`NullPointerException: bio == null`.


## Version 4.9.0

_2020-09-11_

**With this release, `okhttp-tls` no longer depends on Bouncy Castle and doesn't install the
Bouncy Castle security provider.** If you still need it, you can do it yourself:

```
Security.addProvider(BouncyCastleProvider())
```

You will also need to configure this dependency:

```

    assertThat(connect.headers["Host"]).isEqualTo("[::1]:$port")
    assertThat(connect.headers[":authority"]).isNull()
    val get = server.takeRequest()
    assertThat(get.requestLine).isEqualTo("GET / HTTP/1.1")
    assertThat(get.headers["Host"]).isEqualTo("[::1]:$port")
    assertThat(get.headers[":authority"]).isNull()
    assertThat(get.requestUrl).isEqualTo(url)
  }

  @Test
  fun ipv6HostHasSquareBracesHttp2() {

import android.content.Context
import androidx.test.core.app.ApplicationProvider
import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import java.net.InetAddress
import java.net.UnknownHostException
import okhttp3.Cache
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request
import okio.Path.Companion.toPath

 * limitations under the License.
 */
package okhttp3.internal.cache2

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isNull
import assertk.assertions.isTrue
import java.io.File
import java.io.IOException
import java.util.concurrent.Callable
import java.util.concurrent.Executors
import kotlin.test.assertFailsWith

import assertk.assertions.containsExactly
import assertk.assertions.containsExactlyInAnyOrder
import assertk.assertions.hasMessage
import assertk.assertions.isEqualTo
import assertk.assertions.isInstanceOf
import assertk.assertions.isNull
import java.io.EOFException
import java.io.File
import java.io.IOException
import java.net.InetAddress
import java.net.UnknownHostException
import java.util.concurrent.TimeUnit
import mockwebserver3.MockResponse

import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isInstanceOf
import assertk.assertions.isLessThan
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import java.io.EOFException
import java.io.IOException
import java.io.InterruptedIOException
import java.net.HttpURLConnection
import java.net.ProtocolException
import java.net.SocketTimeoutException

        uses: actions/setup-java@v4
        with:
          distribution: 'zulu'
          java-version: 17

      - uses: actions/setup-python@v5
        with:
          python-version: 3.x

      - run: pip install mkdocs-material mkdocs-redirects

      - name: Generate Docs
        run: ./test_docs.sh

      - uses: actions/upload-artifact@v4
        with:
          name: docs

import assertk.assertions.contains
import assertk.assertions.hasMessage
import assertk.assertions.isCloseTo
import assertk.assertions.isEqualTo
import assertk.assertions.isFalse
import assertk.assertions.isNull
import assertk.assertions.isTrue
import assertk.fail
import java.io.IOException
import java.net.HttpURLConnection
import java.net.SocketTimeoutException
import java.time.Duration
import java.util.Arrays

  fun sleep(durationNanos: Long) {
    taskRunner.lock.withLock {
      val sleepUntil = nanoTime + durationNanos
      yieldUntil { nanoTime >= sleepUntil }
    }
  }

  /**
   * Artificially stall until manually resumed by the test thread with [runTasks]. Use this to
   * simulate races in tasks that doesn't have a deterministic sequence.
   */
  fun yield() {
    taskRunner.assertThreadDoesntHoldLock()

    taskFaker.runNextTask()

    // Don't allow edits under any circumstances.
    assertThat(cache.edit("a")).isNull()
    assertThat(cache.edit("c")).isNull()
    cache["a"]!!.use {
      assertThat(it.edit()).isNull()
    }
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)