fix catch symbol mangling (#1734)

Only need to look up the immediate non-block/catch scope for the same-name special case.

fixes #1733

1 files changed, 3 insertions, 5 deletions

diff --git a/lib/scope.js b/lib/scope.js
index 025d4ca3..df0a7e00 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -79,9 +79,7 @@ SymbolDef.prototype = {
             if (!options.screw_ie8 && sym instanceof AST_SymbolLambda)
                 s = s.parent_scope;
             var def;
-            if (options.screw_ie8
-                && sym instanceof AST_SymbolCatch
-                && (def = s.parent_scope.find_variable(sym))) {
+            if (this.defun && (def = this.defun.variables.get(this.name))) {
                 this.mangled_name = def.mangled_name || def.name;
             } else
                 this.mangled_name = s.next_mangled(options, this);
@@ -171,7 +169,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             }
         }
         else if (node instanceof AST_SymbolCatch) {
-            scope.def_variable(node);
+            scope.def_variable(node).defun = defun;
         }
         else if (node instanceof AST_LabelRef) {
             var sym = labels.get(node.name);
@@ -227,7 +225,7 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
             if (node instanceof AST_SymbolCatch) {
                 var name = node.name;
                 var refs = node.thedef.references;
-                var scope = node.thedef.scope.parent_scope;
+                var scope = node.thedef.defun;
                 var def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
                 refs.forEach(function(ref) {
                     ref.thedef = def;