gistfile1.txt

diff --git a/src/core/Signature.pm b/src/core/Signature.pm
index 129b4e9..0cbe262 100644
--- a/src/core/Signature.pm
+++ b/src/core/Signature.pm
@@ -138,16 +138,26 @@ my class Signature { # declared in BOOTSTRAP

 multi sub infix:<eqv>(Signature $a, Signature $b) { $a.perl eq $b.perl }
 Perl6::Metamodel::Configuration.set_multi_sig_comparator(
-    -> \a, \b { my $sa = a.signature.^find_private_method('gistperl')(
-                     a.signature, True, :where(-> $ { Nil }));
-                with $sa {
-                    my $sb = b.signature.^find_private_method('gistperl')(
-                        b.signature, True, :where(-> $ { Nil }));
-                    $sa eqv $sb;
-                }
-                else {
-                    False;
-                }
-               });
+    -> \a, \b {
+        my \sa := a.signature;
+        my \sb := b.signature;
+
+        my $rv = -1;
+        if sa.count == sb.count
+            and +sa.params == +sb.params { # same thing?
+            while ++$rv < +sa.params {
+                my \sap := sa.params;
+                my \sbp := sb.params;
+                $rv = +sa.params
+                    unless sap[$rv].invocant == sbp[$rv].invocant
+                    and sap[$rv].multi-invocant == sbp[$rv].multi-invocant
+                    and (my \pa := sap[$rv].perl(:where(-> $ { Nil }))) !=:= Nil
+                    and (my \pb := sbp[$rv].perl(:where(-> $ { Nil }))) !=:= Nil
+                    and pa eq pb;
+            }
+        }
+        $rv == +sa.params and sa.returns.perl eq sb.returns.perl;
+    }
+);