Merge pull request #3159 from jxltom/continue-to-fix-3102

Continue to fix cannot concatenate str and type issue during locking

pipenv/vendor/delegator.py

@@ -112,7 +112,7 @@ def _pexpect_out(self):
         if self.subprocess.before:
             result += self.subprocess.before
 
-        if self.subprocess.after and self.subprocess.after is not pexpect.EOF:
+        if self.subprocess.after and self.subprocess.after not in (pexpect.EOF, pexpect.TIMEOUT):
             try:
                 result += self.subprocess.after
             except (pexpect.EOF, pexpect.TIMEOUT):