Printing inside a loop prints garbage on parallel=True

[AvyChanna]

reproducing the issue

import numba as nb

def main():
	for i in nb.prange(1000000):
		print(i)

nb.jit(main, parallel=True)()

Without parallel, it correctly prints 1000000 lines. If I num-sort the output, I correctly get a list from 0 to n.

On adding parallel=True, it prints some garbage along with the numbers. (sometimes even omits a newline and concatenates 2 lines). This happens for nopython=True, parallel=True as well.

# flags: parallel=True
# PS C:\Users\xxxxxxxx\Desktop\workspace> python .\test.py | wc
#   1000000 1000000 7888890

# flags: <none>
# PS C:\Users\xxxxxxxx\Desktop\workspace> python .\test.py | wc
#   994614  994445 7888994

Sys info

# sys.version_info = sys.version_info(major=3, minor=12, micro=2, releaselevel='final', serial=0)
# sys.version      = '3.12.2 (tags/v3.12.2:6abddd9, Feb  6 2024, 21:26:36) [MSC v.1937 64 bit (AMD64)]'
# nb.version_info  = version_info(major=0, minor=59, patch=1, short=(0, 59), full=(0, 59, 1), string='0.59.1', tuple=('0', '59', '1'), git_revision=None)

Output:
test_parallel.log

[esc]

could it be that print is not thread-safe?

[github-actions]

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