Async/await run returns undefined rather than panic

boa/src/syntax/ast/node/await_expr/mod.rs

@@ -23,9 +23,10 @@ pub struct AwaitExpr {
 }
 
 impl Executable for AwaitExpr {
-    fn run(&self, interpreter: &mut Context) -> Result<Value> {
+    fn run(&self, _: &mut Context) -> Result<Value> {
         let _timer = BoaProfiler::global().start_event("AwaitExpression", "exec");
-        unimplemented!("Await expression execution");
+        // unimplemented!("Await expression execution");
+        return Ok(Value::Undefined);
     }
 }
 

boa/src/syntax/ast/node/declaration/async_function_decl/mod.rs

@@ -79,9 +79,9 @@ impl AsyncFunctionDecl {
 }
 
 impl Executable for AsyncFunctionDecl {
-    fn run(&self, interpreter: &mut Context) -> Result<Value> {
+    fn run(&self, _: &mut Context) -> Result<Value> {
         let _timer = BoaProfiler::global().start_event("AsyncFunctionDecl", "exec");
-        unimplemented!("Execute AsyncFunctionDecl");
+        // unimplemented!("Execute AsyncFunctionDecl");
         Ok(Value::undefined())
     }
 }

boa/src/syntax/ast/node/declaration/async_function_expr/mod.rs

@@ -76,8 +76,9 @@ impl AsyncFunctionExpr {
 }
 
 impl Executable for AsyncFunctionExpr {
-    fn run(&self, interpreter: &mut Context) -> Result<Value> {
-        unimplemented!("Execute AsyncFunctionExpr");
+    fn run(&self, _: &mut Context) -> Result<Value> {
+        // unimplemented!("Execute AsyncFunctionExpr");
+        return Ok(Value::Undefined);
     }
 }