--- a/mercurial/error.py	Sun Apr 16 11:28:02 2017 -0700
+++ b/mercurial/error.py	Sun Apr 16 11:12:37 2017 -0700
@@ -253,5 +253,5 @@
 class CorruptedState(Exception):
     """error raised when a command is not able to read its state from file"""
 
-class RichIOError(Abort):
-    """An IOError that can also have a hint attached."""
+class PeerTransportError(Abort):
+    """Transport-level I/O error when communicating with a peer repo."""