Auto merge of #133500 - GuillaumeGomez:rollup-4vcthwo, r=GuillaumeGomez

Rollup of 13 pull requests

Successful merges:

 - #133411 (the emscripten OS no longer exists on non-wasm targets)
 - #133419 (Added a doc test for std::path::strip_prefix)
 - #133430 (Tweak parameter mismatch explanation to not say `{unknown}`)
 - #133443 (Remove dead code stemming from the old effects desugaring (II))
 - #133450 (remove "onur-ozkan" from  users_on_vacation)
 - #133454 (Update test expectations to accept LLVM 'initializes' attribute)
 - #133462 (Use ReadCache for archive reading in bootstrap)
 - #133464 (std::thread: avoid leading whitespace in some panic messages)
 - #133467 (tests: Add recursive associated type bound regression tests)
 - #133470 (Cleanup: delete `//@ pretty-expanded` directive)
 - #133473 (tests: Add regression test for recursive enum with Cow and Clone)
 - #133481 (Disable `avr-rjmp-offset` on Windows for now)
 - #133495 (add test for alias-bound shadowing, rename folder)

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

Author: bors

compiler/rustc_ast_lowering/src/lib.rs

@@ -2117,11 +2117,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             hir::ConstArgKind::Anon(ct)
         };
 
-        self.arena.alloc(hir::ConstArg {
-            hir_id: self.next_id(),
-            kind: ct_kind,
-            is_desugared_from_effects: false,
-        })
+        self.arena.alloc(hir::ConstArg { hir_id: self.next_id(), kind: ct_kind })
     }
 
     /// See [`hir::ConstArg`] for when to use this function vs
@@ -2163,19 +2159,11 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                 None,
             );
 
-            return ConstArg {
-                hir_id: self.next_id(),
-                kind: hir::ConstArgKind::Path(qpath),
-                is_desugared_from_effects: false,
-            };
+            return ConstArg { hir_id: self.next_id(), kind: hir::ConstArgKind::Path(qpath) };
         }
 
         let lowered_anon = self.lower_anon_const_to_anon_const(anon);
-        ConstArg {
-            hir_id: self.next_id(),
-            kind: hir::ConstArgKind::Anon(lowered_anon),
-            is_desugared_from_effects: false,
-        }
+        ConstArg { hir_id: self.next_id(), kind: hir::ConstArgKind::Anon(lowered_anon) }
     }
 
     /// See [`hir::ConstArg`] for when to use this function vs

compiler/rustc_hir/src/hir.rs

@@ -261,8 +261,6 @@ pub struct ConstArg<'hir> {
     #[stable_hasher(ignore)]
     pub hir_id: HirId,
     pub kind: ConstArgKind<'hir>,
-    /// Indicates whether this comes from a `~const` desugaring.
-    pub is_desugared_from_effects: bool,
 }
 
 impl<'hir> ConstArg<'hir> {
@@ -462,14 +460,7 @@ impl<'hir> GenericArgs<'hir> {
     /// This function returns the number of type and const generic params.
     /// It should only be used for diagnostics.
     pub fn num_generic_params(&self) -> usize {
-        self.args
-            .iter()
-            .filter(|arg| match arg {
-                GenericArg::Lifetime(_)
-                | GenericArg::Const(ConstArg { is_desugared_from_effects: true, .. }) => false,
-                _ => true,
-            })
-            .count()
+        self.args.iter().filter(|arg| !matches!(arg, GenericArg::Lifetime(_))).count()
     }
 
     /// The span encompassing the arguments and constraints[^1] inside the surrounding brackets.

compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs

@@ -2347,9 +2347,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                 let check_for_matched_generics = || {
                     if matched_inputs.iter().any(|x| x.is_some())
-                        && params_with_generics.iter().any(|x| x.0.is_some())
+                        && params_with_generics.iter().any(|x| x.1.is_some())
                     {
-                        for (idx, (generic, _)) in params_with_generics.iter().enumerate() {
+                        for &(idx, generic, _) in &params_with_generics {
                             // Param has to have a generic and be matched to be relevant
                             if matched_inputs[idx.into()].is_none() {
                                 continue;
@@ -2362,7 +2362,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             for unmatching_idx in idx + 1..params_with_generics.len() {
                                 if matched_inputs[unmatching_idx.into()].is_none()
                                     && let Some(unmatched_idx_param_generic) =
-                                        params_with_generics[unmatching_idx].0
+                                        params_with_generics[unmatching_idx].1
                                     && unmatched_idx_param_generic.name.ident()
                                         == generic.name.ident()
                                 {
@@ -2377,8 +2377,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                 let check_for_matched_generics = check_for_matched_generics();
 
-                for (idx, (generic_param, param)) in
-                    params_with_generics.iter().enumerate().filter(|(idx, _)| {
+                for &(idx, generic_param, param) in
+                    params_with_generics.iter().filter(|&(idx, _, _)| {
                         check_for_matched_generics
                             || expected_idx.is_none_or(|expected_idx| expected_idx == *idx)
                     })
@@ -2390,8 +2390,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
                     let other_params_matched: Vec<(usize, &hir::Param<'_>)> = params_with_generics
                         .iter()
-                        .enumerate()
-                        .filter(|(other_idx, (other_generic_param, _))| {
+                        .filter(|(other_idx, other_generic_param, _)| {
                             if *other_idx == idx {
                                 return false;
                             }
@@ -2410,18 +2409,18 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             }
                             other_generic_param.name.ident() == generic_param.name.ident()
                         })
-                        .map(|(other_idx, (_, other_param))| (other_idx, *other_param))
+                        .map(|&(other_idx, _, other_param)| (other_idx, other_param))
                         .collect();
 
                     if !other_params_matched.is_empty() {
                         let other_param_matched_names: Vec<String> = other_params_matched
                             .iter()
-                            .map(|(_, other_param)| {
+                            .map(|(idx, other_param)| {
                                 if let hir::PatKind::Binding(_, _, ident, _) = other_param.pat.kind
                                 {
                                     format!("`{ident}`")
                                 } else {
-                                    "{unknown}".to_string()
+                                    format!("parameter #{}", idx + 1)
                                 }
                             })
                             .collect();
@@ -2478,18 +2477,18 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 {
                     let param_idents_matching: Vec<String> = params_with_generics
                         .iter()
-                        .filter(|(generic, _)| {
+                        .filter(|(_, generic, _)| {
                             if let Some(generic) = generic {
                                 generic.name.ident() == generic_param.name.ident()
                             } else {
                                 false
                             }
                         })
-                        .map(|(_, param)| {
+                        .map(|(idx, _, param)| {
                             if let hir::PatKind::Binding(_, _, ident, _) = param.pat.kind {
                                 format!("`{ident}`")
                             } else {
-                                "{unknown}".to_string()
+                                format!("parameter #{}", idx + 1)
                             }
                         })
                         .collect();
@@ -2498,8 +2497,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         spans.push_span_label(
                             generic_param.span,
                             format!(
-                                "{} all reference this parameter {}",
+                                "{} {} reference this parameter `{}`",
                                 display_list_with_comma_and(&param_idents_matching),
+                                if param_idents_matching.len() == 2 { "both" } else { "all" },
                                 generic_param.name.ident().name,
                             ),
                         );
@@ -2580,7 +2580,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
         if let Some(params_with_generics) = self.get_hir_params_with_generics(def_id, is_method) {
             debug_assert_eq!(params_with_generics.len(), matched_inputs.len());
-            for (idx, (generic_param, _)) in params_with_generics.iter().enumerate() {
+            for &(idx, generic_param, _) in &params_with_generics {
                 if matched_inputs[idx.into()].is_none() {
                     continue;
                 }
@@ -2594,20 +2594,20 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 };
 
                 let mut idxs_matched: Vec<usize> = vec![];
-                for (other_idx, (_, _)) in params_with_generics.iter().enumerate().filter(
-                    |(other_idx, (other_generic_param, _))| {
-                        if *other_idx == idx {
+                for &(other_idx, _, _) in
+                    params_with_generics.iter().filter(|&&(other_idx, other_generic_param, _)| {
+                        if other_idx == idx {
                             return false;
                         }
                         let Some(other_generic_param) = other_generic_param else {
                             return false;
                         };
-                        if matched_inputs[(*other_idx).into()].is_some() {
+                        if matched_inputs[other_idx.into()].is_some() {
                             return false;
                         }
                         other_generic_param.name.ident() == generic_param.name.ident()
-                    },
-                ) {
+                    })
+                {
                     idxs_matched.push(other_idx);
                 }
 
@@ -2642,7 +2642,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         &self,
         def_id: DefId,
         is_method: bool,
-    ) -> Option<Vec<(Option<&hir::GenericParam<'_>>, &hir::Param<'_>)>> {
+    ) -> Option<Vec<(usize, Option<&hir::GenericParam<'_>>, &hir::Param<'_>)>> {
         let fn_node = self.tcx.hir().get_if_local(def_id)?;
         let fn_decl = fn_node.fn_decl()?;
 
@@ -2685,7 +2685,14 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
 
         debug_assert_eq!(params.len(), generic_params.len());
-        Some(generic_params.into_iter().zip(params).collect())
+        Some(
+            generic_params
+                .into_iter()
+                .zip(params)
+                .enumerate()
+                .map(|(a, (b, c))| (a, b, c))
+                .collect(),
+        )
     }
 }
 

compiler/rustc_metadata/src/creader.rs

@@ -1172,7 +1172,7 @@ fn attempt_load_dylib(path: &Path) -> Result<libloading::Library, libloading::Er
         // the expected format is lib<name>.a(libname.so) for the actual
         // dynamic library
         let library_name = path.file_stem().expect("expect a library name");
-        let mut archive_member = OsString::from("a(");
+        let mut archive_member = std::ffi::OsString::from("a(");
         archive_member.push(library_name);
         archive_member.push(".so)");
         let new_path = path.with_extension(archive_member);

compiler/rustc_target/src/spec/tests/tests_impl.rs

@@ -19,6 +19,9 @@ impl Target {
         if self.is_like_msvc {
             assert!(self.is_like_windows);
         }
+        if self.os == "emscripten" {
+            assert!(self.is_like_wasm);
+        }
 
         // Check that default linker flavor is compatible with some other key properties.
         assert_eq!(self.is_like_osx, matches!(self.linker_flavor, LinkerFlavor::Darwin(..)));
@@ -137,7 +140,7 @@ impl Target {
             assert!(self.dynamic_linking);
         }
         // Apparently PIC was slow on wasm at some point, see comments in wasm_base.rs
-        if self.dynamic_linking && !(self.is_like_wasm && self.os != "emscripten") {
+        if self.dynamic_linking && !self.is_like_wasm {
             assert_eq!(self.relocation_model, RelocModel::Pic);
         }
         if self.position_independent_executables {

library/std/src/path.rs

@@ -2504,6 +2504,7 @@ impl Path {
     /// assert_eq!(path.strip_prefix("/test/haha/foo.txt/"), Ok(Path::new("")));
     ///
     /// assert!(path.strip_prefix("test").is_err());
+    /// assert!(path.strip_prefix("/te").is_err());
     /// assert!(path.strip_prefix("/haha").is_err());
     ///
     /// let prefix = PathBuf::from("/test/");

library/std/src/thread/current.rs

@@ -243,17 +243,17 @@ fn init_current(current: *mut ()) -> Thread {
         // a particular API should be entirely allocation-free, feel free to open
         // an issue on the Rust repository, we'll see what we can do.
         rtabort!(
-            "\n
-            Attempted to access thread-local data while allocating said data.\n
-            Do not access functions that allocate in the global allocator!\n
-            This is a bug in the global allocator.\n
-        "
+            "\n\
+            Attempted to access thread-local data while allocating said data.\n\
+            Do not access functions that allocate in the global allocator!\n\
+            This is a bug in the global allocator.\n\
+            "
         )
     } else {
         debug_assert_eq!(current, DESTROYED);
         panic!(
-            "use of std::thread::current() is not possible after the thread's
-         local data has been destroyed"
+            "use of std::thread::current() is not possible after the thread's \
+            local data has been destroyed"
         )
     }
 }

src/bootstrap/Cargo.toml

@@ -47,7 +47,7 @@ fd-lock = "4.0"
 home = "0.5"
 ignore = "0.4"
 libc = "0.2"
-object = { version = "0.36.3", default-features = false, features = ["archive", "coff", "read_core", "unaligned"] }
+object = { version = "0.36.3", default-features = false, features = ["archive", "coff", "read_core", "std", "unaligned"] }
 opener = "0.5"
 semver = "1.0"
 serde = "1.0"

src/bootstrap/src/utils/helpers.rs

@@ -61,18 +61,18 @@ pub fn is_dylib(path: &Path) -> bool {
 }
 
 fn is_aix_shared_archive(path: &Path) -> bool {
-    // FIXME(#133268): reading the entire file as &[u8] into memory seems excessive
-    // look into either mmap it or use the ReadCache
-    let data = match fs::read(path) {
-        Ok(data) => data,
+    let file = match fs::File::open(path) {
+        Ok(file) => file,
         Err(_) => return false,
     };
-    let file = match ArchiveFile::parse(&*data) {
-        Ok(file) => file,
+    let reader = object::ReadCache::new(file);
+    let archive = match ArchiveFile::parse(&reader) {
+        Ok(result) => result,
         Err(_) => return false,
     };
 
-    file.members()
+    archive
+        .members()
         .filter_map(Result::ok)
         .any(|entry| String::from_utf8_lossy(entry.name()).contains(".so"))
 }

src/librustdoc/clean/mod.rs

@@ -2516,14 +2516,6 @@ fn clean_generic_args<'tcx>(
                     }
                     hir::GenericArg::Lifetime(_) => GenericArg::Lifetime(Lifetime::elided()),
                     hir::GenericArg::Type(ty) => GenericArg::Type(clean_ty(ty, cx)),
-                    // Checking for `is_desugared_from_effects` on the `AnonConst` not only accounts for the case
-                    // where the argument is `host` but for all possible cases (e.g., `true`, `false`).
-                    hir::GenericArg::Const(hir::ConstArg {
-                        is_desugared_from_effects: true,
-                        ..
-                    }) => {
-                        return None;
-                    }
                     hir::GenericArg::Const(ct) => GenericArg::Const(Box::new(clean_const(ct, cx))),
                     hir::GenericArg::Infer(_inf) => GenericArg::Infer,
                 })