From be829d3cc0868f1b48209441336263ba9a8fab85 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Tue, 8 Feb 2022 17:18:31 +0000
Subject: [PATCH] fix event-bus:subscribe

seems to be a Fennel bug:
<andreyorst> the problem is that tset is taken out of the or and nil is placed in place of it, thus making side effect occur
<andreyorst> even though it shouldn't
<andreyorst> telent: good catch
---
 just/just.fnl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/just/just.fnl b/just/just.fnl
index fc0fd49..2ede2e1 100644
--- a/just/just.fnl
+++ b/just/just.fnl
@@ -21,7 +21,7 @@
 (fn event-bus []
   (let [subscriptions {}
         vivify (fn [n v]
-                 (or (. n v) (tset n v {}))
+                 (tset n v (or (. n v) []))
                  (. n v))]
     {
      :subscriptions subscriptions