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-rw-r--r--ot/lp/__init__.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ot/lp/__init__.py b/ot/lp/__init__.py
index 2a1b082..f08e020 100644
--- a/ot/lp/__init__.py
+++ b/ot/lp/__init__.py
@@ -426,7 +426,7 @@ def emd2(a, b, M, processes=multiprocessing.cpu_count(),
nb = b.shape[1]
if processes > 1:
- res = parmap(f, [b[:, i] for i in range(nb)], processes)
+ res = parmap(f, [b[:, i].copy() for i in range(nb)], processes)
else:
res = list(map(f, [b[:, i].copy() for i in range(nb)]))