Describe the issue:

When trying to index and array of type StringDType with an array of any unsigned integer type it fails returning a MemoryError (strangely):

MemoryError: Failed to load string in StringDType getitem
MemoryError: String deallocation failed in clear loop

It does work when the index array is cast to int.

Reproduce the code example:

import numpy as np
str_arr = np.array(["a" * 25], dtype=np.dtypes.StringDType())
idx = np.array([0], dtype=np.uint8)
print(str_arr[idx.astype(int)])
print(str_arr[idx])

Error message:

Traceback (most recent call last):
  File "test.py", line 10, in <module>
    print(str_arr[idx])
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 1692, in _array_str_implementation
    return array2string(a, max_line_width, precision, suppress_small, ' ', "")
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 776, in array2string
    return _array2string(a, options, separator, prefix)
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 547, in wrapper
    return f(self, *args, **kwargs)
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 580, in _array2string
    lst = _formatArray(a, format_function, options['linewidth'],
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 935, in _formatArray
    return recurser(index=(),
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 896, in recurser
    word = recurser(index + (-1,), next_hanging_indent, next_width)
  File "lib/python3.10/site-packages/numpy/_core/arrayprint.py", line 839, in recurser
    return format_function(a[index])
MemoryError: Failed to load string in StringDType getitem
MemoryError: String deallocation failed in clear loop

Python and NumPy Versions:

Python: 3.10.6
Numpy: 2.1.3

Runtime Environment:

[{'numpy_version': '2.1.3',
'python': '3.10.6 | packaged by conda-forge | (main, Aug 22 2022, 20:36:39) '
'[GCC 10.4.0]',
'uname': uname_result(system='Linux', node='...', release='5.15.133.1-microsoft-standard-WSL2', version='#1 SMP Thu Oct 5 21:02:42 UTC 2023', machine='x86_64')},
{'simd_extensions': {'baseline': ['SSE', 'SSE2', 'SSE3'],
'found': ['SSSE3',
'SSE41',
'POPCNT',
'SSE42',
'AVX',
'F16C',
'FMA3',
'AVX2',
'AVX512F',
'AVX512CD',
'AVX512_SKX',
'AVX512_CLX',
'AVX512_CNL',
'AVX512_ICL'],
'not_found': ['AVX512_KNL', 'AVX512_KNM']}},
{'architecture': 'SkylakeX',
'filepath': 'lib/python3.10/site-packages/numpy.libs/libscipy_openblas64_-ff651d7f.so',
'internal_api': 'openblas',
'num_threads': 16,
'prefix': 'libscipy_openblas',
'threading_layer': 'pthreads',
'user_api': 'blas',
'version': '0.3.27'}]

Context for the issue:

No response