--- tor-0.1.0.15/src/common/compat.c.setgroups	2005-06-09 06:12:12.000000000 +0200
+++ tor-0.1.0.15/src/common/compat.c	2005-12-10 12:22:34.000000000 +0100
@@ -432,6 +432,11 @@
       return -1;
     }
 
+    if (getgroups(0,0)!=0 && setgroups(0,0)!=0) {
+      log_fn(LOG_ERR,"Error setting groups: %s", strerror(errno));
+      return -1;
+    }
+
     if (setgid(gr->gr_gid) != 0) {
       log_fn(LOG_ERR,"Error setting GID: %s", strerror(errno));
       return -1;