fix(lsp): better handling of languageId (#11755)

Fixes #11521
Fixes #11742

1 files changed, 15 insertions, 7 deletions

diff --git a/cli/lsp/language_server.rs b/cli/lsp/language_server.rs
index 9fbe6be5d..9926ac0e4 100644
--- a/cli/lsp/language_server.rs
+++ b/cli/lsp/language_server.rs
@@ -772,13 +772,21 @@ impl Inner {
       // already managed by the language service
       return;
     }
-    let language_id = match params.text_document.language_id.parse() {
-      Ok(language_id) => language_id,
-      Err(err) => {
-        error!("{}", err);
-        LanguageId::TypeScript
-      }
-    };
+    let language_id =
+      params
+        .text_document
+        .language_id
+        .parse()
+        .unwrap_or_else(|err| {
+          error!("{}", err);
+          LanguageId::Unknown
+        });
+    if language_id == LanguageId::Unknown {
+      warn!(
+        "Unsupported language id \"{}\" received for document \"{}\".",
+        params.text_document.language_id, params.text_document.uri
+      );
+    }
     let media_type = MediaType::from(&language_id);
     self.documents.open(
       specifier.clone(),