feat(serde_v8): better error output (#18815)

The type that was received is now printed as part of a message.

1 files changed, 2 insertions, 1 deletions

diff --git a/serde_v8/magic/u16string.rs b/serde_v8/magic/u16string.rs
index 57e3fd0f6..04d742da9 100644
--- a/serde_v8/magic/u16string.rs
+++ b/serde_v8/magic/u16string.rs
@@ -1,5 +1,6 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
+use crate::error::value_to_type_str;
 use crate::Error;
 
 use super::transl8::impl_magic;
@@ -37,7 +38,7 @@ impl FromV8 for U16String {
     value: v8::Local<v8::Value>,
   ) -> Result<Self, crate::Error> {
     let v8str = v8::Local::<v8::String>::try_from(value)
-      .map_err(|_| Error::ExpectedString)?;
+      .map_err(|_| Error::ExpectedString(value_to_type_str(value)))?;
     let len = v8str.length();
     let mut buffer = Vec::with_capacity(len);
     #[allow(clippy::uninit_vec)]