detect boolean context across IIFEs (#3461)

1 files changed, 8 insertions, 0 deletions

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;
             }