diff options
Diffstat (limited to 'compiler/rustc_ast_passes/src/feature_gate.rs')
| -rw-r--r-- | compiler/rustc_ast_passes/src/feature_gate.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_ast_passes/src/feature_gate.rs b/compiler/rustc_ast_passes/src/feature_gate.rs index e312f15f05b..915613a3913 100644 --- a/compiler/rustc_ast_passes/src/feature_gate.rs +++ b/compiler/rustc_ast_passes/src/feature_gate.rs @@ -514,6 +514,7 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) { gate_all!(contracts_internals, "contract internal machinery is for internal use only"); gate_all!(where_clause_attrs, "attributes in `where` clause are unstable"); gate_all!(super_let, "`super let` is experimental"); + gate_all!(frontmatter, "frontmatters are experimental"); if !visitor.features.never_patterns() { if let Some(spans) = spans.get(&sym::never_patterns) { |