fix corner case in evaluate (#5363)

fixes #5362
2022-02-20 13:38:04 +00:00
parent fbc5ecf75a
commit 212ce4608e
2 changed files with 41 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -10799,8 +10799,11 @@ Compressor.prototype.compress = function(node) {
        }
        switch (op) {
          case "+":
-            if (compressor.option("evaluate") && exp.is_number(compressor, true)) return exp;
-            break;
+            if (!compressor.option("evaluate")) break;
+            if (!exp.is_number(compressor, true)) break;
+            var parent = compressor.parent();
+            if (parent instanceof AST_UnaryPrefix && parent.operator == "delete") break;
+            return exp;
          case "-":
            if (exp instanceof AST_Infinity) exp = exp.transform(compressor);
            // avoids infinite recursion of numerals