fix corner case in join_vars (#5176)

fixes #5175
2021-11-15 13:35:54 +00:00
parent 2d0f8bcff5
commit 77f7ae5ba2
2 changed files with 24 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3500,7 +3500,7 @@ merge(Compressor.prototype, {
            var exprs = extract_exprs(body);
            if (!exprs) return;
            var trimmed = false;
-            for (var i = exprs.length; --i >= 0;) {
+            for (var i = exprs.length - (keep || 0); --i >= 0;) {
                var expr = exprs[i];
                if (!can_trim(expr)) continue;
                var tail;