Fixes a bug with unanalysed ResultRefNodes.

This fixes #1523.

2 files changed, 11 insertions, 0 deletions

diff --git a/Cython/Compiler/UtilNodes.py b/Cython/Compiler/UtilNodes.py
index fb1c9e9d8..862557c66 100644
--- a/Cython/Compiler/UtilNodes.py
+++ b/Cython/Compiler/UtilNodes.py
@@ -149,6 +149,7 @@ class ResultRefNode(AtomicExprNode):
 
     def analyse_types(self, env):
         if self.expression is not None:
+            self.expression = self.expression.analyse_types(env)
             self.type = self.expression.type
         return self
 
diff --git a/tests/run/unpack.pyx b/tests/run/unpack.pyx
index becb6fbe8..91bf4d634 100644
--- a/tests/run/unpack.pyx
+++ b/tests/run/unpack.pyx
@@ -393,3 +393,13 @@ def unpack_literal_none_to_exttype():
     cdef ExtType a,b,c,d
     a, b = c, d = None, None
     return a,b,c,d
+
+
+# Github issue #1523
+def test_unpack_resultref():
+    """
+    >>> test_unpack_resultref()
+    ((1, set([])), 1, set([]))
+    """
+    a = b, c = 1, set()
+    return a, b, c