// with. If the stream identifier field specifies the value
		// 0x0, a recipient MUST respond with a connection error
		// (Section 5.4.1) of type PROTOCOL_ERROR.
		countError("frame_pushpromise_zero_stream")
		return nil, http2ConnectionError(http2ErrCodeProtocol)
	}
	// The PUSH_PROMISE frame includes optional padding.
	// Padding fields and flags are identical to those defined for DATA frames