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-rw-r--r--library/alloc/src/lib.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/library/alloc/src/lib.rs b/library/alloc/src/lib.rs
index ca75c3895..e9cc3875f 100644
--- a/library/alloc/src/lib.rs
+++ b/library/alloc/src/lib.rs
@@ -87,6 +87,7 @@
#![warn(missing_debug_implementations)]
#![warn(missing_docs)]
#![allow(explicit_outlives_requirements)]
+#![cfg_attr(not(bootstrap), warn(multiple_supertrait_upcastable))]
//
// Library features:
#![feature(alloc_layout_extra)]
@@ -115,7 +116,6 @@
#![feature(const_eval_select)]
#![feature(const_pin)]
#![feature(const_waker)]
-#![feature(cstr_from_bytes_until_nul)]
#![feature(dispatch_from_dyn)]
#![feature(error_generic_member_access)]
#![feature(error_in_core)]
@@ -195,6 +195,7 @@
#![feature(c_unwind)]
#![feature(with_negative_coherence)]
#![cfg_attr(test, feature(panic_update_hook))]
+#![cfg_attr(not(bootstrap), feature(multiple_supertrait_upcastable))]
//
// Rustdoc features:
#![feature(doc_cfg)]