diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index d52f9a45f39..0fff36fa5d6 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -1412,11 +1412,10 @@ class Popen(object):
                     exception_name, hex_errno, err_msg = (
                             errpipe_data.split(b':', 2))
                 except ValueError:
-                    warnings.warn(RuntimeWarning(
-                            'Bad exception data: %r' % errpipe_data))
                     exception_name = b'SubprocessError'
                     hex_errno = b'0'
-                    err_msg = b'Unknown'
+                    err_msg = (b'Bad exception data from child: ' +
+                               repr(errpipe_data))
                 child_exception_type = getattr(
                         builtins, exception_name.decode('ascii'),
                         SubprocessError)
diff --git a/Misc/NEWS b/Misc/NEWS
index 30e32173683..ba474d8d2bb 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -116,6 +116,9 @@ Core and Builtins
 Library
 -------
 
+- Remove a bare print to stdout from the subprocess module that could have
+  happened if the child process wrote garbage to its pre-exec error pipe.
+
 - The subprocess module now raises its own SubprocessError instead of a
   RuntimeError in various error situations which should not normally happen.