From debf04556bcf7b156d9a5e94311e2c03185e6cea Mon Sep 17 00:00:00 2001
From: Matthew Hodgson <matthew@matrix.org>
Date: Fri, 4 May 2018 01:15:15 +0100
Subject: [PATCH] fix user in user regexp

---
 synapse/rest/client/v2_alpha/register.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index 36676c9fa8..31554e7879 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -405,7 +405,7 @@ class RegisterRestServlet(RestServlet):
                             break
                         except SynapseError as e:
                             if e.errcode == Codes.USER_IN_USE:
-                                m = re.match(r'^(.*)(\d+)$', desired_username)
+                                m = re.match(r'^(.*?)(\d+)$', desired_username)
                                 if m:
                                     desired_username = m.group(1) + str(
                                         int(m.group(2)) + 1