From c399478e86892f0e7ade51873dfbe13f87ecfa83 Mon Sep 17 00:00:00 2001
From: Stephan Richter <stephan.richter@gmail.com>
Date: Sun, 12 May 2019 12:17:41 -0400
Subject: Support for full qnames for old-style classes.

---
 coverage/context.py | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'coverage/context.py')

diff --git a/coverage/context.py b/coverage/context.py
index fb1b76ac..d2f75db2 100644
--- a/coverage/context.py
+++ b/coverage/context.py
@@ -78,5 +78,19 @@ def qualname_from_frame(frame):
                 qname = cls.__module__ + '.' + cls.__name__ + "." + fname
                 break
         else:
-            qname = func.__module__ + '.' + fname
+            # Support for old-style classes.
+            def mro(bases):
+                for base in bases:
+                    f = base.__dict__.get(fname, None)
+                    if f is func:
+                        return base.__module__ + '.' + base.__name__ + "." + fname
+                for base in bases:
+                    qname = mro(base.__bases__)
+                    if qname is not None:
+                        return qname
+                return None
+            qname = mro([self.__class__])
+            if qname is None:
+                qname = func.__module__ + '.' + fname
+
     return qname
-- 
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