BUG: pandas 1.1.3 fails to install using pip and clang due to unreachable code
- [X] I have checked that this issue has not already been reported.

- [X] I have confirmed this bug exists on the latest version of pandas.

- [ ] (optional) I have confirmed this bug exists on the master branch of pandas.

---

**Note**: Please read [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) detailing how to provide the necessary information for us to reproduce your bug.

#### Code Sample, a copy-pastable example

```python
pip3 install -U --user pandas

```

#### Problem description

The installation fails with the following output:-

```
  clang -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DNPY_NO_DEPRECATED_API=0 -I./pandas/_libs -Ipandas/_libs/src/klib -I/tmp/
pip-build-env-ikhpgen8/overlay/lib/python3.9/site-packages/numpy/core/include -I/home/chaz/.local/local/python-3.9.0/include/python3.9 -c pandas/_libs/algos.c -o build/temp.linux-x
86_64-3.9/pandas/_libs/algos.o -Werror
  pandas/_libs/algos.c:81785:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  pandas/_libs/algos.c:83402:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  pandas/_libs/algos.c:84302:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  pandas/_libs/algos.c:85202:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  pandas/_libs/algos.c:85385:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  pandas/_libs/algos.c:86285:3: error: code will never be executed [-Werror,-Wunreachable-code]
    __Pyx_SafeReleaseBuffer(&__pyx_pybuffernd_arr.rcbuffer->pybuffer);
    ^~~~~~~~~~~~~~~~~~~~~~~
  6 errors generated.
  error: command '/home/chaz/.local/local/clang+llvm/bin/clang' failed with exit code 1
  ----------------------------------------
  ERROR: Failed building wheel for pandas
```

#### Expected Output

The module should be installed successfully.

#### Output of ``pd.show_versions()``

N/A

[paste the output of ``pd.show_versions()`` here leaving a blank line after the details tag]

</details>
