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-rw-r--r--compiler/rustc_macros/src/lib.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_macros/src/lib.rs b/compiler/rustc_macros/src/lib.rs
index 36bda3e0f..ac916bb60 100644
--- a/compiler/rustc_macros/src/lib.rs
+++ b/compiler/rustc_macros/src/lib.rs
@@ -1,4 +1,5 @@
#![feature(allow_internal_unstable)]
+#![feature(if_let_guard)]
#![feature(never_type)]
#![feature(proc_macro_diagnostic)]
#![feature(proc_macro_span)]
@@ -47,7 +48,7 @@ pub fn symbols(input: TokenStream) -> TokenStream {
/// `u32::MAX`. You can also customize things like the `Debug` impl,
/// what traits are derived, and so forth via the macro.
#[proc_macro]
-#[allow_internal_unstable(step_trait, rustc_attrs, trusted_step)]
+#[allow_internal_unstable(step_trait, rustc_attrs, trusted_step, spec_option_partial_eq)]
pub fn newtype_index(input: TokenStream) -> TokenStream {
newtype::newtype(input)
}