diff --git a/kclvm/api/Cargo.toml b/kclvm/api/Cargo.toml
index fb9c980fe..8d53c50a3 100644
--- a/kclvm/api/Cargo.toml
+++ b/kclvm/api/Cargo.toml
@@ -45,3 +45,6 @@ criterion = "0.4.0"
 protoc-bin-vendored = "3.0.0"
 prost-build = "0.11.8"
 prost-wkt-build = {path = "../third-party/prost-wkt/wkt-build", version = "0.4.1"}
+
+[features]
+llvm = ["kclvm-runner/llvm"]
diff --git a/kclvm/api/src/service/capi.rs b/kclvm/api/src/service/capi.rs
index ff5e76f5a..381ad1ca5 100644
--- a/kclvm/api/src/service/capi.rs
+++ b/kclvm/api/src/service/capi.rs
@@ -49,7 +49,7 @@ macro_rules! call {
             let res = serv_ref.$serv_name(&args);
             let result_byte = match res {
                 Ok(res) => res.encode_to_vec(),
-                Err(err) => panic!("{}", err),
+                Err(err) => format!("ERROR:{}", err.to_string()).into_bytes(),
             };
             *$result_len = result_byte.len();
             CString::from_vec_unchecked(result_byte).into_raw()