[master 4/5] Fix crash when user start typing proxy credentials

[dashea]

From: Jiri Konecny

ProxyString object for parsing proxy was misused.
When using proxy with username the password is need too and reverse.
---
 pyanaconda/ui/gui/spokes/source.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pyanaconda/ui/gui/spokes/source.py b/pyanaconda/ui/gui/spokes/source.py
index 8817f18..688bc7c 100644
--- a/pyanaconda/ui/gui/spokes/source.py
+++ b/pyanaconda/ui/gui/spokes/source.py
@@ -1519,7 +1519,10 @@ def on_repoProxy_changed(self, *args):
             self._repoChecks[repo.addon_repo_id].proxy_check.update_check_status()

try:
-            proxy = ProxyString(url=url, username=username, password=password)
+            if username and password:
+                proxy = ProxyString(url=url, username=username, password=password)
+            else:
+                proxy = ProxyString(url=url)
             repo.proxy = proxy.url
         except ProxyStringError as e:
             log.error("Failed to parse proxy - %s:%s@%s: %s", username, password, url, e)