diff -r 1754722ec296 Lib/subprocess.py
--- a/Lib/subprocess.py	Sun Jan 22 14:39:20 2017 +0800
+++ b/Lib/subprocess.py	Sun Jan 22 10:22:15 2017 -0800
@@ -1329,7 +1329,8 @@
 
         def _handle_exitstatus(self, sts, _WIFSIGNALED=os.WIFSIGNALED,
                 _WTERMSIG=os.WTERMSIG, _WIFEXITED=os.WIFEXITED,
-                _WEXITSTATUS=os.WEXITSTATUS):
+                _WEXITSTATUS=os.WEXITSTATUS, _WIFSTOPPED=os.WIFSTOPPED,
+                _WSTOPSIG=os.WSTOPSIG):
             """All callers to this function MUST hold self._waitpid_lock."""
             # This method is called (indirectly) by __del__, so it cannot
             # refer to anything outside of its local scope.
@@ -1337,6 +1338,8 @@
                 self.returncode = -_WTERMSIG(sts)
             elif _WIFEXITED(sts):
                 self.returncode = _WEXITSTATUS(sts)
+            elif _WIFSTOPPED(sts):
+                self.returncode = -_WSTOPSIG(sts)
             else:
                 # Should never happen
                 raise SubprocessError("Unknown child exit status!")