fix const under collapse_vars without unused (#2454)

fixes #2453
2017-11-08 02:10:46 +08:00
parent 94b19a9c46
commit dd0a36119b
2 changed files with 24 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1070,7 +1070,8 @@ merge(Compressor.prototype, {
                    candidates.push(expr);
                } else if (expr instanceof AST_Sequence) {
                    expr.expressions.forEach(extract_candidates);
-                } else if (expr instanceof AST_Definitions) {
+                } else if (expr instanceof AST_Definitions
+                    && (compressor.option("unused") || !(expr instanceof AST_Const))) {
                    expr.definitions.forEach(function(var_def) {
                        if (var_def.value) candidates.push(var_def);
                    });