fix reduce_vars on boolean binary expressions (#1819)

Side effects of `&&` and `||` have not mattered until #1814, which takes assignment expressions into account.
2017-04-17 17:24:29 +08:00
parent 4ffb6fce76
commit 6d5f341999
2 changed files with 31 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -340,6 +340,14 @@ merge(Compressor.prototype, {
                        });
                    }
                }
+                if (node instanceof AST_Binary
+                    && (node.operator == "&&" || node.operator == "||")) {
+                    node.left.walk(tw);
+                    push();
+                    node.right.walk(tw);
+                    pop();
+                    return true;
+                }
                if (node instanceof AST_If) {
                    node.condition.walk(tw);
                    push();