From beae32c8ab3eeff940995a613bc4344c30b2e090 Mon Sep 17 00:00:00 2001
From: Carl Masak <cmasak@gmail.com>
Date: Sat, 22 May 2010 16:35:17 +0200
Subject: [PATCH] [GGE::Exp] s/undef/Mu/

These days, using 'undef' produces a runtime error. So we use Mu instead.
It's debatable whether it should really be Nil, though. Time will tell.
---
 lib/GGE/Exp.pm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/GGE/Exp.pm b/lib/GGE/Exp.pm
index 4389d95..2757c12 100644
--- a/lib/GGE/Exp.pm
+++ b/lib/GGE/Exp.pm
@@ -207,7 +207,7 @@ class GGE::Exp is GGE::Match {
                 local-branch('%1_cgen');
             }
             when '%1_cont' {
-                %0 = undef;
+                %0 = Mu;
                 goto('fail');
             }
             when '%1_cgen' { ]], $indexing, $label);
@@ -218,7 +218,7 @@ class GGE::Exp is GGE::Match {
                     $captback.emit('$captscope.delete(%0);', $cname);
                 }
                 else {
-                    $captback.emit('%0 = undef;', $indexing);
+                    $captback.emit('%0 = Mu;', $indexing);
                 }
             }
         }