diff options
| -rw-r--r-- | compiler/rustc_ast_passes/src/feature_gate.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_passes/src/stability.rs | 10 |
2 files changed, 16 insertions, 0 deletions
diff --git a/compiler/rustc_ast_passes/src/feature_gate.rs b/compiler/rustc_ast_passes/src/feature_gate.rs index 30bc4edd7e6..06e9d9ed329 100644 --- a/compiler/rustc_ast_passes/src/feature_gate.rs +++ b/compiler/rustc_ast_passes/src/feature_gate.rs @@ -702,10 +702,16 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session) { } fn maybe_stage_features(sess: &Session, krate: &ast::Crate) { + // checks if `#![feature]` has been used to enable any lang feature + // does not check the same for lib features unless there's at least one + // declared lang feature use rustc_errors::Applicability; if !sess.opts.unstable_features.is_nightly_build() { let lang_features = &sess.features_untracked().declared_lang_features; + if lang_features.len() == 0 { + return; + } for attr in krate.attrs.iter().filter(|attr| attr.has_name(sym::feature)) { let mut err = struct_span_err!( sess.parse_sess.span_diagnostic, diff --git a/compiler/rustc_passes/src/stability.rs b/compiler/rustc_passes/src/stability.rs index b7e43b7785d..d7c354aeb49 100644 --- a/compiler/rustc_passes/src/stability.rs +++ b/compiler/rustc_passes/src/stability.rs @@ -929,6 +929,16 @@ pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) { let declared_lib_features = &tcx.features().declared_lib_features; let mut remaining_lib_features = FxHashMap::default(); for (feature, span) in declared_lib_features { + if !tcx.sess.opts.unstable_features.is_nightly_build() { + struct_span_err!( + tcx.sess, + *span, + E0554, + "`#![feature]` may not be used on the {} release channel", + env!("CFG_RELEASE_CHANNEL") + ) + .emit(); + } if remaining_lib_features.contains_key(&feature) { // Warn if the user enables a lib feature multiple times. duplicate_feature_err(tcx.sess, *span, *feature); |