From 5a3d5ca3e1cb1a29ec7b978f73b4a1f4b90166cb Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 13 Jun 2017 11:21:23 +0200
Subject: [PATCH] bpo-28180: Fix test_capi.test_forced_io_encoding()

Don't run Python in an empty environment, but copy the current
environment and set PYTHONIOENCODING. So the test works also on
Python compiled in shared mode (using libpython).
---
 Lib/test/test_capi.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index c4a97664290949..1cf5cd73f09391 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -480,7 +480,7 @@ def test_subinterps_distinct_state(self):
 
     def test_forced_io_encoding(self):
         # Checks forced configuration of embedded interpreter IO streams
-        env = {"PYTHONIOENCODING": "utf-8:surrogateescape"}
+        env = dict(os.environ, PYTHONIOENCODING="utf-8:surrogateescape")
         out, err = self.run_embedded_interpreter("forced_io_encoding", env=env)
         if support.verbose > 1:
             print()