(Merge 3.4) asyncio, tulip issue 190: Process.communicate() now ignores

ConnectionResetError too

Doc/library/asyncio-subprocess.rst

@@ -191,9 +191,9 @@ Process
       process, or ``None``, if no data should be sent to the child.  The type
       of *input* must be bytes.
 
-      If a :exc:`BrokenPipeError` is raised when writing *input* into stdin,
-      the exception is ignored. It occurs when the process exits before all
-      data are written into stdin.
+      If a :exc:`BrokenPipeError` or :exc:`ConnectionResetError` exception is
+      raised when writing *input* into stdin, the exception is ignored. It
+      occurs when the process exits before all data are written into stdin.
 
       :meth:`communicate` returns a tuple ``(stdoutdata, stderrdata)``.
 
@@ -210,7 +210,8 @@ Process
       This method is a :ref:`coroutine <coroutine>`.
 
       .. versionchanged:: 3.4.2
-         The method now ignores :exc:`BrokenPipeError`.
+         The method now ignores :exc:`BrokenPipeError` and
+         :exc:`ConnectionResetError`.
 
    .. method:: kill()
 

Lib/asyncio/subprocess.py

@@ -139,17 +139,19 @@ class Process:
 
     @coroutine
     def _feed_stdin(self, input):
+        debug = self._loop.get_debug()
         self.stdin.write(input)
-        if self._loop.get_debug():
+        if debug:
             logger.debug('%r communicate: feed stdin (%s bytes)',
                         self, len(input))
         try:
             yield from self.stdin.drain()
-        except BrokenPipeError:
-            # ignore BrokenPipeError
-            pass
+        except (BrokenPipeError, ConnectionResetError) as exc:
+            # communicate() ignores BrokenPipeError and ConnectionResetError
+            if debug:
+                logger.debug('%r communicate: stdin got %r', self, exc)
 
-        if self._loop.get_debug():
+        if debug:
             logger.debug('%r communicate: close stdin', self)
         self.stdin.close()