Better error message for when proc-macros have not yet been built

Author: Veykril

crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs

@@ -32,7 +32,7 @@ pub(crate) fn unresolved_proc_macro(
     let severity = if config_enabled { Severity::Error } else { Severity::WeakWarning };
     let def_map = ctx.sema.db.crate_def_map(d.krate);
     let message = if config_enabled {
-        def_map.proc_macro_loading_error().unwrap_or("proc macro not found in the built dylib")
+        def_map.proc_macro_loading_error().unwrap_or("internal error")
     } else {
         match d.kind {
             hir::MacroKind::Attr if proc_macros_enabled => "attribute macro expansion is disabled",

crates/rust-analyzer/src/reload.rs

@@ -528,10 +528,16 @@ impl GlobalState {
             (crate_graph, proc_macros, crate_graph_file_dependencies)
         };
 
+        let mut change = Change::new();
         if self.config.expand_proc_macros() {
+            change.set_proc_macros(
+                crate_graph
+                    .iter()
+                    .map(|id| (id, Err("Proc-macros have not been built yet".to_owned())))
+                    .collect(),
+            );
             self.fetch_proc_macros_queue.request_op(cause, proc_macro_paths);
         }
-        let mut change = Change::new();
         change.set_crate_graph(crate_graph);
         self.analysis_host.apply_change(change);
         self.crate_graph_file_dependencies = crate_graph_file_dependencies;