Add a test for #1380

tests/source/configs-fn_call_style-block.rs

@@ -8,6 +8,14 @@ fn main() {
 
     // chain
     let x = yooooooooooooo.fooooooooooooooo.baaaaaaaaaaaaar(hello, world);
+
+    // #1380
+    {
+        {
+            let creds = self.client
+                .client_credentials(&self.config.auth.oauth2.id, &self.config.auth.oauth2.secret)?;
+        }
+    }
 }
 
 // #1521

tests/target/configs-fn_call_style-block.rs

@@ -22,6 +22,16 @@ fn main() {
         hello,
         world,
     );
+
+    // #1380
+    {
+        {
+            let creds = self.client.client_credentials(
+                &self.config.auth.oauth2.id,
+                &self.config.auth.oauth2.secret,
+            )?;
+        }
+    }
 }
 
 // #1521