Auto merge of #147261 - matthiaskrgr:rollup-yh3fgvc, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang/rust#146281 (Support `#[rustc_align_static]` inside `thread_local!`)
 - rust-lang/rust#146535 (mbe: Implement `unsafe` attribute rules)
 - rust-lang/rust#146585 (indexing: reword help)
 - rust-lang/rust#147004 (Tweak handling of "struct like start" where a struct isn't supported)
 - rust-lang/rust#147221 (Forbid `//@ compile-flags: -Cincremental=` in tests)
 - rust-lang/rust#147225 (Don't enable shared memory by default with Wasm atomics)
 - rust-lang/rust#147227 (implement `Box::take`)
 - rust-lang/rust#147233 (Initialize llvm submodule if not already the case to run citool)
 - rust-lang/rust#147236 (Update books)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/ui/feature-gates/feature-gate-static_align-thread_local.rs b/tests/ui/feature-gates/feature-gate-static_align-thread_local.rs
new file mode 100644
index 00000000000..29d4facffce
--- /dev/null
+++ b/tests/ui/feature-gates/feature-gate-static_align-thread_local.rs
@@ -0,0 +1,11 @@
+// The feature gate error may be emitted twice, but only on certain targets
+//@ dont-require-annotations: ERROR
+//@ dont-check-compiler-stderr
+
+#![crate_type = "lib"]
+
+thread_local! {
+    //~^ ERROR the `#[rustc_align_static]` attribute is an experimental feature
+    #[rustc_align_static(16)]
+    static THREAD_LOCAL: u16 = 0;
+}