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--- pyamg/gallery/stencil.py.orig 2011-08-06 20:26:36.000000000 +0100
+++ pyamg/gallery/stencil.py 2011-08-06 20:27:12.000000000 +0100
@@ -85,7 +85,7 @@
# compute index offset of each dof within the stencil
strides = numpy.cumprod( [1] + list(reversed(grid)) )[:-1]
- indices = S.nonzero()
+ indices = tuple(i.copy() for i in S.nonzero())
for i,s in zip(indices,S.shape):
i -= s // 2
for stride,coords in zip(strides, reversed(indices)):
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