Merge with 3.2 for #11006.

diff --cc Misc/NEWS
index d3587ddfae21f21822526b7a7fefe196a6f4e6ff,c36b0196d21a186dbf7c7446b6daeb01ca9526f8..425eedccc1cf416474c3aaf7999578859a6875f2
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -419,9 -97,8 +419,11 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #11006: Don't issue low level warning in subprocess when pipe2() fails.
+ 
 +- Issue #13620: Support for Chrome browser in webbrowser.py Patch contributed
 +  by Arnaud Calmettes.
 +
  - Issue #11829: Fix code execution holes in inspect.getattr_static for
    metaclasses with metaclasses. Patch by Andreas Stührk.
  

diff --cc Modules/_posixsubprocess.c
Simple merge