Misc asyncio improvements from upstream

5 files changed, 16 insertions, 22 deletions

diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index 03935ea94b..af66c0a5b6 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -115,24 +115,16 @@ def _ipaddr_info(host, port, family, type, proto):
 
     if port is None:
         port = 0
-    elif isinstance(port, bytes):
-        if port == b'':
-            port = 0
-        else:
-            try:
-                port = int(port)
-            except ValueError:
-                # Might be a service name like b"http".
-                port = socket.getservbyname(port.decode('ascii'))
-    elif isinstance(port, str):
-        if port == '':
-            port = 0
-        else:
-            try:
-                port = int(port)
-            except ValueError:
-                # Might be a service name like "http".
-                port = socket.getservbyname(port)
+    elif isinstance(port, bytes) and port == b'':
+        port = 0
+    elif isinstance(port, str) and port == '':
+        port = 0
+    else:
+        # If port's a service name like "http", don't skip getaddrinfo.
+        try:
+            port = int(port)
+        except (TypeError, ValueError):
+            return None
 
     if family == socket.AF_UNSPEC:
         afs = [socket.AF_INET, socket.AF_INET6]
diff --git a/Lib/asyncio/base_subprocess.py b/Lib/asyncio/base_subprocess.py
index bcc481d20e..23742a169a 100644
--- a/Lib/asyncio/base_subprocess.py
+++ b/Lib/asyncio/base_subprocess.py
@@ -3,7 +3,6 @@ import subprocess
 import warnings
 
 from . import compat
-from . import futures
 from . import protocols
 from . import transports
 from .coroutines import coroutine
diff --git a/Lib/asyncio/coroutines.py b/Lib/asyncio/coroutines.py
index e013d64edf..5cecc762df 100644
--- a/Lib/asyncio/coroutines.py
+++ b/Lib/asyncio/coroutines.py
@@ -120,8 +120,8 @@ class CoroWrapper:
         def send(self, value):
             return self.gen.send(value)
 
-    def throw(self, exc):
-        return self.gen.throw(exc)
+    def throw(self, type, value=None, traceback=None):
+        return self.gen.throw(type, value, traceback)
 
     def close(self):
         return self.gen.close()
diff --git a/Lib/asyncio/queues.py b/Lib/asyncio/queues.py
index c453f02d8c..2d38972c0d 100644
--- a/Lib/asyncio/queues.py
+++ b/Lib/asyncio/queues.py
@@ -7,7 +7,6 @@ import heapq
 
 from . import compat
 from . import events
-from . import futures
 from . import locks
 from .coroutines import coroutine
 
diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index 4c66546428..f735b44dc0 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -594,6 +594,10 @@ def gather(*coros_or_futures, loop=None, return_exceptions=False):
     """Return a future aggregating results from the given coroutines
     or futures.
 
+    Coroutines will be wrapped in a future and scheduled in the event
+    loop. They will not necessarily be scheduled in the same order as
+    passed in.
+
     All futures must share the same event loop.  If all the tasks are
     done successfully, the returned future's result is the list of
     results (in the order of the original sequence, not necessarily