From 924a9667e16fc64483e264a3ea35915982ffcb41 Mon Sep 17 00:00:00 2001
From: "Erik M. Bray" <embray@stsci.edu>
Date: Thu, 24 Dec 2015 14:56:57 -0500
Subject: [PATCH] Make sure readline has been imported before duping any stdio
 handles--otherwise pyreadline fails to connect to the correct handle for the
 console's stdout/in.

---
 _pytest/capture.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/_pytest/capture.py b/_pytest/capture.py
index f0fa72f46..478d475f1 100644
--- a/_pytest/capture.py
+++ b/_pytest/capture.py
@@ -308,6 +308,14 @@ class FDCapture:
     """ Capture IO to/from a given os-level filedescriptor. """
 
     def __init__(self, targetfd, tmpfile=None):
+        # ensure readline is imported so that it attaches to the correct
+        # stdio handles on Windows
+        if targetfd in (0, 1, 2):
+            try:
+                import readline
+            except ImportError:
+                pass
+
         self.targetfd = targetfd
         try:
             self.targetfd_save = os.dup(self.targetfd)