retain recursive function names (#2667)

fixes #2665

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/compress.js b/lib/compress.js
index 4a2a436b..c8cddc37 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4700,9 +4700,14 @@ merge(Compressor.prototype, {
                 if (d.recursive_refs > 0 && fixed.name instanceof AST_SymbolDefun) {
                     value = fixed.clone(true);
                     var defun_def = value.name.definition();
-                    value.name = make_node(AST_SymbolLambda, value.name, value.name);
-                    value.name.scope = value;
-                    var lambda_def = value.def_function(value.name);
+                    var lambda_def = value.variables.get(value.name.name);
+                    var name = lambda_def && lambda_def.orig[0];
+                    if (!(name instanceof AST_SymbolLambda)) {
+                        name = make_node(AST_SymbolLambda, value.name, value.name);
+                        name.scope = value;
+                        value.name = name;
+                        lambda_def = value.def_function(name);
+                    }
                     value.walk(new TreeWalker(function(node) {
                         if (node instanceof AST_SymbolRef && node.definition() === defun_def) {
                             node.thedef = lambda_def;