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-rw-r--r--compiler/rustc_serialize/Cargo.toml1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_serialize/Cargo.toml b/compiler/rustc_serialize/Cargo.toml
index dbc5c1519..3b0b3144f 100644
--- a/compiler/rustc_serialize/Cargo.toml
+++ b/compiler/rustc_serialize/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
[dependencies]
indexmap = "1.9.1"
smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
+thin-vec = "0.2.8"
[dev-dependencies]
rustc_macros = { path = "../rustc_macros" }