From 1d1c0ec3af7b65d66ce63baf23d51f5bb318f961 Mon Sep 17 00:00:00 2001
From: Dave Halter <davidhalter88@gmail.com>
Date: Sun, 14 Jun 2020 17:55:49 +0200
Subject: [PATCH] Better debugging output for is_sub_class_of

---
 jedi/debug.py                |  6 +++---
 jedi/inference/base_value.py | 12 ++++++++----
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/jedi/debug.py b/jedi/debug.py
index 4136acf4..753930e1 100644
--- a/jedi/debug.py
+++ b/jedi/debug.py
@@ -84,17 +84,17 @@ def increase_indent(func):
 
 
 @contextmanager
-def increase_indent_cm(title=None):
+def increase_indent_cm(title=None, color='MAGENTA'):
     global _debug_indent
     if title:
-        dbg('Start: ' + title, color='MAGENTA')
+        dbg('Start: ' + title, color=color)
     _debug_indent += 1
     try:
         yield
     finally:
         _debug_indent -= 1
         if title:
-            dbg('End: ' + title, color='MAGENTA')
+            dbg('End: ' + title, color=color)
 
 
 def dbg(message, *args, **kwargs):
diff --git a/jedi/inference/base_value.py b/jedi/inference/base_value.py
index 075de49a..8d7b0961 100644
--- a/jedi/inference/base_value.py
+++ b/jedi/inference/base_value.py
@@ -114,10 +114,14 @@ class HelperValueMixin(object):
         return self.py__iter__(contextualized_node)
 
     def is_sub_class_of(self, class_value):
-        for cls in self.py__mro__():
-            if cls.is_same_class(class_value):
-                return True
-        return False
+        with debug.increase_indent_cm('subclass matching of %s <=> %s' % (self, class_value),
+                                      color='BLUE'):
+            for cls in self.py__mro__():
+                if cls.is_same_class(class_value):
+                    debug.dbg('matched subclass True', color='BLUE')
+                    return True
+            debug.dbg('matched subclass False', color='BLUE')
+            return False
 
     def is_same_class(self, class2):
         # Class matching should prefer comparisons that are not this function.