Opt-in to rustc_private for rust-analyzer

rust-lang/rust-analyzer#7891

Cargo.toml

@@ -56,3 +56,7 @@ rustc_tools_util = { version = "0.2.0", path = "rustc_tools_util" }
 deny-warnings = []
 integration = ["tempfile"]
 internal-lints = ["clippy_lints/internal-lints"]
+
+[package.metadata.rust-analyzer]
+# This package uses #[feature(rustc_private)]
+rustc_private = true

clippy_lints/Cargo.toml

@@ -7,7 +7,7 @@ authors = [
 	"Manish Goregaokar <[email protected]>",
 	"Andre Bogus <[email protected]>",
 	"Georg Brandl <[email protected]>",
-	"Martin Carton <[email protected]>"
+	"Martin Carton <[email protected]>",
 ]
 description = "A bunch of helpful lints to avoid common pitfalls in Rust"
 repository = "https://github.com/rust-lang/rust-clippy"
@@ -29,14 +29,18 @@ smallvec = { version = "1", features = ["union"] }
 toml = "0.5.3"
 unicode-normalization = "0.1"
 semver = "0.11"
-rustc-semver="1.1.0"
+rustc-semver = "1.1.0"
 # NOTE: cargo requires serde feat in its url dep
 # see <https://github.com/rust-lang/rust/pull/63587#issuecomment-522343864>
-url = { version =  "2.1.0", features = ["serde"] }
+url = { version = "2.1.0", features = ["serde"] }
 quote = "1"
 syn = { version = "1", features = ["full"] }
 
 [features]
 deny-warnings = []
 # build clippy with internal lints enabled, off by default
 internal-lints = ["clippy_utils/internal-lints"]
+
+[package.metadata.rust-analyzer]
+# This crate uses #[feature(rustc_private)]
+rustc_private = true

clippy_utils/Cargo.toml

@@ -17,3 +17,7 @@ rustc-semver="1.1.0"
 
 [features]
 internal-lints = []
+
+[package.metadata.rust-analyzer]
+# This crate uses #[feature(rustc_private)]
+rustc_private = true