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-rw-r--r--compiler/rustc_resolve/src/diagnostics.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs
index 67491b5bf7e..a0d5b61e8bd 100644
--- a/compiler/rustc_resolve/src/diagnostics.rs
+++ b/compiler/rustc_resolve/src/diagnostics.rs
@@ -481,6 +481,7 @@ impl<'a> Resolver<'a> {
                         name
                     ));
                 }
+                err.help("use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions");
 
                 err
             }