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-rw-r--r--src/librustc_data_structures/macros.rs5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/librustc_data_structures/macros.rs b/src/librustc_data_structures/macros.rs
index b851263aaf9..a813b5230d2 100644
--- a/src/librustc_data_structures/macros.rs
+++ b/src/librustc_data_structures/macros.rs
@@ -1,6 +1,7 @@
 /// A simple static assertion macro.
 #[macro_export]
-#[allow_internal_unstable(type_ascription, underscore_const_names)]
+#[cfg_attr(stage0, allow_internal_unstable(type_ascription, underscore_const_names))]
+#[cfg_attr(not(stage0), allow_internal_unstable(type_ascription))]
 macro_rules! static_assert {
     ($test:expr) => {
         // Use the bool to access an array such that if the bool is false, the access
@@ -12,7 +13,7 @@ macro_rules! static_assert {
 
 /// Type size assertion. The first argument is a type and the second argument is its expected size.
 #[macro_export]
-#[allow_internal_unstable(underscore_const_names)]
+#[cfg_attr(stage0, allow_internal_unstable(underscore_const_names))]
 macro_rules! static_assert_size {
     ($ty:ty, $size:expr) => {
         const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];