Prepare Rust 1.71.1

RELEASES.md

@@ -1,3 +1,12 @@
+Version 1.71.1 (2023-08-03)
+===========================
+
+- [Fix bash completion for users of Rustup](https://github.com/rust-lang/rust/pull/113579)
+- [Do not show `suspicious_double_ref_op` lint when calling `borrow()`](https://github.com/rust-lang/rust/pull/112517)
+- [Fix ICE: substitute types before checking inlining compatibility](https://github.com/rust-lang/rust/pull/113802)
+- [Fix ICE: don't use `can_eq` in `derive(..)` suggestion for missing method](https://github.com/rust-lang/rust/pull/111516)
+- [Fix building Rust 1.71.0 from the source tarball](https://github.com/rust-lang/rust/issues/113678)
+
 Version 1.71.0 (2023-07-13)
 ==========================
 

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -2104,20 +2104,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     | sym::Hash
                     | sym::Debug => true,
                     _ => false,
-                } && match trait_pred.trait_ref.substs.as_slice() {
-                    // Only suggest deriving if lhs == rhs...
-                    [lhs, rhs] => {
-                        if let Some(lhs) = lhs.as_type()
-                            && let Some(rhs) = rhs.as_type()
-                        {
-                            self.can_eq(self.param_env, lhs, rhs)
-                        } else {
-                            false
-                        }
-                    },
-                    // Unary ops can always be derived
-                    [_] => true,
-                    _ => false,
                 };
                 if can_derive {
                     let self_name = trait_pred.self_ty().to_string();

compiler/rustc_lint/messages.ftl

@@ -463,13 +463,11 @@ lint_requested_level = requested on the command line with `{$level} {$lint_name}
 lint_supertrait_as_deref_target = `{$t}` implements `Deref` with supertrait `{$target_principal}` as target
     .label = target type is set here
 
-lint_suspicious_double_ref_op =
-    using `.{$call}()` on a double reference, which returns `{$ty}` instead of {$op ->
-        *[should_not_happen] [{$op}]
-        [deref] dereferencing
-        [borrow] borrowing
-        [clone] cloning
-    } the inner type
+lint_suspicious_double_ref_clone =
+    using `.clone()` on a double reference, which returns `{$ty}` instead of cloning the inner type
+
+lint_suspicious_double_ref_deref =
+    using `.deref()` on a double reference, which returns `{$ty}` instead of dereferencing the inner type
 
 lint_trivial_untranslatable_diag = diagnostic with static strings only
 

compiler/rustc_lint/src/lints.rs

@@ -1188,11 +1188,15 @@ pub struct NoopMethodCallDiag<'a> {
 }
 
 #[derive(LintDiagnostic)]
-#[diag(lint_suspicious_double_ref_op)]
-pub struct SuspiciousDoubleRefDiag<'a> {
-    pub call: Symbol,
+#[diag(lint_suspicious_double_ref_deref)]
+pub struct SuspiciousDoubleRefDerefDiag<'a> {
+    pub ty: Ty<'a>,
+}
+
+#[derive(LintDiagnostic)]
+#[diag(lint_suspicious_double_ref_clone)]
+pub struct SuspiciousDoubleRefCloneDiag<'a> {
     pub ty: Ty<'a>,
-    pub op: &'static str,
 }
 
 // pass_by_value.rs

compiler/rustc_lint/src/noop_method_call.rs

@@ -1,5 +1,7 @@
 use crate::context::LintContext;
-use crate::lints::{NoopMethodCallDiag, SuspiciousDoubleRefDiag};
+use crate::lints::{
+    NoopMethodCallDiag, SuspiciousDoubleRefCloneDiag, SuspiciousDoubleRefDerefDiag,
+};
 use crate::LateContext;
 use crate::LateLintPass;
 use rustc_hir::def::DefKind;
@@ -76,22 +78,22 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
 
         // We only care about method calls corresponding to the `Clone`, `Deref` and `Borrow`
         // traits and ignore any other method call.
-        let did = match cx.typeck_results().type_dependent_def(expr.hir_id) {
-            // Verify we are dealing with a method/associated function.
-            Some((DefKind::AssocFn, did)) => match cx.tcx.trait_of_item(did) {
-                // Check that we're dealing with a trait method for one of the traits we care about.
-                Some(trait_id)
-                    if matches!(
-                        cx.tcx.get_diagnostic_name(trait_id),
-                        Some(sym::Borrow | sym::Clone | sym::Deref)
-                    ) =>
-                {
-                    did
-                }
-                _ => return,
-            },
-            _ => return,
+
+        let Some((DefKind::AssocFn, did)) =
+            cx.typeck_results().type_dependent_def(expr.hir_id)
+        else {
+            return;
+        };
+
+        let Some(trait_id) = cx.tcx.trait_of_item(did) else { return };
+
+        if !matches!(
+            cx.tcx.get_diagnostic_name(trait_id),
+            Some(sym::Borrow | sym::Clone | sym::Deref)
+        ) {
+            return;
         };
+
         let substs = cx
             .tcx
             .normalize_erasing_regions(cx.param_env, cx.typeck_results().node_substs(expr.hir_id));
@@ -102,13 +104,6 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
         // (Re)check that it implements the noop diagnostic.
         let Some(name) = cx.tcx.get_diagnostic_name(i.def_id()) else { return };
 
-        let op = match name {
-            sym::noop_method_borrow => "borrow",
-            sym::noop_method_clone => "clone",
-            sym::noop_method_deref => "deref",
-            _ => return,
-        };
-
         let receiver_ty = cx.typeck_results().expr_ty(receiver);
         let expr_ty = cx.typeck_results().expr_ty_adjusted(expr);
         let arg_adjustments = cx.typeck_results().expr_adjustments(receiver);
@@ -129,11 +124,22 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
                 NoopMethodCallDiag { method: call.ident.name, receiver_ty, label: span },
             );
         } else {
-            cx.emit_spanned_lint(
-                SUSPICIOUS_DOUBLE_REF_OP,
-                span,
-                SuspiciousDoubleRefDiag { call: call.ident.name, ty: expr_ty, op },
-            )
+            match name {
+                // If `type_of(x) == T` and `x.borrow()` is used to get `&T`,
+                // then that should be allowed
+                sym::noop_method_borrow => return,
+                sym::noop_method_clone => cx.emit_spanned_lint(
+                    SUSPICIOUS_DOUBLE_REF_OP,
+                    span,
+                    SuspiciousDoubleRefCloneDiag { ty: expr_ty },
+                ),
+                sym::noop_method_deref => cx.emit_spanned_lint(
+                    SUSPICIOUS_DOUBLE_REF_OP,
+                    span,
+                    SuspiciousDoubleRefDerefDiag { ty: expr_ty },
+                ),
+                _ => return,
+            }
         }
     }
 }

compiler/rustc_mir_transform/src/inline.rs

@@ -437,6 +437,10 @@ impl<'tcx> Inliner<'tcx> {
             validation: Ok(()),
         };
 
+        for var_debug_info in callee_body.var_debug_info.iter() {
+            checker.visit_var_debug_info(var_debug_info);
+        }
+
         // Traverse the MIR manually so we can account for the effects of inlining on the CFG.
         let mut work_list = vec![START_BLOCK];
         let mut visited = BitSet::new_empty(callee_body.basic_blocks.len());
@@ -845,7 +849,16 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {
             let parent = Place { local, projection: self.tcx.mk_place_elems(proj_base) };
             let parent_ty = parent.ty(&self.callee_body.local_decls, self.tcx);
             let check_equal = |this: &mut Self, f_ty| {
-                if !util::is_equal_up_to_subtyping(this.tcx, this.param_env, ty, f_ty) {
+                // Fast path if there is nothing to substitute.
+                if ty == f_ty {
+                    return;
+                }
+                let ty = this.instance.subst_mir(this.tcx, ty::EarlyBinder(&ty));
+                let f_ty = this.instance.subst_mir(this.tcx, ty::EarlyBinder(&f_ty));
+                if ty == f_ty {
+                    return;
+                }
+                if !util::is_subtype(this.tcx, this.param_env, ty, f_ty) {
                     trace!(?ty, ?f_ty);
                     this.validation = Err("failed to normalize projection type");
                     return;

src/bootstrap/dist.rs

@@ -1071,11 +1071,7 @@ impl Step for Cargo {
 
         tarball.add_file(&cargo, "bin", 0o755);
         tarball.add_file(etc.join("_cargo"), "share/zsh/site-functions", 0o644);
-        tarball.add_renamed_file(
-            etc.join("cargo.bashcomp.sh"),
-            "src/etc/bash_completion.d",
-            "cargo",
-        );
+        tarball.add_renamed_file(etc.join("cargo.bashcomp.sh"), "etc/bash_completion.d", "cargo");
         tarball.add_dir(etc.join("man"), "share/man/man1");
         tarball.add_legal_and_readme_to("share/doc/cargo");
 

src/tools/lint-docs/src/groups.rs

@@ -39,7 +39,6 @@ impl<'a> LintExtractor<'a> {
     fn collect_groups(&self) -> Result<LintGroups, Box<dyn Error>> {
         let mut result = BTreeMap::new();
         let mut cmd = Command::new(self.rustc_path);
-        cmd.env_remove("LD_LIBRARY_PATH");
         cmd.arg("-Whelp");
         let output = cmd.output().map_err(|e| format!("failed to run command {:?}\n{}", cmd, e))?;
         if !output.status.success() {

src/tools/lint-docs/src/lib.rs

@@ -403,12 +403,6 @@ impl<'a> LintExtractor<'a> {
         fs::write(&tempfile, source)
             .map_err(|e| format!("failed to write {}: {}", tempfile.display(), e))?;
         let mut cmd = Command::new(self.rustc_path);
-        // NOTE: bootstrap sets `LD_LIBRARY_PATH` for building lint-docs itself.
-        // Unfortunately, lint-docs is a bootstrap tool while rustc is built from source,
-        // and sometimes the paths conflict. In particular, when using `download-rustc`,
-        // the LLVM versions can differ between `ci-llvm` and `ci-rustc-sysroot`.
-        // Unset LD_LIBRARY_PATH here so it doesn't interfere with running the compiler.
-        cmd.env_remove("LD_LIBRARY_PATH");
         if options.contains(&"edition2015") {
             cmd.arg("--edition=2015");
         } else {

src/version

@@ -1 +1 @@
-1.71.0
+1.71.1

tests/ui/issues/issue-62375.stderr

@@ -11,8 +11,11 @@ note: an implementation of `PartialEq<fn(()) -> A {A::Value}>` might be missing
    |
 LL | enum A {
    | ^^^^^^ must implement `PartialEq<fn(()) -> A {A::Value}>`
-note: the trait `PartialEq` must be implemented
-  --> $SRC_DIR/core/src/cmp.rs:LL:COL
+help: consider annotating `A` with `#[derive(PartialEq)]`
+   |
+LL + #[derive(PartialEq)]
+LL | enum A {
+   |
 help: use parentheses to construct this tuple variant
    |
 LL |     a == A::Value(/* () */);

tests/ui/lint/issue-112489.rs

@@ -0,0 +1,17 @@
+// check-pass
+use std::borrow::Borrow;
+
+struct S;
+
+trait T: Sized {
+    fn foo(self) {}
+}
+
+impl T for S {}
+impl T for &S {}
+
+fn main() {
+    let s = S;
+    s.borrow().foo();
+    s.foo();
+}

tests/ui/typeck/derive-sugg-arg-arity.rs

@@ -0,0 +1,8 @@
+pub struct A;
+
+fn main() {
+    match () {
+        _ => match A::partial_cmp() {},
+        //~^ ERROR the function or associated item `partial_cmp` exists for struct `A`, but its trait bounds were not satisfied
+    }
+}

tests/ui/typeck/derive-sugg-arg-arity.stderr

@@ -0,0 +1,31 @@
+error[E0599]: the function or associated item `partial_cmp` exists for struct `A`, but its trait bounds were not satisfied
+  --> $DIR/derive-sugg-arg-arity.rs:5:23
+   |
+LL | pub struct A;
+   | ------------
+   | |
+   | function or associated item `partial_cmp` not found for this struct
+   | doesn't satisfy `A: Iterator`
+   | doesn't satisfy `A: PartialOrd<_>`
+...
+LL |         _ => match A::partial_cmp() {},
+   |                       ^^^^^^^^^^^ function or associated item cannot be called on `A` due to unsatisfied trait bounds
+   |
+   = note: the following trait bounds were not satisfied:
+           `A: PartialOrd<_>`
+           which is required by `&A: PartialOrd<&_>`
+           `A: PartialOrd<_>`
+           which is required by `&mut A: PartialOrd<&mut _>`
+           `A: Iterator`
+           which is required by `&mut A: Iterator`
+note: the trait `Iterator` must be implemented
+  --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
+help: consider annotating `A` with `#[derive(PartialEq, PartialOrd)]`
+   |
+LL + #[derive(PartialEq, PartialOrd)]
+LL | pub struct A;
+   |
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0599`.