asyncio: sync with Tulip

* PipeServer.close() now cancels the "accept pipe" future which cancels the
  overlapped operation.
* Fix _SelectorTransport.__repr__() if the transport was closed
* Fix debug log in BaseEventLoop.create_connection(): get the socket object
  from the transport because SSL transport closes the old socket and creates a
  new SSL socket object. Remove also the _SelectorSslTransport._rawsock
  attribute: it contained the closed socket (not very useful) and it was not
  used.
* Issue #22063: socket operations (sock_recv, sock_sendall, sock_connect,
  sock_accept) of the proactor event loop don't raise an exception in debug
  mode if the socket are in blocking mode. Overlapped operations also work on
  blocking sockets.
* Fix unit tests in debug mode: mock a non-blocking socket for socket
  operations which now raise an exception if the socket is blocking.
* _fatal_error() method of _UnixReadPipeTransport and _UnixWritePipeTransport
  now log all exceptions in debug mode
* Don't log expected errors in unit tests
* Tulip issue 200: _WaitHandleFuture._unregister_wait() now catchs and logs
  exceptions.
* Tulip issue 200: Log errors in debug mode instead of simply ignoring them.

1 files changed, 11 insertions, 3 deletions

diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 8d3e25e..37310cf 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -337,7 +337,10 @@ class _UnixReadPipeTransport(transports.ReadTransport):
 
     def _fatal_error(self, exc, message='Fatal error on pipe transport'):
         # should be called by exception handler only
-        if not (isinstance(exc, OSError) and exc.errno == errno.EIO):
+        if (isinstance(exc, OSError) and exc.errno == errno.EIO):
+            if self._loop.get_debug():
+                logger.debug("%r: %s", self, message, exc_info=True)
+        else:
             self._loop.call_exception_handler({
                 'message': message,
                 'exception': exc,
@@ -509,7 +512,10 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
 
     def _fatal_error(self, exc, message='Fatal error on pipe transport'):
         # should be called by exception handler only
-        if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
+        if isinstance(exc, (BrokenPipeError, ConnectionResetError)):
+            if self._loop.get_debug():
+                logger.debug("%r: %s", self, message, exc_info=True)
+        else:
             self._loop.call_exception_handler({
                 'message': message,
                 'exception': exc,
@@ -750,7 +756,9 @@ class SafeChildWatcher(BaseChildWatcher):
         except KeyError:  # pragma: no cover
             # May happen if .remove_child_handler() is called
             # after os.waitpid() returns.
-            pass
+            if self._loop.get_debug():
+                logger.warning("Child watcher got an unexpected pid: %r",
+                               pid, exc_info=True)
         else:
             callback(pid, returncode, *args)