Handle class with one kwarg subclass

test/Makefile

@@ -37,6 +37,7 @@ check-3.0: check-bytecode
 #: Run working tests from Python 3.1
 check-3.1: check-bytecode
 	$(PYTHON) test_pythonlib.py --bytecode-3.1 --weak-verify $(COMPILE)
+	$(PYTHON) test_pythonlib.py --bytecode-3.1-run --verify-run
 
 #: Run working tests from Python 3.2
 check-3.2: check-bytecode
@@ -201,6 +202,7 @@ check-bytecode-3.0:
 #: Check deparsing Python 3.1
 check-bytecode-3.1:
 	$(PYTHON) test_pythonlib.py --bytecode-3.1 --weak-verify
+	$(PYTHON) test_pythonlib.py --bytecode-3.1-run --verify-run
 
 #: Check deparsing Python 3.2
 check-bytecode-3.2:

test/simple_source/bug31/05_abc_test.py

@@ -0,0 +1,18 @@
+# Extracted from Python 3.5 test_abc.py
+# Bug is class having only a single kwarg
+# subclass.
+import abc
+import unittest
+from inspect import isabstract
+
+def test_abstractmethod_integration(self):
+    for abstractthing in [abc.abstractmethod]:
+        class C(metaclass=abc.ABCMeta):
+            @abstractthing
+            def foo(self): pass  # abstract
+            def bar(self): pass  # concrete
+        assert C.__abstractmethods__, {"foo"}
+        assert isabstract(C)
+        pass
+
+test_abstractmethod_integration(None)

uncompyle6/semantics/pysource.py

@@ -1393,9 +1393,15 @@ class SourceWalker(GenericASTTraversal, object):
     def print_super_classes3(self, node):
         n = len(node) - 1
         if node.kind != 'expr':
-            assert node[n].kind.startswith('CALL_FUNCTION')
+            if node == 'kwarg':
+                self.write('(')
+                self.template_engine(('%[0]{pattr}=%c', 1), node)
+                self.write(')')
+                return
 
             kwargs = None
+            assert node[n].kind.startswith('CALL_FUNCTION')
+
             if node[n].kind.startswith('CALL_FUNCTION_KW'):
                 # 3.6+ starts does this
                 kwargs = node[n-1].attr