Auto merge of #17943 - Veykril:diags, r=Veykril

fix: Improve proc-macro panic message and workspace loading failure diagnostic

Cargo.toml

@@ -19,9 +19,10 @@ rowan.opt-level = 3
 rustc-hash.opt-level = 3
 smol_str.opt-level = 3
 text-size.opt-level = 3
+serde.opt-level = 3
+salsa.opt-level = 3
 # This speeds up `cargo xtask dist`.
 miniz_oxide.opt-level = 3
-salsa.opt-level = 3
 
 [profile.release]
 incremental = true

crates/hir-expand/src/lib.rs

@@ -192,7 +192,7 @@ impl ExpandErrorKind {
                 ("overflow expanding the original macro".to_owned(), true)
             }
             ExpandErrorKind::Other(e) => ((**e).to_owned(), true),
-            ExpandErrorKind::ProcMacroPanic(e) => ((**e).to_owned(), true),
+            ExpandErrorKind::ProcMacroPanic(e) => (format!("proc-macro panicked: {e}"), true),
         }
     }
 }

crates/rust-analyzer/src/reload.rs

@@ -188,7 +188,7 @@ impl GlobalState {
                     status.health |= lsp_ext::Health::Warning;
                     format_to!(
                         message,
-                        "Workspace `{}` has been queried without dependencies, connecting to crates.io might have failed.\n\n",
+                        "Failed to read Cargo metadata for `{}`, the `Cargo.toml` might be invalid or you have no internet connection.\n\n",
                         ws.manifest_or_root()
                     );
                 }