docstr: test for indptr overflow when concatenating matrices 
docstr_tok: ["test","for","indptr","overflow","when","concatenating","matrices"]
code: def test_concatenate_int32_overflow(self):
      """test for indptr overflow when concatenating matrices"""
      check_free_memory(30000)
  
      n = 33000
      A = csr_array(np.ones((n, n), dtype=bool))
      B = A.copy()
      C = construct._compressed_sparse_stack(
          (A, B), axis=0, return_spmatrix=False
      )
  
      assert_(np.all(np.equal(np.diff(C.indptr), n)))
      assert_equal(C.indices.dtype, np.int64)
      assert_equal(C.indptr.dtype, np.int64)
  
imports: import numpy
  from numpy import array
  from numpy.testing import assert_equal, assert_, assert_array_equal, assert_array_almost_equal_nulp
  import pytest
  from pytest import raises
  from scipy._lib._testutils import check_free_memory
  from scipy._lib._util import check_random_state
  from scipy.sparse import csr_matrix, coo_matrix, csr_array, coo_array, sparray, spmatrix, _construct
  from scipy.sparse._construct import rand
label_desc: Use image node_id 24 for calling the TestConstructUtils obj's underlying member method code with example usage: obj.test_concatenate_int32_overflow() without return types