Handle the case of on group being finite and the other inifite explic…

…itly
gap-system · Mar 8, 2019 · 4ed2f65 · 4ed2f65
1 parent 4b06361
commit 4ed2f65
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/morpheus.gi b/lib/morpheus.gi
@@ -2154,6 +2154,9 @@ local m;
   if not IsFinite(G) and not IsFinite(H) then
     Error("cannot test isomorphism of infinite groups");
   fi;
+  if IsFinite(G) <> IsFinite(H) then
+    return fail;
+  fi;
 
   #AH: Spezielle Methoden ?
   if Size(G)=1 then