From 33c94d3bd90af2ceaa3faf36cdf19c2dd8700619 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Thu, 10 Oct 2019 09:37:02 +0800
Subject: detect boolean context across IIFEs (#3461)

---
 lib/ast.js | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lib')

diff --git a/lib/ast.js b/lib/ast.js
index 6205cc77..5e1fbbb9 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -979,6 +979,14 @@ TreeWalker.prototype = {
                 || p instanceof AST_Conditional
                 || p.tail_node() === self) {
                 self = p;
+            } else if (p instanceof AST_Return) {
+                var fn;
+                do {
+                    fn = this.parent(++i);
+                    if (!fn) return false;
+                } while (!(fn instanceof AST_Lambda));
+                self = this.parent(++i);
+                if (!self || self.TYPE != "Call" || self.expression !== fn) return false;
             } else {
                 return false;
             }
-- 
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