From f97143d9511c148c5f37412cdfca73e1edb88957 Mon Sep 17 00:00:00 2001
From: Urgau <urgau@numericable.fr>
Date: Fri, 10 Apr 2026 20:04:37 +0200
Subject: [PATCH] Use a linting node closer the parsing of `#[cfg_attr]`

---
 .../rustc_attr_parsing/src/attributes/cfg.rs     |  8 +++++---
 compiler/rustc_expand/src/config.rs              |  9 ++++++---
 tests/ui/check-cfg/allow-mod-level.rs            | 16 ++++++++++++++++
 3 files changed, 27 insertions(+), 6 deletions(-)
 create mode 100644 tests/ui/check-cfg/allow-mod-level.rs

diff --git a/compiler/rustc_attr_parsing/src/attributes/cfg.rs b/compiler/rustc_attr_parsing/src/attributes/cfg.rs
index ccc4a1a64c56f..91b71b851ae9e 100644
--- a/compiler/rustc_attr_parsing/src/attributes/cfg.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/cfg.rs
@@ -2,7 +2,7 @@ use std::convert::identity;
 
 use rustc_ast::token::Delimiter;
 use rustc_ast::tokenstream::DelimSpan;
-use rustc_ast::{AttrItem, Attribute, CRATE_NODE_ID, LitKind, ast, token};
+use rustc_ast::{AttrItem, Attribute, LitKind, ast, token};
 use rustc_errors::{Applicability, PResult, msg};
 use rustc_feature::{
     AttrSuggestionStyle, AttributeTemplate, Features, GatedCfg, find_gated_cfg, template,
@@ -324,12 +324,13 @@ pub fn parse_cfg_attr(
     cfg_attr: &Attribute,
     sess: &Session,
     features: Option<&Features>,
+    lint_node_id: ast::NodeId,
 ) -> Option<(CfgEntry, Vec<(AttrItem, Span)>)> {
     match cfg_attr.get_normal_item().args.unparsed_ref().unwrap() {
         ast::AttrArgs::Delimited(ast::DelimArgs { dspan, delim, tokens }) if !tokens.is_empty() => {
             check_cfg_attr_bad_delim(&sess.psess, *dspan, *delim);
             match parse_in(&sess.psess, tokens.clone(), "`cfg_attr` input", |p| {
-                parse_cfg_attr_internal(p, sess, features, cfg_attr)
+                parse_cfg_attr_internal(p, sess, features, lint_node_id, cfg_attr)
             }) {
                 Ok(r) => return Some(r),
                 Err(e) => {
@@ -390,6 +391,7 @@ fn parse_cfg_attr_internal<'a>(
     parser: &mut Parser<'a>,
     sess: &'a Session,
     features: Option<&Features>,
+    lint_node_id: ast::NodeId,
     attribute: &Attribute,
 ) -> PResult<'a, (CfgEntry, Vec<(ast::AttrItem, Span)>)> {
     // Parse cfg predicate
@@ -410,7 +412,7 @@ fn parse_cfg_attr_internal<'a>(
         Some(attribute.get_normal_item().unsafety),
         ParsedDescription::Attribute,
         pred_span,
-        CRATE_NODE_ID,
+        lint_node_id,
         Target::Crate,
         features,
         ShouldEmit::ErrorsAndLints { recovery: Recovery::Allowed },
diff --git a/compiler/rustc_expand/src/config.rs b/compiler/rustc_expand/src/config.rs
index ec5951e50e3a8..8bc1af32ffc73 100644
--- a/compiler/rustc_expand/src/config.rs
+++ b/compiler/rustc_expand/src/config.rs
@@ -283,9 +283,12 @@ impl<'a> StripUnconfigured<'a> {
         trace_attr.replace_args(AttrItemKind::Parsed(EarlyParsedAttribute::CfgAttrTrace));
         let trace_attr = attr_into_trace(trace_attr, sym::cfg_attr_trace);
 
-        let Some((cfg_predicate, expanded_attrs)) =
-            rustc_attr_parsing::parse_cfg_attr(cfg_attr, &self.sess, self.features)
-        else {
+        let Some((cfg_predicate, expanded_attrs)) = rustc_attr_parsing::parse_cfg_attr(
+            cfg_attr,
+            &self.sess,
+            self.features,
+            self.lint_node_id,
+        ) else {
             return vec![trace_attr];
         };
 
diff --git a/tests/ui/check-cfg/allow-mod-level.rs b/tests/ui/check-cfg/allow-mod-level.rs
new file mode 100644
index 0000000000000..02610d3b1f025
--- /dev/null
+++ b/tests/ui/check-cfg/allow-mod-level.rs
@@ -0,0 +1,16 @@
+// This test check that a module-level `#![allow(unexpected_cfgs)]` works
+//
+// Related to https://github.com/rust-lang/rust/issues/155118
+//
+//@ check-pass
+//@ no-auto-check-cfg
+//@ compile-flags: --check-cfg=cfg()
+
+mod my_mod {
+    #![allow(unexpected_cfgs)]
+
+    #[cfg_attr(asan, sanitize(address = "off"))]
+    static MY_ITEM: () = ();
+}
+
+fn main() {}