Auto merge of rust-lang#77198 - jonas-schievink:rollup-i59i41h, r=jonas-schievink

Rollup of 15 pull requests

Successful merges:

 - rust-lang#76932 (Relax promises about condition variable.)
 - rust-lang#76973 (Unstably allow assume intrinsic in const contexts)
 - rust-lang#77005 (BtreeMap: refactoring around edges)
 - rust-lang#77066 (Fix dest prop miscompilation around references)
 - rust-lang#77073 (dead_code: look at trait impls even if they don't contain items)
 - rust-lang#77086 (Include libunwind in the rust-src component.)
 - rust-lang#77097 (Make [].as_[mut_]ptr_range() (unstably) const.)
 - rust-lang#77106 (clarify that `changelog-seen = 1` goes to the beginning of config.toml)
 - rust-lang#77120 (Add `--keep-stage-std` to `x.py` for keeping only standard library artifacts)
 - rust-lang#77126 (Invalidate local LLVM cache less often)
 - rust-lang#77146 (Install std for non-host targets)
 - rust-lang#77155 (remove enum name from ImplSource variants)
 - rust-lang#77176 (Removing erroneous semicolon in transmute documentation)
 - rust-lang#77183 (Allow multiple allow_internal_unstable attributes)
 - rust-lang#77189 (Remove extra space from vec drawing)

Failed merges:

r? `@ghost`

Author: bors

compiler/rustc_attr/src/builtin.rs

@@ -1022,14 +1022,21 @@ pub fn find_transparency(
 
 pub fn allow_internal_unstable<'a>(
     sess: &'a Session,
-    attrs: &[Attribute],
+    attrs: &'a [Attribute],
 ) -> Option<impl Iterator<Item = Symbol> + 'a> {
-    let attr = sess.find_by_name(attrs, sym::allow_internal_unstable)?;
-    let list = attr.meta_item_list().or_else(|| {
-        sess.diagnostic()
-            .span_err(attr.span, "allow_internal_unstable expects list of feature names");
-        None
-    })?;
+    let attrs = sess.filter_by_name(attrs, sym::allow_internal_unstable);
+    let list = attrs
+        .filter_map(move |attr| {
+            attr.meta_item_list().or_else(|| {
+                sess.diagnostic().span_err(
+                    attr.span,
+                    "`allow_internal_unstable` expects a list of feature names",
+                );
+                None
+            })
+        })
+        .flatten();
+
     Some(list.into_iter().filter_map(move |it| {
         let name = it.ident().map(|ident| ident.name);
         if name.is_none() {

compiler/rustc_codegen_ssa/src/traits/intrinsic.rs

@@ -5,9 +5,9 @@ use rustc_span::Span;
 use rustc_target::abi::call::FnAbi;
 
 pub trait IntrinsicCallMethods<'tcx>: BackendTypes {
-    /// Remember to add all intrinsics here, in librustc_typeck/check/mod.rs,
-    /// and in libcore/intrinsics.rs; if you need access to any llvm intrinsics,
-    /// add them to librustc_codegen_llvm/context.rs
+    /// Remember to add all intrinsics here, in `compiler/rustc_typeck/src/check/mod.rs`,
+    /// and in `library/core/src/intrinsics.rs`; if you need access to any LLVM intrinsics,
+    /// add them to `compiler/rustc_codegen_llvm/src/context.rs`.
     fn codegen_intrinsic_call(
         &mut self,
         instance: ty::Instance<'tcx>,