diff options
| -rw-r--r-- | src/librustc_lint/builtin.rs | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/src/librustc_lint/builtin.rs b/src/librustc_lint/builtin.rs index cad6a312521..201dfba91c9 100644 --- a/src/librustc_lint/builtin.rs +++ b/src/librustc_lint/builtin.rs @@ -28,8 +28,8 @@ use rustc_ast::visit::{FnCtxt, FnKind}; use rustc_ast_pretty::pprust::{self, expr_to_string}; use rustc_data_structures::fx::FxHashSet; use rustc_errors::{Applicability, DiagnosticBuilder}; -use rustc_feature::Stability; use rustc_feature::{deprecated_attributes, AttributeGate, AttributeTemplate, AttributeType}; +use rustc_feature::{GateIssue, Stability}; use rustc_hir as hir; use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::DefId; @@ -1817,13 +1817,21 @@ impl EarlyLintPass for IncompleteFeatures { .map(|(name, span, _)| (name, span)) .chain(features.declared_lib_features.iter().map(|(name, span)| (name, span))) .filter(|(name, _)| rustc_feature::INCOMPLETE_FEATURES.iter().any(|f| name == &f)) - .for_each(|(name, &span)| { + .for_each(|(&name, &span)| { cx.struct_span_lint(INCOMPLETE_FEATURES, span, |lint| { - lint.build(&format!( - "the feature `{}` is incomplete and may cause the compiler to crash", + let mut builder = lint.build(&format!( + "the feature `{}` is incomplete and may not be safe to use \ + and/or cause compiler crashes", name, - )) - .emit() + )); + if let Some(n) = rustc_feature::find_feature_issue(name, GateIssue::Language) { + builder.note(&format!( + "see issue #{} <https://github.com/rust-lang/rust/issues/{}> \ + for more information", + n, n, + )); + } + builder.emit(); }) }); } |