maintain order between side-effects and externally observable assignments (#2879)

fixes #2878
2018-02-04 03:58:49 +08:00
parent 7e13c0db40
commit 78a44d5ab0
2 changed files with 34 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1040,7 +1040,6 @@ merge(Compressor.prototype, {
                    || node instanceof AST_PropAccess
                        && (side_effects || node.expression.may_throw_on_access(compressor))
                    || node instanceof AST_SymbolRef
-                        && !(parent instanceof AST_Assign && parent.operator == "=" && parent.left === node)
                        && (lvalues[node.name] || side_effects && may_modify(node))
                    || node instanceof AST_VarDef && node.value
                        && (node.name.name in lvalues || side_effects && may_modify(node.name))