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Diffstat (limited to 'crates/mbe/src/expander.rs')
-rw-r--r--crates/mbe/src/expander.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crates/mbe/src/expander.rs b/crates/mbe/src/expander.rs
index 60483809dc..9366048fd9 100644
--- a/crates/mbe/src/expander.rs
+++ b/crates/mbe/src/expander.rs
@@ -58,7 +58,7 @@ pub(crate) fn expand_rules<S: Span>(
ExpandResult::new(
tt::Subtree {
delimiter: tt::Delimiter::invisible_spanned(call_site),
- token_trees: vec![],
+ token_trees: Box::new([]),
},
ExpandError::NoMatchingRule,
)