2 files changed, 23 insertions, 4 deletions

diff --git a/crates/ra_mbe/src/subtree_source.rs b/crates/ra_mbe/src/subtree_source.rs
index dacca8279..91e324db9 100644
--- a/crates/ra_mbe/src/subtree_source.rs
+++ b/crates/ra_mbe/src/subtree_source.rs
@@ -1,7 +1,7 @@
 //! FIXME: write short doc here
 
 use ra_parser::{Token, TokenSource};
-use ra_syntax::{lex_single_valid_syntax_kind, SmolStr, SyntaxKind, SyntaxKind::*, T};
+use ra_syntax::{lex_single_syntax_kind, SmolStr, SyntaxKind, SyntaxKind::*, T};
 use std::cell::{Cell, Ref, RefCell};
 use tt::buffer::{Cursor, TokenBuffer};
 
@@ -129,7 +129,8 @@ fn convert_delim(d: Option<tt::DelimiterKind>, closing: bool) -> TtToken {
 }
 
 fn convert_literal(l: &tt::Literal) -> TtToken {
-    let kind = lex_single_valid_syntax_kind(&l.text)
+    let kind = lex_single_syntax_kind(&l.text)
+        .map(|(kind, _error)| kind)
         .filter(|kind| kind.is_literal())
         .unwrap_or_else(|| match l.text.as_ref() {
             "true" => T![true],
diff --git a/crates/ra_mbe/src/tests.rs b/crates/ra_mbe/src/tests.rs
index e0d689704..cb228702f 100644
--- a/crates/ra_mbe/src/tests.rs
+++ b/crates/ra_mbe/src/tests.rs
@@ -1374,14 +1374,22 @@ pub(crate) struct MacroFixture {
 
 impl MacroFixture {
     pub(crate) fn expand_tt(&self, invocation: &str) -> tt::Subtree {
-        let source_file = ast::SourceFile::parse(invocation).ok().unwrap();
+        self.try_expand_tt(invocation).unwrap()
+    }
+
+    fn try_expand_tt(&self, invocation: &str) -> Result<tt::Subtree, ExpandError> {
+        let source_file = ast::SourceFile::parse(invocation).tree();
         let macro_invocation =
             source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
 
         let (invocation_tt, _) =
             ast_to_token_tree(&macro_invocation.token_tree().unwrap()).unwrap();
 
-        self.rules.expand(&invocation_tt).unwrap()
+        self.rules.expand(&invocation_tt)
+    }
+
+    fn assert_expand_err(&self, invocation: &str, err: &ExpandError) {
+        assert_eq!(self.try_expand_tt(invocation).as_ref(), Err(err));
     }
 
     fn expand_items(&self, invocation: &str) -> SyntaxNode {
@@ -1539,3 +1547,13 @@ fn test_repeat_bad_var() {
     )
     .assert_expand_items("foo!(b0 b1);", "b0 b1");
 }
+
+#[test]
+fn test_expand_bad_literal() {
+    parse_macro(
+        r#"
+        macro_rules! foo { ($i:literal) => {}; }
+    "#,
+    )
+    .assert_expand_err(r#"foo!(&k");"#, &ExpandError::NoMatchingRule);
+}