extend collapse_vars to let and const (#2252)

fixes #2250
2017-07-25 22:07:21 +08:00
parent 69861824b5
commit d3df2f985d
4 changed files with 71 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -302,6 +302,7 @@ merge(Compressor.prototype, {
            if (reduce_vars) {
                if (node instanceof AST_Toplevel) node.globals.each(reset_def);
                if (node instanceof AST_Scope) node.variables.each(reset_def);
+                if (node.block_scope) node.block_scope.variables.each(reset_def);
                if (node instanceof AST_SymbolRef) {
                    var d = node.definition();
                    d.references.push(node);