Auto merge of rust-lang#126463 - matthiaskrgr:rollup-lnkfibf, r=matth…

…iaskrgr

Rollup of 5 pull requests

Successful merges:

 - rust-lang#124884 (place explicit lifetime bound after generic param)
 - rust-lang#126343 (Remove some msys2 utils)
 - rust-lang#126351 (std::unix::fs::link using direct linkat call for Solaris.)
 - rust-lang#126368 (Remove some unnecessary crate dependencies.)
 - rust-lang#126386 (Migrate `run-make/allow-non-lint-warnings-cmdline` to `rmake.rs`)

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

.github/workflows/ci.yml

@@ -95,8 +95,6 @@ jobs:
           path-type: inherit
           install: >
             make
-            dos2unix
-            diffutils
 
       - name: disable git crlf conversion
         run: git config --global core.autocrlf false

Cargo.lock

@@ -4205,7 +4205,6 @@ dependencies = [
  "rustc_middle",
  "rustc_span",
  "rustc_target",
- "rustc_type_ir",
  "smallvec",
  "tracing",
 ]

compiler/rustc_data_structures/Cargo.toml

@@ -12,7 +12,6 @@ elsa = "=1.7.1"
 ena = "0.14.3"
 indexmap = { version = "2.0.0" }
 jobserver_crate = { version = "0.1.28", package = "jobserver" }
-libc = "0.2"
 measureme = "11"
 rustc-hash = "1.1.0"
 rustc-rayon = { version = "0.5.0", optional = true }
@@ -41,6 +40,11 @@ features = [
     "Win32_System_Threading",
 ]
 
+[target.'cfg(unix)'.dependencies]
+# tidy-alphabetical-start
+libc = "0.2"
+# tidy-alphabetical-end
+
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # tidy-alphabetical-start
 memmap2 = "0.2.1"

compiler/rustc_infer/Cargo.toml

@@ -18,7 +18,6 @@ rustc_macros = { path = "../rustc_macros" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
-rustc_type_ir = { path = "../rustc_type_ir" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
 tracing = "0.1"
 # tidy-alphabetical-end

compiler/rustc_infer/src/infer/error_reporting/mod.rs

@@ -64,11 +64,11 @@ use rustc_errors::{
     codes::*, pluralize, struct_span_code_err, Applicability, Diag, DiagCtxt, DiagStyledString,
     ErrorGuaranteed, IntoDiagArg, StringPart,
 };
-use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::intravisit::Visitor;
 use rustc_hir::lang_items::LangItem;
+use rustc_hir::{self as hir, ParamName};
 use rustc_macros::extension;
 use rustc_middle::bug;
 use rustc_middle::dep_graph::DepContext;
@@ -2429,7 +2429,8 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
             let (type_scope, type_param_sugg_span) = match bound_kind {
                 GenericKind::Param(param) => {
                     let generics = self.tcx.generics_of(generic_param_scope);
-                    let def_id = generics.type_param(param, self.tcx).def_id.expect_local();
+                    let type_param = generics.type_param(param, self.tcx);
+                    let def_id = type_param.def_id.expect_local();
                     let scope = self.tcx.local_def_id_to_hir_id(def_id).owner.def_id;
                     // Get the `hir::Param` to verify whether it already has any bounds.
                     // We do this to avoid suggesting code that ends up as `T: 'a'b`,
@@ -2439,7 +2440,18 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                         Some((span, open_paren_sp)) => Some((span, true, open_paren_sp)),
                         // If `param` corresponds to `Self`, no usable suggestion span.
                         None if generics.has_self && param.index == 0 => None,
-                        None => Some((self.tcx.def_span(def_id).shrink_to_hi(), false, None)),
+                        None => {
+                            let span = if let Some(param) =
+                                hir_generics.params.iter().find(|param| param.def_id == def_id)
+                                && let ParamName::Plain(ident) = param.name
+                            {
+                                ident.span.shrink_to_hi()
+                            } else {
+                                let span = self.tcx.def_span(def_id);
+                                span.shrink_to_hi()
+                            };
+                            Some((span, false, None))
+                        }
                     };
                     (scope, sugg_span)
                 }

library/std/src/sys/pal/unix/fs.rs

@@ -22,16 +22,12 @@ use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
 
 #[cfg(any(all(target_os = "linux", target_env = "gnu"), target_vendor = "apple"))]
 use crate::sys::weak::syscall;
-#[cfg(any(target_os = "android", target_os = "macos", target_os = "solaris"))]
+#[cfg(target_os = "android")]
 use crate::sys::weak::weak;
 
 use libc::{c_int, mode_t};
 
-#[cfg(any(
-    target_os = "solaris",
-    all(target_os = "linux", target_env = "gnu"),
-    target_vendor = "apple",
-))]
+#[cfg(any(all(target_os = "linux", target_env = "gnu"), target_vendor = "apple"))]
 use libc::c_char;
 #[cfg(any(
     all(target_os = "linux", not(target_env = "musl")),
@@ -1753,19 +1749,6 @@ pub fn link(original: &Path, link: &Path) -> io::Result<()> {
                     // Android has `linkat` on newer versions, but we happen to know `link`
                     // always has the correct behavior, so it's here as well.
                     cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
-                } else if #[cfg(any(target_os = "macos", target_os = "solaris"))] {
-                    // MacOS (<=10.9) and Solaris 10 lack support for linkat while newer
-                    // versions have it. We want to use linkat if it is available, so we use weak!
-                    // to check. `linkat` is preferable to `link` because it gives us a flag to
-                    // specify how symlinks should be handled. We pass 0 as the flags argument,
-                    // meaning it shouldn't follow symlinks.
-                    weak!(fn linkat(c_int, *const c_char, c_int, *const c_char, c_int) -> c_int);
-
-                    if let Some(f) = linkat.get() {
-                        cvt(unsafe { f(libc::AT_FDCWD, original.as_ptr(), libc::AT_FDCWD, link.as_ptr(), 0) })?;
-                    } else {
-                        cvt(unsafe { libc::link(original.as_ptr(), link.as_ptr()) })?;
-                    };
                 } else {
                     // Where we can, use `linkat` instead of `link`; see the comment above
                     // this one for details on why.

src/tools/run-make-support/src/command.rs

@@ -6,7 +6,7 @@ use std::path::Path;
 use std::process::{Command as StdCommand, ExitStatus, Output, Stdio};
 
 use crate::drop_bomb::DropBomb;
-use crate::{assert_not_contains, handle_failed_output};
+use crate::{assert_contains, assert_not_contains, handle_failed_output};
 
 /// This is a custom command wrapper that simplifies working with commands and makes it easier to
 /// ensure that we check the exit status of executed processes.
@@ -170,6 +170,12 @@ impl CompletedProcess {
         self
     }
 
+    #[track_caller]
+    pub fn assert_stdout_contains<S: AsRef<str>>(self, needle: S) -> Self {
+        assert_contains(&self.stdout_utf8(), needle.as_ref());
+        self
+    }
+
     #[track_caller]
     pub fn assert_stdout_not_contains<S: AsRef<str>>(&self, needle: S) -> &Self {
         assert_not_contains(&self.stdout_utf8(), needle.as_ref());
@@ -185,7 +191,7 @@ impl CompletedProcess {
 
     #[track_caller]
     pub fn assert_stderr_contains<S: AsRef<str>>(&self, needle: S) -> &Self {
-        assert!(self.stderr_utf8().contains(needle.as_ref()));
+        assert_contains(&self.stderr_utf8(), needle.as_ref());
         self
     }
 

src/tools/run-make-support/src/lib.rs

@@ -332,6 +332,18 @@ pub fn read_dir<F: Fn(&Path)>(dir: impl AsRef<Path>, callback: F) {
     }
 }
 
+/// Check that `haystack` contains `needle`. Panic otherwise.
+#[track_caller]
+pub fn assert_contains(haystack: &str, needle: &str) {
+    if !haystack.contains(needle) {
+        eprintln!("=== HAYSTACK ===");
+        eprintln!("{}", haystack);
+        eprintln!("=== NEEDLE ===");
+        eprintln!("{}", needle);
+        panic!("needle was not found in haystack");
+    }
+}
+
 /// Check that `haystack` does not contain `needle`. Panic otherwise.
 #[track_caller]
 pub fn assert_not_contains(haystack: &str, needle: &str) {

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -1,5 +1,4 @@
 run-make/allocator-shim-circular-deps/Makefile
-run-make/allow-non-lint-warnings-cmdline/Makefile
 run-make/archive-duplicate-names/Makefile
 run-make/atomic-lock-free/Makefile
 run-make/branch-protection-check-IBT/Makefile

tests/run-make/allow-non-lint-warnings-cmdline/foo.rs → tests/ui/allow-non-lint-warnings.rs

@@ -1,3 +1,6 @@
+//@ compile-flags: -Awarnings
+//@ check-pass
+
 #[derive()]
 #[derive(Copy, Clone)]
 pub struct Foo;

tests/ui/generic-associated-types/static-lifetime-tip-with-default-type.rs

@@ -0,0 +1,26 @@
+//@ error-pattern: r#T: 'static
+//@ error-pattern: r#K: 'static
+//@ error-pattern: T: 'static=
+
+// https://github.com/rust-lang/rust/issues/124785
+
+struct Foo<T, K = i32>(&'static T, &'static K);
+//~^ ERROR: the parameter type `T` may not live long enough
+//~| ERROR: the parameter type `K` may not live long enough
+
+struct Bar<r#T, r#K = i32>(&'static r#T, &'static r#K);
+//~^ ERROR: the parameter type `T` may not live long enough
+//~| ERROR: the parameter type `K` may not live long enough
+
+struct Boo<T= i32>(&'static T);
+//~^ ERROR: the parameter type `T` may not live long enough
+
+struct Far<T
+= i32>(&'static T);
+//~^ ERROR: the parameter type `T` may not live long enough
+
+struct S<'a, K: 'a = i32>(&'static K);
+//~^ ERROR: lifetime parameter `'a` is never used
+//~| ERROR: the parameter type `K` may not live long enough
+
+fn main() {}

tests/ui/generic-associated-types/static-lifetime-tip-with-default-type.stderr

@@ -0,0 +1,110 @@
+error[E0310]: the parameter type `T` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:7:24
+   |
+LL | struct Foo<T, K = i32>(&'static T, &'static K);
+   |                        ^^^^^^^^^^
+   |                        |
+   |                        the parameter type `T` must be valid for the static lifetime...
+   |                        ...so that the reference type `&'static T` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Foo<T: 'static, K = i32>(&'static T, &'static K);
+   |             +++++++++
+
+error[E0310]: the parameter type `K` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:7:36
+   |
+LL | struct Foo<T, K = i32>(&'static T, &'static K);
+   |                                    ^^^^^^^^^^
+   |                                    |
+   |                                    the parameter type `K` must be valid for the static lifetime...
+   |                                    ...so that the reference type `&'static K` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Foo<T, K: 'static = i32>(&'static T, &'static K);
+   |                +++++++++
+
+error[E0310]: the parameter type `T` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:11:28
+   |
+LL | struct Bar<r#T, r#K = i32>(&'static r#T, &'static r#K);
+   |                            ^^^^^^^^^^^^
+   |                            |
+   |                            the parameter type `T` must be valid for the static lifetime...
+   |                            ...so that the reference type `&'static T` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Bar<r#T: 'static, r#K = i32>(&'static r#T, &'static r#K);
+   |               +++++++++
+
+error[E0310]: the parameter type `K` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:11:42
+   |
+LL | struct Bar<r#T, r#K = i32>(&'static r#T, &'static r#K);
+   |                                          ^^^^^^^^^^^^
+   |                                          |
+   |                                          the parameter type `K` must be valid for the static lifetime...
+   |                                          ...so that the reference type `&'static K` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Bar<r#T, r#K: 'static = i32>(&'static r#T, &'static r#K);
+   |                    +++++++++
+
+error[E0310]: the parameter type `T` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:15:20
+   |
+LL | struct Boo<T= i32>(&'static T);
+   |                    ^^^^^^^^^^
+   |                    |
+   |                    the parameter type `T` must be valid for the static lifetime...
+   |                    ...so that the reference type `&'static T` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Boo<T: 'static= i32>(&'static T);
+   |             +++++++++
+
+error[E0310]: the parameter type `T` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:19:8
+   |
+LL | = i32>(&'static T);
+   |        ^^^^^^^^^^
+   |        |
+   |        the parameter type `T` must be valid for the static lifetime...
+   |        ...so that the reference type `&'static T` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct Far<T: 'static
+   |             +++++++++
+
+error[E0310]: the parameter type `K` may not live long enough
+  --> $DIR/static-lifetime-tip-with-default-type.rs:22:27
+   |
+LL | struct S<'a, K: 'a = i32>(&'static K);
+   |                           ^^^^^^^^^^
+   |                           |
+   |                           the parameter type `K` must be valid for the static lifetime...
+   |                           ...so that the reference type `&'static K` does not outlive the data it points at
+   |
+help: consider adding an explicit lifetime bound
+   |
+LL | struct S<'a, K: 'a + 'static = i32>(&'static K);
+   |                    +++++++++
+
+error[E0392]: lifetime parameter `'a` is never used
+  --> $DIR/static-lifetime-tip-with-default-type.rs:22:10
+   |
+LL | struct S<'a, K: 'a = i32>(&'static K);
+   |          ^^ unused lifetime parameter
+   |
+   = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`
+
+error: aborting due to 8 previous errors
+
+Some errors have detailed explanations: E0310, E0392.
+For more information about an error, try `rustc --explain E0310`.