HHVM 4.134 is released! HHVM 4.129–4.133 remain supported, as do the 4.102 and 4.128 LTS releases.


  • ext_curl will now cache TLS certificates between requests if HHVM is built against Curl v7.46.0 or newer.
  • added HH\Lib\Ref::get() and ::set($value) - direct property access is still supported.
  • Added HH\Lib\Async\Poll::waitUntilEmptyAsync() for convenience and clarity when only the side effects of the Awaitables are needed, such as when running an event loop.

Breaking Changes

  • It is now an unfixmeable parse error to attempt to write to object properties in a pure function.