Better error message for bad filename CLI argument.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/errors.rs b/src/errors.rs
index 74502acc5..3a6937495 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -180,6 +180,7 @@ pub fn permission_denied() -> DenoError {
   )
 }
 
+#[derive(Debug)]
 pub enum RustOrJsError {
   Rust(DenoError),
   Js(JSError),
@@ -196,3 +197,12 @@ impl From<JSError> for RustOrJsError {
     RustOrJsError::Js(e)
   }
 }
+
+impl fmt::Display for RustOrJsError {
+  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+    match self {
+      RustOrJsError::Rust(e) => e.fmt(f),
+      RustOrJsError::Js(e) => e.fmt(f),
+    }
+  }
+}