Hoist functions when reversing if (x) return; ... vs. if (!x) ...

Fixes #1052

1 files changed, 27 insertions, 0 deletions

diff --git a/test/compress/issue-1052.js b/test/compress/issue-1052.js
new file mode 100644
index 00000000..067eea4a
--- /dev/null
+++ b/test/compress/issue-1052.js
@@ -0,0 +1,27 @@
+hoist_funs_when_handling_if_return_rerversal: {
+    options = { if_return: true, hoist_funs: false };
+    input: {
+        "use strict";
+
+        ( function() {
+            if ( !window ) {
+                return;
+            }
+
+            function f() {}
+            function g() {}
+        } )();
+    }
+    expect: {
+        "use strict";
+
+        ( function() {
+            function f() {}
+            function g() {}
+
+            // NOTE: other compression steps will reduce this
+            // down to just `window`.
+            if ( window );
+        } )();
+    }
+}