The trace module was trying to turn ints into ints since co_lnotab was changed
to a bytes object.
diff --git a/Misc/NEWS b/Misc/NEWS
index c2b4ed8..95468b4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -147,6 +147,9 @@
 Library
 -------
 
+- Fix a bug in the trace module where a bytes object from co_lnotab had its
+  items being passed through ord().
+
 - Issue #2047: shutil.move() could believe that its destination path was
   inside its source path if it began with the same letters (e.g. "src" vs.
   "src.new").