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3f305e43 · Stefan Behnel · 22dda2e4 · 3f305e43
Commit 3f305e43 authored Dec 09, 2009 by Stefan Behnel
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Cython/Compiler/Optimize.py Cython/Compiler/Optimize.py +3 -0

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--- a/Cython/Compiler/Optimize.py
+++ b/Cython/Compiler/Optimize.py
@@ -616,6 +616,9 @@ class DropRefcountingTransform(Visitor.VisitorTransform):
    visit_Node = Visitor.VisitorTransform.recurse_to_children
    def visit_ParallelAssignmentNode(self, node):
+        """
+        Parallel swap assignments like 'a,b = b,a' are safe.
+        """
        left_names, right_names = [], []
        left_indices, right_indices = [], []
        temps = []