HHVM 3.29.1 和 3.27.4 发布，Facebook 打造的 PHP 虚拟机-Linuxeden开源社区

HHVM 3.29.1 和 3.27.4 发布了，这两个版本均包含 Bugfix 和功能改进：

3.29.1

Fix reversed assignment when lambdas have multiple inout parameters
This release is available for Ubuntu 18.10 Cosmic
Significantly reduced lock contention when not running in repo-authoritative mode
Fix incorrect results for experimental HSL regex when combined with offset capture
Support building on systems where $PATH includes spaces

3.27.4

Fix reversed assignment when lambdas have multiple inout parameters
Support stream_await() on FDs when using CLI server (included in 3.29.0)
stream_await() will throw an InvalidOperationException if called on an unawaitable file descriptor. This includes actual on-disk files on Linux, as they are not supported by epoll. We recommend that callers attempt to stream_await(), and handle this exception if neccessary. The stream metadata can not be used to identify whether or not a stream is awaitable – for example, hhvm foo.php has an awaitable STDIN, but hhvm foo.php < myfile has an awaitable STDIN on MacOS (kqueue) but not on Linux (epoll). In prior releases, behavior varied; the most common result was writing an error to STDOUT, and the awaitable not resolving, with request timeout eventually being reached (included in 3.29.0)

开发团队表示，对最后一个 issue 的修复在技术上属于 BC break（破话了向后兼容性，backward compatibility），但还是将其引入了该版本中，不然项目会出现更大的问题。

转自 https://www.oschina.net/news/101364/hhvm-3-29-1-released