fix corner case in unsafe_math (#3677)

fixes #3676
2020-01-08 10:28:10 +08:00
parent f5ceff6e4b
commit 14c35739dd
2 changed files with 35 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6529,7 +6529,9 @@ merge(Compressor.prototype, {
                    && self.right.is_number(compressor)
                    && (self.operator != "+"
                        || self.right.left.is_boolean(compressor)
-                        || self.right.left.is_number(compressor))) {
+                        || self.right.left.is_number(compressor))
+                    && (self.right.left.is_constant_expression()
+                        || !self.right.right.has_side_effects(compressor))) {
                    self = make_node(AST_Binary, self, {
                        operator: align(self.operator, self.right.operator),
                        left: make_node(AST_Binary, self.left, {