4 files changed, 31 insertions, 28 deletions

diff --git a/crates/ra_analysis/src/completion/reference_completion.rs b/crates/ra_analysis/src/completion/reference_completion.rs
index 8ea7478a8..f483ed045 100644
--- a/crates/ra_analysis/src/completion/reference_completion.rs
+++ b/crates/ra_analysis/src/completion/reference_completion.rs
@@ -163,7 +163,7 @@ fn complete_path(
     };
     let target_module = match def_id.resolve(db)? {
         Def::Module(it) => it,
-        Def::Item => return Ok(()),
+        _ => return Ok(()),
     };
     let module_scope = target_module.scope(db)?;
     let completions = module_scope.entries().map(|(name, _res)| CompletionItem {
diff --git a/crates/ra_analysis/src/db.rs b/crates/ra_analysis/src/db.rs
index df2ef293d..b8d774eb5 100644
--- a/crates/ra_analysis/src/db.rs
+++ b/crates/ra_analysis/src/db.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 use salsa::{self, Database};
 use ra_db::{LocationIntener, BaseDatabase};
-use hir::{self, DefId, DefLoc, FnId, SourceItemId};
+use hir::{self, DefId, DefLoc};
 
 use crate::{
     symbol_index,
@@ -15,7 +15,6 @@ pub(crate) struct RootDatabase {
 
 #[derive(Debug, Default)]
 struct IdMaps {
-    fns: LocationIntener<SourceItemId, FnId>,
     defs: LocationIntener<DefLoc, DefId>,
 }
 
@@ -58,12 +57,6 @@ impl AsRef<LocationIntener<DefLoc, DefId>> for RootDatabase {
     }
 }
 
-impl AsRef<LocationIntener<hir::SourceItemId, FnId>> for RootDatabase {
-    fn as_ref(&self) -> &LocationIntener<hir::SourceItemId, FnId> {
-        &self.id_maps.fns
-    }
-}
-
 salsa::database_storage! {
     pub(crate) struct RootDatabaseStorage for RootDatabase {
         impl ra_db::FilesDatabase {
diff --git a/crates/ra_analysis/src/imp.rs b/crates/ra_analysis/src/imp.rs
index f5cb3550e..fe1dfefea 100644
--- a/crates/ra_analysis/src/imp.rs
+++ b/crates/ra_analysis/src/imp.rs
@@ -190,10 +190,7 @@ impl AnalysisImpl {
             Some(it) => it,
         };
         let root = descr.crate_root();
-        let file_id = root
-            .source()
-            .as_file()
-            .expect("root module always has a file as a source");
+        let file_id = root.source().file_id();
 
         let crate_graph = self.db.crate_graph();
         let crate_id = crate_graph.crate_id_for_crate_root(file_id);
@@ -213,7 +210,7 @@ impl AnalysisImpl {
         let syntax = file.syntax();
         if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
             if let Some(fn_descr) =
-                hir::Function::guess_for_name_ref(&*self.db, position.file_id, name_ref)
+                hir::Function::guess_for_name_ref(&*self.db, position.file_id, name_ref)?
             {
                 let scope = fn_descr.scope(&*self.db);
                 // First try to resolve the symbol locally
@@ -260,11 +257,11 @@ impl AnalysisImpl {
         Ok(vec![])
     }
 
-    pub fn find_all_refs(&self, position: FilePosition) -> Vec<(FileId, TextRange)> {
+    pub fn find_all_refs(&self, position: FilePosition) -> Cancelable<Vec<(FileId, TextRange)>> {
         let file = self.db.source_file(position.file_id);
         // Find the binding associated with the offset
-        let (binding, descr) = match find_binding(&self.db, &file, position) {
-            None => return Vec::new(),
+        let (binding, descr) = match find_binding(&self.db, &file, position)? {
+            None => return Ok(Vec::new()),
             Some(it) => it,
         };
 
@@ -277,25 +274,36 @@ impl AnalysisImpl {
                 .map(|ref_desc| (position.file_id, ref_desc.range)),
         );
 
-        return ret;
+        return Ok(ret);
 
         fn find_binding<'a>(
             db: &db::RootDatabase,
             source_file: &'a SourceFileNode,
             position: FilePosition,
-        ) -> Option<(ast::BindPat<'a>, hir::Function)> {
+        ) -> Cancelable<Option<(ast::BindPat<'a>, hir::Function)>> {
             let syntax = source_file.syntax();
             if let Some(binding) = find_node_at_offset::<ast::BindPat>(syntax, position.offset) {
-                let descr = hir::Function::guess_for_bind_pat(db, position.file_id, binding)?;
-                return Some((binding, descr));
+                let descr = ctry!(hir::Function::guess_for_bind_pat(
+                    db,
+                    position.file_id,
+                    binding
+                )?);
+                return Ok(Some((binding, descr)));
             };
-            let name_ref = find_node_at_offset::<ast::NameRef>(syntax, position.offset)?;
-            let descr = hir::Function::guess_for_name_ref(db, position.file_id, name_ref)?;
+            let name_ref = ctry!(find_node_at_offset::<ast::NameRef>(syntax, position.offset));
+            let descr = ctry!(hir::Function::guess_for_name_ref(
+                db,
+                position.file_id,
+                name_ref
+            )?);
             let scope = descr.scope(db);
-            let resolved = scope.resolve_local_name(name_ref)?;
+            let resolved = ctry!(scope.resolve_local_name(name_ref));
             let resolved = resolved.ptr().resolve(source_file);
-            let binding = find_node_at_offset::<ast::BindPat>(syntax, resolved.range().end())?;
-            Some((binding, descr))
+            let binding = ctry!(find_node_at_offset::<ast::BindPat>(
+                syntax,
+                resolved.range().end()
+            ));
+            Ok(Some((binding, descr)))
         }
     }
 
@@ -411,7 +419,9 @@ impl AnalysisImpl {
             if fs.kind == FN_DEF {
                 let fn_file = self.db.source_file(fn_file_id);
                 if let Some(fn_def) = find_node_at_offset(fn_file.syntax(), fs.node_range.start()) {
-                    let descr = hir::Function::guess_from_source(&*self.db, fn_file_id, fn_def);
+                    let descr = ctry!(hir::Function::guess_from_source(
+                        &*self.db, fn_file_id, fn_def
+                    )?);
                     if let Some(descriptor) = descr.signature_info(&*self.db) {
                         // If we have a calling expression let's find which argument we are on
                         let mut current_parameter = None;
diff --git a/crates/ra_analysis/src/lib.rs b/crates/ra_analysis/src/lib.rs
index 12df580ba..90528edfd 100644
--- a/crates/ra_analysis/src/lib.rs
+++ b/crates/ra_analysis/src/lib.rs
@@ -248,7 +248,7 @@ impl Analysis {
         self.imp.approximately_resolve_symbol(position)
     }
     pub fn find_all_refs(&self, position: FilePosition) -> Cancelable<Vec<(FileId, TextRange)>> {
-        Ok(self.imp.find_all_refs(position))
+        self.imp.find_all_refs(position)
     }
     pub fn doc_comment_for(
         &self,