improve diagnostics on top_retain & mangle.properties (#5622)

closes #5618
2022-08-18 19:32:21 +01:00
parent ac002b6338
commit 4653e8aec0
7 changed files with 100 additions and 8 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6841,6 +6841,7 @@ Compressor.prototype.compress = function(node) {
        if (self instanceof AST_Toplevel && compressor.top_retain) {
            self.variables.each(function(def) {
                if (compressor.top_retain(def) && !(def.id in in_use_ids)) {
+                    AST_Node.info("Retaining variable {name}", def);
                    in_use_ids[def.id] = true;
                    in_use.push(def);
                }