cs_type.diff

diff --git a/ycmd/completers/cs/cs_completer.py b/ycmd/completers/cs/cs_completer.py
index 43ad87f3..13703e3b 100644
--- a/ycmd/completers/cs/cs_completer.py
+++ b/ycmd/completers/cs/cs_completer.py
@@ -589,6 +589,8 @@ class CsharpSolutionCompleter:
     result = self._GetResponse( '/typelookup', request )
     message = result[ "Type" ]

+    if not message:
+      raise RuntimeError( 'No type info found.' )
     return responses.BuildDisplayMessageResponse( message )


@@ -689,6 +691,8 @@ class CsharpSolutionCompleter:
     if ( result[ "Documentation" ] ):
       message += "\n" + result[ "Documentation" ]

+    if not message:
+      raise RuntimeError( 'No documentation found.' )
     return responses.BuildDetailedInfoResponse( message )