Auto merge of #14221 - epage:implicit, r=weihanglo

fix: Ensure dep/feature activates the dependency on 2024

### What does this PR try to resolve?

Fixes #14016

### How should we test and review this PR?

This doesn't revert the last commit of #14018 so that it works properly
on Editions 2021 and 2024.

### Additional information

Author: bors

src/cargo/util/toml/mod.rs

@@ -291,7 +291,7 @@ fn resolve_toml(
         dev_dependencies2: None,
         build_dependencies: None,
         build_dependencies2: None,
-        features: original_toml.features.clone(),
+        features: None,
         target: None,
         replace: original_toml.replace.clone(),
         patch: original_toml.patch.clone(),
@@ -322,6 +322,8 @@ fn resolve_toml(
             });
         resolved_toml.package = Some(resolved_package);
 
+        resolved_toml.features = resolve_features(original_toml.features.as_ref(), edition)?;
+
         resolved_toml.lib = targets::resolve_lib(
             original_toml.lib.as_ref(),
             package_root,
@@ -686,6 +688,40 @@ fn default_readme_from_package_root(package_root: &Path) -> Option<String> {
     None
 }
 
+#[tracing::instrument(skip_all)]
+fn resolve_features(
+    original_features: Option<&BTreeMap<manifest::FeatureName, Vec<String>>>,
+    edition: Edition,
+) -> CargoResult<Option<BTreeMap<manifest::FeatureName, Vec<String>>>> {
+    let Some(mut resolved_features) = original_features.cloned() else {
+        return Ok(None);
+    };
+
+    if Edition::Edition2024 <= edition {
+        for activations in resolved_features.values_mut() {
+            let mut deps = Vec::new();
+            for feature_value in activations.iter() {
+                let feature_value = FeatureValue::new(InternedString::new(feature_value));
+                let FeatureValue::DepFeature {
+                    dep_name,
+                    dep_feature: _,
+                    weak: false,
+                } = feature_value
+                else {
+                    continue;
+                };
+                let dep = FeatureValue::Dep { dep_name }.to_string();
+                if !activations.contains(&dep) {
+                    deps.push(dep);
+                }
+            }
+            activations.extend(deps);
+        }
+    }
+
+    Ok(Some(resolved_features))
+}
+
 #[tracing::instrument(skip_all)]
 fn resolve_dependencies<'a>(
     gctx: &GlobalContext,

tests/testsuite/features.rs

@@ -1847,6 +1847,73 @@ fn features_option_given_twice() {
     p.cargo("check --features a --features b").run();
 }
 
+#[cargo_test(nightly, reason = "edition2024 is not stable")]
+fn strong_dep_feature_edition2024() {
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                cargo-features = ["edition2024"]
+                [package]
+                name = "foo"
+                version = "0.1.0"
+                edition = "2024"
+
+                [features]
+                optional_dep = ["optional_dep/foo"]
+
+                [dependencies]
+                optional_dep = { path = "optional_dep", optional = true }
+            "#,
+        )
+        .file(
+            "src/main.rs",
+            r#"
+               fn main() {}
+            "#,
+        )
+        .file(
+            "optional_dep/Cargo.toml",
+            r#"
+            [package]
+            name = "optional_dep"
+            [features]
+            foo = []
+"#,
+        )
+        .file(
+            "optional_dep/src/lib.rs",
+            r#"
+"#,
+        )
+        .build();
+
+    p.cargo("metadata")
+        .masquerade_as_nightly_cargo(&["edition2024"])
+        .with_stdout_data(
+            str![[r#"
+{
+  "metadata": null,
+  "packages": [
+    {
+      "features": {
+        "optional_dep": [
+          "optional_dep/foo",
+          "dep:optional_dep"
+        ]
+      },
+      "name": "foo",
+      "...": "{...}"
+    }
+  ],
+  "...": "{...}"
+}
+"#]]
+            .json(),
+        )
+        .run();
+}
+
 #[cargo_test]
 fn multi_multi_features() {
     let p = project()