• setup.py can be run from a directory containing spaces. Reported
  in :issue:319 by Ivan Smirnov.
• setup.py can build with newer versions of clang on OS X. They
  enforce the distinction between CFLAGS and CPPFLAGS.
• gevent.lock.Semaphore is atomic on PyPy, just like it is on
  CPython. This comes at a small performance cost.
• Fixed regression that failed to set the successful value to
  False when killing a greenlet before it ran with a non-default
  exception. Fixed in :pr:608 by Heungsub Lee.
• libev's child watchers caused os.waitpid to become unreliable
  due to the use of signals on POSIX platforms. This was especially
  noticeable when using gevent.subprocess in combination with
  multiprocessing. Now, the monkey-patched os module provides
  a waitpid function that seeks to ameliorate this. Reported in
  :issue:600 by champax and :issue:452 by Łukasz Kawczyński.
• On platforms that implement select.poll, provide a
  gevent-friendly gevent.select.poll and corresponding
  monkey-patch. Implemented in :pr:604 by Eddi Linder.
• Allow passing of events to the io callback under PyPy. Reported in
  :issue:531 by M. Nunberg and implemented in :pr:604.
• gevent.thread.allocate_lock (and so a monkey-patched standard
  library allocate_lock) more closely matches the behaviour of the
  builtin: an unlocked lock cannot be released, and attempting to do
  so throws the correct exception (thread.error on Python 2,
  RuntimeError on Python 3). Previously, over-releasing a lock was
  silently ignored. Reported in :issue:308 by Jędrzej Nowak.
• gevent.fileobject.FileObjectThread uses the threadpool to close
  the underling file-like object. Reported in :issue:201 by
  vitaly-krugl.
• Malicious or malformed HTTP chunked transfer encoding data sent to
  the gevent.pywsgi handler is handled more robustly, resulting in
  "HTTP 400 bad request" responses instead of a 500 error or, in the
  worst case, a server-side hang. Reported in :issue:229 by Björn
  Lindqvist.
• Importing the standard library threading module before using
  gevent.monkey.patch_all() no longer causes Python 3.4 to fail to
  get the repr of the main thread, and other CPython platforms to
  return an unjoinable DummyThread. (Note that this is not
  recommended.) Reported in :issue:153.
• Under Python 2, use the io package to implement
  FileObjectPosix. This unifies the code with the Python 3
  implementation, and fixes problems with using seek(). See
  :issue:151.
• Under Python 2, importing a module that uses gevent blocking
  functions at its top level from multiple greenlets no longer
  produces import errors (Python 3 handles this case natively).
  Reported in :issue:108 by shaun and initial fix based on code by
  Sylvain Zimmer.
• gevent.spawn, spawn_raw and spawn_later, as well as the
  Greenlet constructor, immediately produce useful TypeErrors
  if asked to run something that cannot be run. Previously, the
  spawned greenlet would die with an uncaught TypeError the first
  time it was switched to. Reported in :issue:119 by stephan.
• Recursive use of gevent.threadpool.ThreadPool.apply no longer
  raises a LoopExit error (using ThreadPool.spawn and then
  get on the result still could; you must be careful to use the
  correct hub). Reported in :issue:131 by 8mayday.
• When the threading module is monkey-patched, the module-level
  lock in the logging module is made greenlet-aware, as are the
  instance locks of any configured handlers. This makes it safer to
  import modules that use the standard pattern of creating a
  module-level Logger instance before monkey-patching. Configuring
  logging with a basic configuration and then monkey-patching is
  also safer (but not configurations that involve such things as the
  SocketHandler).
• Fix monkey-patching of threading.RLock under Python 3.
• Under Python 3, monkey-patching at the top-level of a module that
  was imported by another module could result in a RuntimeError
  from importlib. Reported in :issue:615 by Daniel Mizyrycki.
  (The same thing could happen under Python 2 if a threading.RLock
  was held around the monkey-patching call; this is less likely but
  not impossible with import hooks.)
• Fix configuring c-ares for a 32-bit Python when running on a 64-bit
  platform. Reported in :issue:381 and fixed in :pr:616 by Chris
  Lane.
• (Experimental) Let the pywsgi.WSGIServer accept a
  logging.Logger instance for its log and (new) error_log
  parameters. Take care that the system is fully monkey-patched very
  early in the process's lifetime if attempting this, and note that
  non-file handlers have not been tested. Fixes :issue:106.