1 files changed, 3 insertions, 0 deletions

diff --git a/crates/ra_mbe/src/mbe_expander.rs b/crates/ra_mbe/src/mbe_expander.rs
index af5beb786..2945e7359 100644
--- a/crates/ra_mbe/src/mbe_expander.rs
+++ b/crates/ra_mbe/src/mbe_expander.rs
@@ -13,6 +13,9 @@ pub(crate) fn exapnd(rules: &crate::MacroRules, input: &tt::Subtree) -> Option<t
 fn expand_rule(rule: &crate::Rule, input: &tt::Subtree) -> Option<tt::Subtree> {
     let mut input = TtCursor::new(input);
     let bindings = match_lhs(&rule.lhs, &mut input)?;
+    if !input.is_eof() {
+        return None;
+    }
     expand_subtree(&rule.rhs, &bindings, &mut Vec::new())
 }