Closed
Description
The lines at
numpy/numpy/core/src/umath/extobj.c
Lines 40 to 46 in 018fb37
are wrong. Before getting that error, the previous error may already have been default (or may not have been set at all). In that case, a "num-defaults" is decremented. This logic really needs to check the previous state more than the current, I think.
This can be triggered using only one thread, even with np.errstate:
arr = np.arange(3)
with np.errstate(all="raise"):
with np.errstate("all="ignore"):
pass
# gives the correct value, but uses the lookup (using threads, the opposite will be possible
# -- although not super likely -- using the "defaults" even though the defaults are not set.
np.add(arr, arr)