futures = null;
        cancel(false);
      } else {
        collectValueFromNonCancelledFuture(index, future);
      }
    } finally {
      /*
       * "null" means: There is no need to access `futures` again during
       * `processCompleted` because we're reading each value during a call to
       * handleOneInputDone.
       */
      decrementCountAndMaybeComplete(null);
    }
  }

```

请求 `/unicorns/yolo` 时，路径操作会触发 `UnicornException`。

但该异常将会被 `unicorn_exception_handler` 处理。

接收到的错误信息清晰明了，HTTP 状态码为 `418`，JSON 内容如下：

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}

```

/// note | "技术细节"

`from starlette.requests import Request` 和 `from starlette.responses import JSONResponse` 也可以用于导入 `Request` 和 `JSONResponse`。

				if bucketsMap[bi.Name] >= quorum {
					resultMap[bi.Name] = bi
				}
			}
		}
		// loop through buckets and see if some with lost quorum
		// these could be stale buckets lying around, queue a heal
		// of such a bucket. This is needed here as we identify such
		// buckets here while listing buckets. As part of regular
		// globalBucketMetadataSys.Init() call would get a valid
		// buckets only and not the quourum lost ones like this, so

    )

    /** HTTP/2 only. */
    fun ackSettings()

    /**
     * Read a connection-level ping from the peer. `ack` indicates this is a reply. The data
     * in `payload1` and `payload2` opaque binary, and there are no rules on the content.
     */
    fun ping(
      ack: Boolean,
      payload1: Int,
      payload2: Int,
    )

    /**

			}
			// No other conflicting actions in this rule can apply to an object with current version as DEL marker
			// Note: There could be other rules with earlier expiration which need to be considered.
			// See TestDelMarkerExpiration
			continue
		}

		// Skip rules with newer noncurrent versions specified. These rules are
		// not handled at an individual version level. eval applies only to a
		// specific version.

   * @param maxLength the maximum number of bytes to write
   * @return the number of bytes written to {@code dest}
   * @throws IndexOutOfBoundsException if there is not enough room in {@code dest}
   */
  @CanIgnoreReturnValue
  public int writeBytesTo(byte[] dest, int offset, int maxLength) {
    maxLength = min(maxLength, bits() / 8);
    Preconditions.checkPositionIndexes(offset, offset + maxLength, dest.length);

}

// ResourceAttributes includes the authorization attributes available for resource requests to the Authorizer interface
message ResourceAttributes {
  // Namespace is the namespace of the action being requested.  Currently, there is no distinction between no namespace and all namespaces
  // "" (empty) is defaulted for LocalSubjectAccessReviews
  // "" (empty) is empty for cluster-scoped resources

}

// ResourceAttributes includes the authorization attributes available for resource requests to the Authorizer interface
message ResourceAttributes {
  // Namespace is the namespace of the action being requested.  Currently, there is no distinction between no namespace and all namespaces
  // "" (empty) is defaulted for LocalSubjectAccessReviews
  // "" (empty) is empty for cluster-scoped resources

   *
   * @param value a primitive {@code float} value
   * @return a hash code for the value
   */
  public static int hashCode(float value) {
    // TODO(kevinb): is there a better way, that's still gwt-safe?
    return ((Float) value).hashCode();
  }

  /**
   * Compares the two specified {@code float} values using {@link Float#compare(float, float)}. You

    if (expectedInsertions == 0) {
      expectedInsertions = 1;
    }
    /*
     * TODO(user): Put a warning in the javadoc about tiny fpp values, since the resulting size
     * is proportional to -log(p), but there is not much of a point after all, e.g.
     * optimalM(1000, 0.0000000000000001) = 76680 which is less than 10kb. Who cares!
     */
    long numBits = optimalNumOfBits(expectedInsertions, fpp);