1 files changed, 8 insertions, 0 deletions
diff --git a/cli/op_error.rs b/cli/op_error.rs
index 258642f8a..a687eed2b 100644
--- a/cli/op_error.rs
+++ b/cli/op_error.rs
@@ -50,6 +50,7 @@ pub enum ErrorKind {
   /// if no better context is available.
   /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
   Other = 22,
+  Busy = 23,
 }
 
 #[derive(Debug)]
@@ -103,6 +104,13 @@ impl OpError {
   pub fn invalid_utf8() -> OpError {
     Self::new(ErrorKind::InvalidData, "invalid utf8".to_string())
   }
+
+  pub fn resource_unavailable() -> OpError {
+    Self::new(
+      ErrorKind::Busy,
+      "resource is unavailable because it is in use by a promise".to_string(),
+    )
+  }
 }
 
 impl Error for OpError {}