Add generic_nonzero to feature list.

compiler/rustc_feature/src/unstable.rs

@@ -483,6 +483,8 @@ declare_features! (
     (incomplete, generic_const_exprs, "1.56.0", Some(76560)),
     /// Allows generic parameters and where-clauses on free & associated const items.
     (incomplete, generic_const_items, "1.73.0", Some(113521)),
+    /// Allows usage of the generic `NonZero<T>` type.
+    (unstable, generic_nonzero, "1.77.0", Some(120257)),
     /// Allows using `..=X` as a patterns in slices.
     (unstable, half_open_range_patterns_in_slices, "1.66.0", Some(67264)),
     /// Allows `if let` guard in match arms.

compiler/rustc_span/src/symbol.rs

@@ -845,6 +845,7 @@ symbols! {
         generic_associated_types_extended,
         generic_const_exprs,
         generic_const_items,
+        generic_nonzero,
         generic_param_attrs,
         get_context,
         global_allocator,

tests/ui/feature-gates/feature-gate-generic_nonzero.rs

@@ -0,0 +1,6 @@
+//@ check-pass
+#![feature(generic_nonzero)]
+
+use std::num::NonZero;
+
+fn main() {}