sage -t --random-seed=47467259736041671371069989299524409608 src/sage/matrix/matrix_integer_dense_hnf.py
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File "src/sage/matrix/matrix_integer_dense_hnf.py", line 1240, in sage.matrix.matrix_integer_dense_hnf.?
Failed example:
    matrix_integer_dense_hnf.sanity_checks(times=5, check_using_magma=False)
Exception raised:
    Traceback (most recent call last):
      File "~/sage/src/sage/doctest/forker.py", line 695, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "~/sage/src/sage/doctest/forker.py", line 1093, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.matrix.matrix_integer_dense_hnf.?[1]>", line 1, in <module>
        matrix_integer_dense_hnf.sanity_checks(times=Integer(5), check_using_magma=False)
      File "~/sage/src/sage/matrix/matrix_integer_dense_hnf.py", line 1285, in sanity_checks
        __do_check([random_matrix(ZZ, n, m, x=-2**32, y=2**32)
      File "~/sage/src/sage/matrix/matrix_integer_dense_hnf.py", line 1276, in __do_check
        if hnf(a)[0] != a.echelon_form(algorithm='pari'):
      File "~/sage/src/sage/matrix/matrix_integer_dense_hnf.py", line 1106, in hnf
        H, pivots = probable_hnf(A, include_zero_rows=include_zero_rows,
      File "~/sage/src/sage/matrix/matrix_integer_dense_hnf.py", line 926, in probable_hnf
        H = hnf_square(C, proof=proof)
      File "~/sage/src/sage/matrix/matrix_integer_dense_hnf.py", line 568, in hnf_square
        raise ValueError("A must be square.")
    ValueError: A must be square.
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