From e1259f15750b4d5b10bba776d96e21caf4dd33bc Mon Sep 17 00:00:00 2001
From: Joel Mason <jobba1@hotmail.com>
Date: Fri, 4 Nov 2016 23:31:50 +1100
Subject: [PATCH] Adds preserve to signal created by manipulate

Stops issues with manipulate signals being garbage collected when they go out of scope.
Fixes #115
---
 src/manipulate.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/manipulate.jl b/src/manipulate.jl
index 948df64..d310ac3 100644
--- a/src/manipulate.jl
+++ b/src/manipulate.jl
@@ -16,7 +16,7 @@ end
 function map_block(block, symbols)
     lambda = Expr(:(->), Expr(:tuple, symbols...),
                   block)
-    :(map($lambda, $(map(s->:(signal($s)), symbols)...), typ=Any))
+    :(preserve(map($lambda, $(map(s->:(signal($s)), symbols)...), typ=Any)))
 end
 
 function symbols(bindings)