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| author | Allan Haldane <allan.haldane@gmail.com> | 2018-02-17 14:36:49 -0500 |
|---|---|---|
| committer | Allan Haldane <allan.haldane@gmail.com> | 2018-02-18 23:22:01 -0500 |
| commit | 50fde71f1ac0528f40ee216136b33fde41205ef2 (patch) | |
| tree | 8027f9c741d643efa82fcd3963dfdc90e14a9428 /numpy/core/shape_base.py | |
| parent | 4105af42c38539e8bf854c49134fe221d86ec79d (diff) | |
| download | numpy-50fde71f1ac0528f40ee216136b33fde41205ef2.tar.gz | |
BUG: break cyclic refs in recursive closures
Fixes #10620
Diffstat (limited to 'numpy/core/shape_base.py')
| -rw-r--r-- | numpy/core/shape_base.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/numpy/core/shape_base.py b/numpy/core/shape_base.py index 65c3ed00d..319c25088 100644 --- a/numpy/core/shape_base.py +++ b/numpy/core/shape_base.py @@ -446,7 +446,13 @@ def _block(arrays, max_depth, result_ndim): # type(arrays) is not list return atleast_nd(arrays, result_ndim) - return block_recursion(arrays) + try: + return block_recursion(arrays) + finally: + # recursive closures have a cyclic reference to themselves, which + # requires gc to collect (gh-10620). To avoid this problem, for + # performance and PyPy friendliness, we break the cycle: + block_recursion = None def block(arrays): |