fix corner cases in assignments, reduce_vars & unused (#3950)

fixes #3949 fixes #3951
2020-06-04 21:06:43 +01:00
parent a489f8cb5e
commit 04fd3d90f8
9 changed files with 317 additions and 75 deletions
--- a/test/compress/side_effects.js
+++ b/test/compress/side_effects.js
@@ -97,9 +97,8 @@ issue_2233_2: {
        var RegExp;
        UndeclaredGlobal;
        function foo() {
-            var Number;
            AnotherUndeclaredGlobal;
-            Number.isNaN;
+            (void 0).isNaN;
        }
    }
 }