work around CGI::Session constructor issues

The constructor can fail with a useless error message if module fail to
load. Work around this by evaling it, and checking for failures, and
printing CGI::Session->errstr to get a more useful message.

diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index 99cead64fcbbf5461820720c415f5eb91e8a58fc..52d3474f57d7cfefb2910341ea0cf96729ce756b 100644 (file)
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -645,8 +645,14 @@ sub cgi_getsession ($) { #{{{
        CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
        
        my $oldmask=umask(077);
-       my $session = CGI::Session->new("driver:DB_File", $q,
-               { FileName => "$config{wikistatedir}/sessions.db" });
+       my $session = eval {
+               CGI::Session->new("driver:DB_File", $q,
+                       { FileName => "$config{wikistatedir}/sessions.db" })
+       };
+       if (! $session || $@) {
+               error($@." ".CGI::Session->errstr());
+       }
+       
        umask($oldmask);
 
        return $session;