19 lines
730 B
Diff
19 lines
730 B
Diff
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diff --git a/src/sage/libs/pari/__init__.py b/src/sage/libs/pari/__init__.py
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index e451766474..77eda66097 100644
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--- a/src/sage/libs/pari/__init__.py
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+++ b/src/sage/libs/pari/__init__.py
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@@ -205,6 +205,13 @@ def _get_pari_instance():
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# messages in Sage.
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P.default("debugmem", 0)
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+ # Make sure pari doesn't use threads, regardless of how it was compiled.
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+ # Threads cause some doctest failures (memory issues). Those could probably
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+ # be solved without disabling threads. But that would require figuring out
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+ # some sensible values for `threadsizemax`. See
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+ # https://pari.math.u-bordeaux.fr/dochtml/html/GP_defaults.html
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+ P.default("nbthreads", 1)
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+
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return P
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pari = _get_pari_instance()
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