fix corner case in merge_vars (#4455)

fixes #4454
2020-12-25 11:27:05 +00:00
parent bb45f48ab7
commit f345175bc2
2 changed files with 57 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -5187,7 +5187,7 @@ merge(Compressor.prototype, {
            } else if ((ldef = self.variables.get(def.name)) !== def) {
                if (ldef && root === segment) references[ldef.id] = false;
                return references[def.id] = false;
-            } else if (compressor.exposed(def) || sym.name == "arguments") {
+            } else if (compressor.exposed(def) || sym.name == "arguments" || sym.name == "await") {
                return references[def.id] = false;
            } else {
                var refs = declarations.get(def.id) || [];