Fix mapped arguments

boa-dev · Sep 25, 2023 · c336acd · c336acd
1 parent 57b6e5a
commit c336acd
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/boa_engine/src/bytecompiler/declarations.rs b/boa_engine/src/bytecompiler/declarations.rs
@@ -1037,13 +1037,18 @@ impl ByteCompiler<'_, '_> {
             }
             match parameter.variable().binding() {
                 Binding::Identifier(ident) => {
+                    let function_environment_index =
+                        arguments_object_needed.then(|| self.function_environment_index.take());
                     self.create_mutable_binding(*ident, false);
                     if let Some(init) = parameter.variable().init() {
                         let skip = self.emit_opcode_with_operand(Opcode::JumpIfNotUndefined);
                         self.compile_expr(init, true);
                         self.patch_jump(skip);
                     }
                     self.emit_binding(BindingOpcode::InitLet, *ident);
+                    if let Some(function_environment_index) = function_environment_index {
+                        self.function_environment_index = function_environment_index;
+                    }
                 }
                 Binding::Pattern(pattern) => {
                     for ident in bound_names(pattern) {