fix(implicit_features): Work with any dep table

Author: Muscraft

src/cargo/util/lints.rs

@@ -192,21 +192,18 @@ pub fn check_implicit_features(
         if lint_level == LintLevel::Forbid || lint_level == LintLevel::Deny {
             *error_count += 1;
         }
+        let mut toml_path = vec![dep.kind().kind_table(), dep_name_in_toml.as_str()];
+        let platform = dep.platform().map(|p| p.to_string());
+        if let Some(platform) = platform.as_ref() {
+            toml_path.insert(0, platform);
+            toml_path.insert(0, "target");
+        }
         let level = lint_level.to_diagnostic_level();
         let manifest_path = rel_cwd_manifest_path(path, gctx);
         let message = level.title(IMPLICIT_FEATURES.desc).snippet(
             Snippet::source(manifest.contents())
                 .origin(&manifest_path)
-                .annotation(
-                    level.span(
-                        get_span(
-                            manifest.document(),
-                            &["dependencies", &dep_name_in_toml],
-                            false,
-                        )
-                        .unwrap(),
-                    ),
-                )
+                .annotation(level.span(get_span(manifest.document(), &toml_path, false).unwrap()))
                 .fold(true),
         );
         let renderer = Renderer::styled().term_width(

tests/testsuite/lints/implicit_features/edition_2021_warn/mod.rs

@@ -6,6 +6,8 @@ use cargo_test_support::{file, project};
 #[cargo_test]
 fn case() {
     Package::new("bar", "0.1.0").publish();
+    Package::new("baz", "0.1.0").publish();
+    Package::new("target-dep", "0.1.0").publish();
     let p = project()
         .file(
             "Cargo.toml",
@@ -18,6 +20,12 @@ edition = "2021"
 [dependencies]
 bar = { version = "0.1.0", optional = true }
 
+[build-dependencies]
+baz = { version = "0.1.0", optional = true }
+
+[target.'cfg(target_os = "linux")'.dependencies]
+target-dep = { version = "0.1.0", optional = true }
+
 [lints.cargo]
 implicit-features = "warn"
 "#,