X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;ds=sidebyside;f=clippy_lints%2Fsrc%2Fmissing_doc.rs;h=b99052e66ba57dc718d998a183e6f6a62d5789ad;hb=c07cbb9ea65bb4ed4c78fa4b664474ea234bbc46;hp=db6aab0671bd08d7a58a9a0a02675072d6d45c7e;hpb=fad9407c5a8e61ae3d79b1d92f8a698e9b7461a0;p=rust.git

diff --git a/clippy_lints/src/missing_doc.rs b/clippy_lints/src/missing_doc.rs
index db6aab0671b..b99052e66ba 100644
--- a/clippy_lints/src/missing_doc.rs
+++ b/clippy_lints/src/missing_doc.rs
@@ -11,7 +11,7 @@
 use rustc_ast::ast::{self, MetaItem, MetaItemKind};
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
-use rustc_middle::ty;
+use rustc_middle::ty::{self, DefIdTree};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::def_id::CRATE_DEF_ID;
 use rustc_span::source_map::Span;
@@ -131,8 +131,8 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, it: &'tcx hir::Item<'_>) {
             hir::ItemKind::Fn(..) => {
                 // ignore main()
                 if it.ident.name == sym::main {
-                    let def_key = cx.tcx.hir().def_key(it.def_id);
-                    if def_key.parent == Some(hir::def_id::CRATE_DEF_INDEX) {
+                    let at_root = cx.tcx.local_parent(it.def_id) == CRATE_DEF_ID;
+                    if at_root {
                         return;
                     }
                 }