Index: mozilla/netwerk/dns/src/nsIDNService.cpp
===================================================================
RCS file: /cvsroot/mozilla/netwerk/dns/src/nsIDNService.cpp,v
retrieving revision 1.18
retrieving revision 1.18.10.1
diff -u -r1.18 -r1.18.10.1
--- netwerk/dns/src/nsIDNService.cpp	3 Apr 2004 07:32:18 -0000	1.18
+++ netwerk/dns/src/nsIDNService.cpp	27 Aug 2004 11:23:21 -0000	1.18.10.1
@@ -242,6 +242,9 @@
 
 NS_IMETHODIMP nsIDNService::Normalize(const nsACString & input, nsACString & output)
 {
+  // protect against bogus input
+  NS_ENSURE_TRUE(IsUTF8(input), NS_ERROR_UNEXPECTED);
+
   nsAutoString outUTF16;
   nsresult rv = stringPrep(NS_ConvertUTF8toUTF16(input), outUTF16);
   if (NS_SUCCEEDED(rv))