Bug 237774: The text "bug 0" auto-linkifies to "<missing bug number>" - Patch by Nick Barnes <nb+bz@ravenbrook.com> r=LpSolit a=myk

webtools/bugzilla/globals.pl

@@ -894,8 +894,11 @@ sub GetAttachmentLink {
 
 sub GetBugLink {
     my ($bug_num, $link_text, $comment_num) = @_;
-    $bug_num || return "<missing bug number>";
-    detaint_natural($bug_num) || return "<invalid bug number>";
+    if (! defined $bug_num || $bug_num eq "") {
+        return "<missing bug number>";
+    }
+    my $quote_bug_num = html_quote($bug_num);
+    detaint_natural($bug_num) || return "<invalid bug number: $quote_bug_num>";
 
     # If we've run GetBugLink() for this bug number before, %::buglink
     # will contain an anonymous array ref of relevent values, if not