fix: don't panic if the client sends invalid request

crates/rust-analyzer/src/from_proto.rs

@@ -10,7 +10,7 @@ use crate::{
     from_json,
     global_state::GlobalStateSnapshot,
     line_index::{LineIndex, OffsetEncoding},
-    lsp_ext, Result,
+    lsp_ext, LspError, Result,
 };
 
 pub(crate) fn abs_path(url: &lsp_types::Url) -> Result<AbsPathBuf> {
@@ -85,7 +85,10 @@ pub(crate) fn annotation(
     snap: &GlobalStateSnapshot,
     code_lens: lsp_types::CodeLens,
 ) -> Result<Annotation> {
-    let data = code_lens.data.unwrap();
+    let data = code_lens.data.ok_or_else(|| LspError {
+        code: lsp_server::ErrorCode::InvalidParams as i32,
+        message: "code lens without data".to_string(),
+    });
     let resolve = from_json::<lsp_ext::CodeLensResolveData>("CodeLensResolveData", data)?;
 
     match resolve {