Auto merge of #112117 - bryangarza:track-caller-feature-gate, r=compiler-errors

Add separate feature gate for async fn track caller

This patch adds a feature gate `async_fn_track_caller` that is separate from `closure_track_caller`. This is to allow enabling `async_fn_track_caller` separately.

Fixes #110009

compiler/rustc_ast_lowering/src/expr.rs

@@ -657,14 +657,14 @@ pub(super) fn make_async_expr(
     }
 
     /// Forwards a possible `#[track_caller]` annotation from `outer_hir_id` to
-    /// `inner_hir_id` in case the `closure_track_caller` feature is enabled.
+    /// `inner_hir_id` in case the `async_fn_track_caller` feature is enabled.
     pub(super) fn maybe_forward_track_caller(
         &mut self,
         span: Span,
         outer_hir_id: hir::HirId,
         inner_hir_id: hir::HirId,
     ) {
-        if self.tcx.features().closure_track_caller
+        if self.tcx.features().async_fn_track_caller
             && let Some(attrs) = self.attrs.get(&outer_hir_id.local_id)
             && attrs.into_iter().any(|attr| attr.has_name(sym::track_caller))
         {

compiler/rustc_ast_lowering/src/item.rs

@@ -56,6 +56,11 @@ fn with_lctx(
         owner: NodeId,
         f: impl FnOnce(&mut LoweringContext<'_, 'hir>) -> hir::OwnerNode<'hir>,
     ) {
+        let allow_gen_future = Some(if self.tcx.features().async_fn_track_caller {
+            [sym::gen_future, sym::closure_track_caller][..].into()
+        } else {
+            [sym::gen_future][..].into()
+        });
         let mut lctx = LoweringContext {
             // Pseudo-globals.
             tcx: self.tcx,
@@ -83,7 +88,7 @@ fn with_lctx(
             impl_trait_defs: Vec::new(),
             impl_trait_bounds: Vec::new(),
             allow_try_trait: Some([sym::try_trait_v2, sym::yeet_desugar_details][..].into()),
-            allow_gen_future: Some([sym::gen_future, sym::closure_track_caller][..].into()),
+            allow_gen_future,
             generics_def_id_map: Default::default(),
         };
         lctx.with_hir_id_owner(owner, |lctx| f(lctx));

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -215,14 +215,19 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
             }
             sym::thread_local => codegen_fn_attrs.flags |= CodegenFnAttrFlags::THREAD_LOCAL,
             sym::track_caller => {
-                if !tcx.is_closure(did.to_def_id())
+                let is_closure = tcx.is_closure(did.to_def_id());
+
+                if !is_closure
                     && let Some(fn_sig) = fn_sig()
                     && fn_sig.skip_binder().abi() != abi::Abi::Rust
                 {
                     struct_span_err!(tcx.sess, attr.span, E0737, "`#[track_caller]` requires Rust ABI")
                         .emit();
                 }
-                if tcx.is_closure(did.to_def_id()) && !tcx.features().closure_track_caller {
+                if is_closure
+                    && !tcx.features().closure_track_caller
+                    && !attr.span.allows_unstable(sym::closure_track_caller)
+                {
                     feature_err(
                         &tcx.sess.parse_sess,
                         sym::closure_track_caller,

compiler/rustc_feature/src/active.rs

@@ -339,6 +339,8 @@ pub fn set(&self, features: &mut Features, span: Span) {
     (active, async_closure, "1.37.0", Some(62290), None),
     /// Allows async functions to be declared, implemented, and used in traits.
     (active, async_fn_in_trait, "1.66.0", Some(91611), None),
+    /// Allows `#[track_caller]` on async functions.
+    (active, async_fn_track_caller, "CURRENT_RUSTC_VERSION", Some(110011), None),
     /// Allows builtin # foo() syntax
     (active, builtin_syntax, "1.71.0", Some(110680), None),
     /// Allows `c"foo"` literals.

compiler/rustc_lint/src/builtin.rs

@@ -1259,8 +1259,8 @@ fn check_attribute(&mut self, cx: &LateContext<'_>, attr: &ast::Attribute) {
 
 declare_lint! {
     /// The `ungated_async_fn_track_caller` lint warns when the
-    /// `#[track_caller]` attribute is used on an async function, method, or
-    /// closure, without enabling the corresponding unstable feature flag.
+    /// `#[track_caller]` attribute is used on an async function
+    /// without enabling the corresponding unstable feature flag.
     ///
     /// ### Example
     ///
@@ -1274,13 +1274,13 @@ fn check_attribute(&mut self, cx: &LateContext<'_>, attr: &ast::Attribute) {
     /// ### Explanation
     ///
     /// The attribute must be used in conjunction with the
-    /// [`closure_track_caller` feature flag]. Otherwise, the `#[track_caller]`
+    /// [`async_fn_track_caller` feature flag]. Otherwise, the `#[track_caller]`
     /// annotation will function as a no-op.
     ///
-    /// [`closure_track_caller` feature flag]: https://doc.rust-lang.org/beta/unstable-book/language-features/closure-track-caller.html
+    /// [`async_fn_track_caller` feature flag]: https://doc.rust-lang.org/beta/unstable-book/language-features/async-fn-track-caller.html
     UNGATED_ASYNC_FN_TRACK_CALLER,
     Warn,
-    "enabling track_caller on an async fn is a no-op unless the closure_track_caller feature is enabled"
+    "enabling track_caller on an async fn is a no-op unless the async_fn_track_caller feature is enabled"
 }
 
 declare_lint_pass!(
@@ -1300,7 +1300,7 @@ fn check_fn(
         def_id: LocalDefId,
     ) {
         if fn_kind.asyncness() == IsAsync::Async
-            && !cx.tcx.features().closure_track_caller
+            && !cx.tcx.features().async_fn_track_caller
             // Now, check if the function has the `#[track_caller]` attribute
             && let Some(attr) = cx.tcx.get_attr(def_id, sym::track_caller)
         {

compiler/rustc_lint/src/lints.rs

@@ -250,7 +250,7 @@ fn decorate_lint<'b>(
         rustc_session::parse::add_feature_diagnostics(
             diag,
             &self.parse_sess,
-            sym::closure_track_caller,
+            sym::async_fn_track_caller,
         );
         diag
     }

compiler/rustc_span/src/symbol.rs

@@ -400,6 +400,7 @@
         async_await,
         async_closure,
         async_fn_in_trait,
+        async_fn_track_caller,
         atomic,
         atomic_mod,
         atomics,

tests/ui/async-await/track-caller/async-block.afn.stderr

@@ -0,0 +1,30 @@
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:8:13
+   |
+LL |     let _ = #[track_caller] async {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:15:13
+   |
+LL |     let _ = #[track_caller] async {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:23:17
+   |
+LL |         let _ = #[track_caller] async {
+   |                 ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/async-block.nofeat.stderr

@@ -0,0 +1,30 @@
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:8:13
+   |
+LL |     let _ = #[track_caller] async {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:15:13
+   |
+LL |     let _ = #[track_caller] async {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-block.rs:23:17
+   |
+LL |         let _ = #[track_caller] async {
+   |                 ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/async-block.rs

@@ -1,9 +1,27 @@
 // edition:2021
+// revisions: afn nofeat
 
 #![feature(stmt_expr_attributes)]
+#![cfg_attr(afn, feature(async_fn_track_caller))]
 
 fn main() {
     let _ = #[track_caller] async {
         //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
     };
 }
+
+#[track_caller]
+async fn foo() {
+    let _ = #[track_caller] async {
+        //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+    };
+}
+
+#[track_caller]
+async fn foo2() {
+    let _ = async {
+        let _ = #[track_caller] async {
+            //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+        };
+    };
+}

tests/ui/async-await/track-caller/async-block.stderr

@@ -1,12 +0,0 @@
-error[E0658]: `#[track_caller]` on closures is currently unstable
-  --> $DIR/async-block.rs:6:13
-   |
-LL |     let _ = #[track_caller] async {
-   |             ^^^^^^^^^^^^^^^
-   |
-   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
-   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/async-closure-gate.afn.stderr

@@ -0,0 +1,57 @@
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:8:13
+   |
+LL |     let _ = #[track_caller] async || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:15:13
+   |
+LL |     let _ = #[track_caller] async || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:21:13
+   |
+LL |     let _ = #[track_caller] || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:28:17
+   |
+LL |         let _ = #[track_caller] || {
+   |                 ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:36:9
+   |
+LL |         #[track_caller] || {
+   |         ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:45:13
+   |
+LL |             #[track_caller] || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/async-closure-gate.nofeat.stderr

@@ -0,0 +1,57 @@
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:8:13
+   |
+LL |     let _ = #[track_caller] async || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:15:13
+   |
+LL |     let _ = #[track_caller] async || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:21:13
+   |
+LL |     let _ = #[track_caller] || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:28:17
+   |
+LL |         let _ = #[track_caller] || {
+   |                 ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:36:9
+   |
+LL |         #[track_caller] || {
+   |         ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error[E0658]: `#[track_caller]` on closures is currently unstable
+  --> $DIR/async-closure-gate.rs:45:13
+   |
+LL |             #[track_caller] || {
+   |             ^^^^^^^^^^^^^^^
+   |
+   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
+   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/async-closure-gate.rs

@@ -1,9 +1,50 @@
 // edition:2021
+// revisions: afn nofeat
 
 #![feature(async_closure, stmt_expr_attributes)]
+#![cfg_attr(afn, feature(async_fn_track_caller))]
 
 fn main() {
     let _ = #[track_caller] async || {
         //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
     };
 }
+
+#[track_caller]
+async fn foo() {
+    let _ = #[track_caller] async || {
+        //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+    };
+}
+
+async fn foo2() {
+    let _ = #[track_caller] || {
+        //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+    };
+}
+
+fn foo3() {
+    async {
+        let _ = #[track_caller] || {
+            //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+        };
+    }
+}
+
+async fn foo4() {
+    let _ = || {
+        #[track_caller] || {
+            //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+        };
+    };
+}
+
+fn foo5() {
+    async {
+        let _ = || {
+            #[track_caller] || {
+                //~^ ERROR `#[track_caller]` on closures is currently unstable [E0658]
+            };
+        };
+    }
+}

tests/ui/async-await/track-caller/async-closure-gate.stderr

@@ -1,12 +0,0 @@
-error[E0658]: `#[track_caller]` on closures is currently unstable
-  --> $DIR/async-closure-gate.rs:6:13
-   |
-LL |     let _ = #[track_caller] async || {
-   |             ^^^^^^^^^^^^^^^
-   |
-   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
-   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0658`.

tests/ui/async-await/track-caller/panic-track-caller.cls.stderr

@@ -0,0 +1,31 @@
+warning: `#[track_caller]` on async functions is a no-op
+  --> $DIR/panic-track-caller.rs:53:1
+   |
+LL |   #[track_caller]
+   |   ^^^^^^^^^^^^^^^
+...
+LL | / async fn bar_track_caller() {
+LL | |     panic!()
+LL | | }
+   | |_- this function will not propagate the caller location
+   |
+   = note: see issue #110011 <https://github.com/rust-lang/rust/issues/110011> for more information
+   = help: add `#![feature(async_fn_track_caller)]` to the crate attributes to enable
+   = note: `#[warn(ungated_async_fn_track_caller)]` on by default
+
+warning: `#[track_caller]` on async functions is a no-op
+  --> $DIR/panic-track-caller.rs:67:5
+   |
+LL |       #[track_caller]
+   |       ^^^^^^^^^^^^^^^
+...
+LL | /     async fn bar_assoc() {
+LL | |         panic!();
+LL | |     }
+   | |_____- this function will not propagate the caller location
+   |
+   = note: see issue #110011 <https://github.com/rust-lang/rust/issues/110011> for more information
+   = help: add `#![feature(async_fn_track_caller)]` to the crate attributes to enable
+
+warning: 2 warnings emitted
+

tests/ui/async-await/track-caller/panic-track-caller.nofeat.stderr

@@ -1,29 +1,31 @@
 warning: `#[track_caller]` on async functions is a no-op
-  --> $DIR/panic-track-caller.rs:50:1
+  --> $DIR/panic-track-caller.rs:53:1
    |
 LL |   #[track_caller]
    |   ^^^^^^^^^^^^^^^
+...
 LL | / async fn bar_track_caller() {
 LL | |     panic!()
 LL | | }
    | |_- this function will not propagate the caller location
    |
-   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
-   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+   = note: see issue #110011 <https://github.com/rust-lang/rust/issues/110011> for more information
+   = help: add `#![feature(async_fn_track_caller)]` to the crate attributes to enable
    = note: `#[warn(ungated_async_fn_track_caller)]` on by default
 
 warning: `#[track_caller]` on async functions is a no-op
-  --> $DIR/panic-track-caller.rs:62:5
+  --> $DIR/panic-track-caller.rs:67:5
    |
 LL |       #[track_caller]
    |       ^^^^^^^^^^^^^^^
+...
 LL | /     async fn bar_assoc() {
 LL | |         panic!();
 LL | |     }
    | |_____- this function will not propagate the caller location
    |
-   = note: see issue #87417 <https://github.com/rust-lang/rust/issues/87417> for more information
-   = help: add `#![feature(closure_track_caller)]` to the crate attributes to enable
+   = note: see issue #110011 <https://github.com/rust-lang/rust/issues/110011> for more information
+   = help: add `#![feature(async_fn_track_caller)]` to the crate attributes to enable
 
 warning: 2 warnings emitted
 

tests/ui/async-await/track-caller/panic-track-caller.rs

@@ -1,9 +1,12 @@
 // run-pass
 // edition:2021
-// revisions: feat nofeat
+// revisions: afn cls nofeat
 // needs-unwind
+// gate-test-async_fn_track_caller
 #![feature(async_closure, stmt_expr_attributes)]
-#![cfg_attr(feat, feature(closure_track_caller))]
+#![cfg_attr(afn, feature(async_fn_track_caller))]
+#![cfg_attr(cls, feature(closure_track_caller))]
+#![allow(unused)]
 
 use std::future::Future;
 use std::panic;
@@ -47,7 +50,9 @@ async fn foo() {
     bar().await
 }
 
-#[track_caller] //[nofeat]~ WARN `#[track_caller]` on async functions is a no-op
+#[track_caller]
+//[cls]~^ WARN `#[track_caller]` on async functions is a no-op
+//[nofeat]~^^ WARN `#[track_caller]` on async functions is a no-op
 async fn bar_track_caller() {
     panic!()
 }
@@ -59,7 +64,9 @@ async fn foo_track_caller() {
 struct Foo;
 
 impl Foo {
-    #[track_caller] //[nofeat]~ WARN `#[track_caller]` on async functions is a no-op
+    #[track_caller]
+    //[cls]~^ WARN `#[track_caller]` on async functions is a no-op
+    //[nofeat]~^^ WARN `#[track_caller]` on async functions is a no-op
     async fn bar_assoc() {
         panic!();
     }
@@ -71,7 +78,7 @@ async fn foo_assoc() {
 
 // Since compilation is expected to fail for this fn when using
 // `nofeat`, we test that separately in `async-closure-gate.rs`
-#[cfg(feat)]
+#[cfg(cls)]
 async fn foo_closure() {
     let c = #[track_caller] async || {
         panic!();
@@ -81,7 +88,7 @@ async fn foo_closure() {
 
 // Since compilation is expected to fail for this fn when using
 // `nofeat`, we test that separately in `async-block.rs`
-#[cfg(feat)]
+#[cfg(cls)]
 async fn foo_block() {
     let a = #[track_caller] async {
         panic!();
@@ -106,21 +113,22 @@ fn panicked_at(f: impl FnOnce() + panic::UnwindSafe) -> u32 {
 }
 
 fn main() {
-    assert_eq!(panicked_at(|| block_on(foo())), 43);
+    assert_eq!(panicked_at(|| block_on(foo())), 46
+);
 
-    #[cfg(feat)]
-    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 56);
-    #[cfg(nofeat)]
-    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 52);
+    #[cfg(afn)]
+    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 61);
+    #[cfg(any(cls, nofeat))]
+    assert_eq!(panicked_at(|| block_on(foo_track_caller())), 57);
 
-    #[cfg(feat)]
-    assert_eq!(panicked_at(|| block_on(foo_assoc())), 69);
-    #[cfg(nofeat)]
-    assert_eq!(panicked_at(|| block_on(foo_assoc())), 64);
+    #[cfg(afn)]
+    assert_eq!(panicked_at(|| block_on(foo_assoc())), 76);
+    #[cfg(any(cls, nofeat))]
+    assert_eq!(panicked_at(|| block_on(foo_assoc())), 71);
 
-    #[cfg(feat)]
-    assert_eq!(panicked_at(|| block_on(foo_closure())), 79);
+    #[cfg(cls)]
+    assert_eq!(panicked_at(|| block_on(foo_closure())), 84);
 
-    #[cfg(feat)]
-    assert_eq!(panicked_at(|| block_on(foo_block())), 89);
+    #[cfg(cls)]
+    assert_eq!(panicked_at(|| block_on(foo_block())), 96);
 }

tests/ui/proc-macro/meta-macro-hygiene.stdout

@@ -18,7 +18,7 @@ Respanned: TokenStream [Ident { ident: "$crate", span: $DIR/auxiliary/make-macro
 use core /* 0#1 */::prelude /* 0#1 */::rust_2018 /* 0#1 */::*;
 #[macro_use /* 0#1 */]
 extern crate core /* 0#1 */;
-extern crate compiler_builtins /* 443 */ as _ /* 0#1 */;
+extern crate compiler_builtins /* 444 */ as _ /* 0#1 */;
 // Don't load unnecessary hygiene information from std
 extern crate std /* 0#0 */;
 

tests/ui/proc-macro/nonterminal-token-hygiene.stdout

@@ -39,7 +39,7 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
 use ::core /* 0#1 */::prelude /* 0#1 */::rust_2015 /* 0#1 */::*;
 #[macro_use /* 0#1 */]
 extern crate core /* 0#2 */;
-extern crate compiler_builtins /* 443 */ as _ /* 0#2 */;
+extern crate compiler_builtins /* 444 */ as _ /* 0#2 */;
 // Don't load unnecessary hygiene information from std
 extern crate std /* 0#0 */;