Describe the issue:

Getting an error with numpy version 1.25.0 when doing matrix multiplication with operator '@'.

When an array surpasses a certain size limit. Multiplying the two matrices produces a RuntimeWarning.

However, the warning is gone when downgrading numpy to 1.24.4. It also is removed when making a copy of the array and multiplying the original matrix with the copy. (X.T @ X_copy)

file1.zip
file2.zip
file3.zip

Reproduce the code example:

import numpy as np 

# Loading the first file
new = np.load('file1.zip')['file1']

# concatenating the other files 
for file in ['file2', 'file3']:
    x = np.load(f'{file }.zip')[file ]
    new = np.concatenate([new, x])

# performing matrix multiplication
new.T @ new

Error message:

<input>:1: RuntimeWarning: invalid value encountered in matmul

Runtime information:

import sys, numpy; print(numpy.version); print(sys.version)
1.25.0
3.9.0 (tags/v3.9.0:9cf6752, Oct 5 2020, 15:34:40) [MSC v.1927 64 bit (AMD64)]

print(numpy.show_runtime())
[{'numpy_version': '1.25.0',
'python': '3.9.0 (tags/v3.9.0:9cf6752, Oct 5 2020, 15:34:40) [MSC v.1927 64 '
'bit (AMD64)]',
'uname': uname_result(system='Windows', node='PC04218', release='10', version='10.0.22621', machine='AMD64')},
{'simd_extensions': {'baseline': ['SSE', 'SSE2', 'SSE3'],
'found': ['SSSE3',
'SSE41',
'POPCNT',
'SSE42',
'AVX',
'F16C',
'FMA3',
'AVX2'],
'not_found': ['AVX512F',
'AVX512CD',
'AVX512_SKX',
'AVX512_CLX',
'AVX512_CNL',
'AVX512_ICL']}},
{'architecture': 'Haswell',
'filepath': 'C:\Users\hjk\dcalgo\dcalgo-deidid_q1to16_nurser_vwap\.venv\Lib\site-packages\numpy\.libs\libopenblas64__v0.3.23-gcc_10_3_0.dll',
'internal_api': 'openblas',
'num_threads': 24,
'prefix': 'libopenblas',
'threading_layer': 'pthreads',
'user_api': 'blas',
'version': '0.3.23'},
{'architecture': 'Haswell',
'filepath': 'C:\Users\hjk\dcalgo\dcalgo-deidid_q1to16_nurser_vwap\.venv\Lib\site-packages\scipy.libs\libopenblas_v0.3.20-571-g3dec11c6-gcc_10_3_0-c2315440d6b6cef5037bad648efc8c59.dll',
'internal_api': 'openblas',
'num_threads': 24,
'prefix': 'libopenblas',
'threading_layer': 'pthreads',
'user_api': 'blas',
'version': '0.3.21.dev'},
{'filepath': 'C:\Users\hjk\dcalgo\dcalgo-deidid_q1to16_nurser_vwap\.venv\Lib\site-packages\sklearn\.libs\vcomp140.dll',
'internal_api': 'openmp',
'num_threads': 24,
'prefix': 'vcomp',
'user_api': 'openmp',
'version': None}]
None

Context for the issue:

No response