handle modifications to this correctly (#3036)

fixes #3032
2018-03-30 15:07:36 +09:00
parent 9f9db504d7
commit 06b9894c19
2 changed files with 25 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1052,6 +1052,7 @@ merge(Compressor.prototype, {
                        && (side_effects || node.expression.may_throw_on_access(compressor))
                    || node instanceof AST_SymbolRef
                        && (symbol_in_lvalues(node) || side_effects && may_modify(node))
+                    || node instanceof AST_This && symbol_in_lvalues(node)
                    || node instanceof AST_VarDef && node.value
                        && (node.name.name in lvalues || side_effects && may_modify(node.name))
                    || (sym = is_lhs(node.left, node))