Fix tuple unpacking bug (related to old temps)

Cython/Compiler/ExprNodes.py

@@ -3003,11 +3003,12 @@ class SequenceNode(NewTempExprNode):
     
     def allocate_target_temps(self, env, rhs):
         self.iterator.allocate_temps(env)
-        for arg, node in zip(self.args, self.coerced_unpacked_items):
+        for node in self.coerced_unpacked_items:
             node.allocate_temps(env)
-            arg.allocate_target_temps(env, None)
             #arg.release_target_temp(env)
             #node.release_temp(env)
+        for arg in self.args:
+            arg.allocate_target_temps(env, None)
         if rhs:
             rhs.release_temp(env)
         self.iterator.release_temp(env)

tests/run/tupleunpack_Thmm.pyx

+"""
+>>> func()
+0 0
+0
+0
+1 1
+1
+1
+2 2
+2
+2
+>>> func2()
+"""
+
+def g():
+    return ((3, 2), 1, 0)
+
+def func2():
+    (a, b), c, d = g()
+
+def func():
+    for (a, b),c ,d in zip(zip(range(3), range(3)), range(3), range(3)):
+        print a, b
+        print c
+        print d