ -293,6 +293,10 @@ class LcovFile(object):
                 print("Invalid lcov line start at %s:%d:\n%s" %
                       (lcov_fh.name, count + 1, line))
                 raise
+            except TypeError:
+                print("Invalid lcov line start at %s:%d:\n%s" %
+                      (lcov_fh.name, count + 1, line))
+                raise
 
     def print_file(self, fh):
         for record in self.records: