Work around napi-rs crash when cloning an error

napi-rs/napi-rs#1640

Author: devongovett

node/src/lib.rs

@@ -372,7 +372,7 @@ mod bundle {
         0,
         move |ctx: ThreadSafeCallContext<VisitMessage>| {
           if let Err(err) = ctx.value.stylesheet.visit(&mut visitor) {
-            ctx.value.tx.send(Err(err.clone())).expect("send error");
+            ctx.value.tx.send(Err(err)).expect("send error");
             return Ok(());
           }
           ctx.value.tx.send(Ok(Default::default())).expect("send error");

node/test/bundle.test.mjs

@@ -373,4 +373,22 @@ test('should throw with location info on syntax errors', async () => {
   });
 });
 
+test('should support throwing in visitors', async () => {
+  let error = undefined;
+  try {
+    await bundleAsync({
+      filename: 'tests/testdata/a.css',
+      visitor: {
+        Rule() {
+          throw new Error('Some error')
+        }
+      }
+    });
+  } catch (err) {
+    error = err;
+  }
+
+  assert.equal(error.message, 'Some error');
+});
+
 test.run();