Don't emit no-init if not all the bases from a class are known.

Closes issue #604.

3 files changed, 10 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 7a9dfa6..4d5afe3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -222,7 +222,9 @@ ChangeLog for Pylint
 
     * Improve detection of relative imports in non-packages, as well as importing
       missing modules with a relative import from a package.
-      
+
+    * Don't emit no-init if not all the bases from a class are known.
+      Closes issue #604.      
       
 
 
diff --git a/pylint/checkers/classes.py b/pylint/checkers/classes.py
index c4f7ff0..edbc36b 100644
--- a/pylint/checkers/classes.py
+++ b/pylint/checkers/classes.py
@@ -307,7 +307,7 @@ a metaclass class method.'}
         self._accessed.append(defaultdict(list))
         self._check_bases_classes(node)
         # if not an exception or a metaclass
-        if node.type == 'class':
+        if node.type == 'class' and helpers.has_known_bases(node):
             try:
                 node.local_attr('__init__')
             except astroid.NotFoundError:
diff --git a/pylint/test/functional/init_not_called.py b/pylint/test/functional/init_not_called.py
index e22be39..43629c7 100644
--- a/pylint/test/functional/init_not_called.py
+++ b/pylint/test/functional/init_not_called.py
@@ -1,4 +1,4 @@
-# pylint: disable=R0903
+# pylint: disable=R0903,import-error, missing-docstring
 """test for __init__ not called
 """
 from __future__ import print_function
@@ -57,3 +57,8 @@ class AssignedInit(NewStyleC):
     """No init called."""
     def __init__(self):  # [super-init-not-called]
         self.arg = 0
+
+from missing import Missing
+
+class UnknownBases(Missing):
+    """Don't emit no-init if the bases aren't known."""