From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 30 Jun 2018 21:49:23 +0000 (+0100)
Subject: dep.js (value): Force the dep before registering a dependents.
X-Git-Url: https://git.distorted.org.uk/~mdw/dep-ui/commitdiff_plain/f2059c0fd232dfec5064d6df1cf787cce50fbcb2

dep.js (value): Force the dep before registering a dependents.

Otherwise we'll add the dependent to the list, and then `_propagate'
will clear the list, forgetting about us.
---

diff --git a/dep.js b/dep.js
index d21f94a..ec09e83 100644
--- a/dep.js
+++ b/dep.js
@@ -395,11 +395,11 @@ Dep.prototype = {
     var val;
 
     if (STATE === 'recomputing') {
+      this._force();
       if (EVALUATING) {
 	this._dependents[EVALUATING._seq] = EVALUATING;
 	EVALUATING._dependencies[this._seq] = this;
       }
-      this._force();
     }
     val = this._value;
     if (val === BAD) throw BAD;