Error trait in liballoc is unstable

Author: taiki-e

src/liballoc/error.rs

@@ -1,6 +1,6 @@
 //! Traits for working with Errors.
 
-#![stable(feature = "rust1", since = "1.0.0")]
+#![unstable(feature = "alloc_error", reason = "Error trait in liballoc is unstable", issue="0")]
 
 // A note about crates and the facade:
 //

src/libstd/lib.rs

@@ -229,6 +229,7 @@
 // compiler details that will never be stable
 // NB: the following list is sorted to minimize merge conflicts.
 #![feature(alloc_error_handler)]
+#![feature(alloc_error)]
 #![feature(alloc_layout_extra)]
 #![feature(allocator_api)]
 #![feature(allocator_internals)]
@@ -447,9 +448,6 @@ pub use core::hint;
 #[stable(feature = "core_array", since = "1.36.0")]
 pub use core::array;
 
-#[stable(feature = "rust1", since = "1.0.0")]
-pub use alloc_crate::error;
-
 pub mod f32;
 pub mod f64;
 
@@ -481,6 +479,14 @@ pub mod task {
 #[stable(feature = "futures_api", since = "1.36.0")]
 pub mod future;
 
+#[stable(feature = "rust1", since = "1.0.0")]
+pub mod error {
+    //! Traits for working with Errors.
+
+    #[stable(feature = "rust1", since = "1.0.0")]
+    pub use alloc_crate::error::*;
+}
+
 // Platform-abstraction modules
 #[macro_use]
 mod sys_common;