Auto merge of rust-lang#2618 - RalfJung:rustup, r=RalfJung

Rustup

build.rs

@@ -4,5 +4,5 @@ fn main() {
     // Re-export the TARGET environment variable so it can
     // be accessed by miri.
     let target = std::env::var("TARGET").unwrap();
-    println!("cargo:rustc-env=TARGET={}", target);
+    println!("cargo:rustc-env=TARGET={target}");
 }

cargo-miri/src/phases.rs

@@ -34,7 +34,7 @@ Examples:
 "#;
 
 fn show_help() {
-    println!("{}", CARGO_MIRI_HELP);
+    println!("{CARGO_MIRI_HELP}");
 }
 
 fn show_version() {
@@ -52,7 +52,7 @@ fn forward_patched_extern_arg(args: &mut impl Iterator<Item = String>, cmd: &mut
     let path = args.next().expect("`--extern` should be followed by a filename");
     if let Some(lib) = path.strip_suffix(".rlib") {
         // If this is an rlib, make it an rmeta.
-        cmd.arg(format!("{}.rmeta", lib));
+        cmd.arg(format!("{lib}.rmeta"));
     } else {
         // Some other extern file (e.g. a `.so`). Forward unchanged.
         cmd.arg(path);
@@ -336,7 +336,7 @@ pub fn phase_rustc(mut args: impl Iterator<Item = String>, phase: RustcPhase) {
                     "[cargo-miri rustc inside rustdoc] captured input:\n{}",
                     std::str::from_utf8(&env.stdin).unwrap()
                 );
-                eprintln!("[cargo-miri rustc inside rustdoc] going to run:\n{:?}", cmd);
+                eprintln!("[cargo-miri rustc inside rustdoc] going to run:\n{cmd:?}");
             }
 
             exec_with_pipe(cmd, &env.stdin, format!("{}.stdin", out_filename("", "").display()));
@@ -374,7 +374,7 @@ pub fn phase_rustc(mut args: impl Iterator<Item = String>, phase: RustcPhase) {
                         val.push("metadata");
                     }
                 }
-                cmd.arg(format!("{}={}", emit_flag, val.join(",")));
+                cmd.arg(format!("{emit_flag}={}", val.join(",")));
             } else if arg == "--extern" {
                 // Patch `--extern` filenames, since Cargo sometimes passes stub `.rlib` files:
                 // https://github.com/rust-lang/miri/issues/1705
@@ -535,7 +535,7 @@ pub fn phase_runner(mut binary_args: impl Iterator<Item = String>, phase: Runner
     // Run it.
     debug_cmd("[cargo-miri runner]", verbose, &cmd);
     match phase {
-        RunnerPhase::Rustdoc => exec_with_pipe(cmd, &info.stdin, format!("{}.stdin", binary)),
+        RunnerPhase::Rustdoc => exec_with_pipe(cmd, &info.stdin, format!("{binary}.stdin")),
         RunnerPhase::Cargo => exec(cmd),
     }
 }

cargo-miri/src/util.rs

@@ -83,7 +83,7 @@ pub fn escape_for_toml(s: &str) -> String {
     // We want to surround this string in quotes `"`. So we first escape all quotes,
     // and also all backslashes (that are used to escape quotes).
     let s = s.replace('\\', r#"\\"#).replace('"', r#"\""#);
-    format!("\"{}\"", s)
+    format!("\"{s}\"")
 }
 
 /// Returns the path to the `miri` binary
@@ -175,7 +175,7 @@ pub fn ask_to_run(mut cmd: Command, ask: bool, text: &str) {
     let is_ci = env::var_os("CI").is_some() || env::var_os("TF_BUILD").is_some();
     if ask && !is_ci {
         let mut buf = String::new();
-        print!("I will run `{:?}` to {}. Proceed? [Y/n] ", cmd, text);
+        print!("I will run `{cmd:?}` to {text}. Proceed? [Y/n] ");
         io::stdout().flush().unwrap();
         io::stdin().read_line(&mut buf).unwrap();
         match buf.trim().to_lowercase().as_ref() {
@@ -185,10 +185,10 @@ pub fn ask_to_run(mut cmd: Command, ask: bool, text: &str) {
             a => show_error!("invalid answer `{}`", a),
         };
     } else {
-        eprintln!("Running `{:?}` to {}.", cmd, text);
+        eprintln!("Running `{cmd:?}` to {text}.");
     }
 
-    if cmd.status().unwrap_or_else(|_| panic!("failed to execute {:?}", cmd)).success().not() {
+    if cmd.status().unwrap_or_else(|_| panic!("failed to execute {cmd:?}")).success().not() {
         show_error!("failed to {}", text);
     }
 }
@@ -276,12 +276,12 @@ pub fn debug_cmd(prefix: &str, verbose: usize, cmd: &Command) {
         // Print only what has been changed for this `cmd`.
         for (var, val) in cmd.get_envs() {
             if let Some(val) = val {
-                writeln!(out, "{}={:?} \\", var.to_string_lossy(), val).unwrap();
+                writeln!(out, "{}={val:?} \\", var.to_string_lossy()).unwrap();
             } else {
                 writeln!(out, "--unset={}", var.to_string_lossy()).unwrap();
             }
         }
     }
     write!(out, "{cmd:?}").unwrap();
-    eprintln!("{}", out);
+    eprintln!("{out}");
 }

rust-version

@@ -1 +1 @@
-56f132565eb31eeb9ec7e1800a6ab2ca354e710e
+85d089b41e2a0c0f07ab34f6c5a7c451389f25e6

src/bin/miri.rs

@@ -192,7 +192,7 @@ fn init_late_loggers(tcx: TyCtxt<'_>) {
             if log::Level::from_str(&var).is_ok() {
                 env::set_var(
                     "RUSTC_LOG",
-                    &format!(
+                    format!(
                         "rustc_middle::mir::interpret={0},rustc_const_eval::interpret={0}",
                         var
                     ),
@@ -243,7 +243,7 @@ fn host_sysroot() -> Option<String> {
                     )
                 }
             }
-            format!("{}/toolchains/{}", home, toolchain)
+            format!("{home}/toolchains/{toolchain}")
         }
         _ => option_env!("RUST_SYSROOT")
             .unwrap_or_else(|| {
@@ -330,7 +330,7 @@ fn main() {
         } else if crate_kind == "host" {
             false
         } else {
-            panic!("invalid `MIRI_BE_RUSTC` value: {:?}", crate_kind)
+            panic!("invalid `MIRI_BE_RUSTC` value: {crate_kind:?}")
         };
 
         // We cannot use `rustc_driver::main` as we need to adjust the CLI arguments.

src/concurrency/vector_clock.rs

@@ -399,7 +399,7 @@ mod tests {
 
         //Test partial_cmp
         let compare = l.partial_cmp(&r);
-        assert_eq!(compare, o, "Invalid comparison\n l: {:?}\n r: {:?}", l, r);
+        assert_eq!(compare, o, "Invalid comparison\n l: {l:?}\n r: {r:?}");
         let alt_compare = r.partial_cmp(&l);
         assert_eq!(
             alt_compare,

src/diagnostics.rs

@@ -263,7 +263,7 @@ pub fn report_error<'tcx, 'mir>(
     msg.insert(0, e.to_string());
     report_msg(
         DiagLevel::Error,
-        &if let Some(title) = title { format!("{}: {}", title, msg[0]) } else { msg[0].clone() },
+        &if let Some(title) = title { format!("{title}: {}", msg[0]) } else { msg[0].clone() },
         msg,
         vec![],
         helps,

src/helpers.rs

@@ -107,7 +107,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
     /// Gets an instance for a path.
     fn resolve_path(&self, path: &[&str]) -> ty::Instance<'tcx> {
         self.try_resolve_path(path)
-            .unwrap_or_else(|| panic!("failed to find required Rust item: {:?}", path))
+            .unwrap_or_else(|| panic!("failed to find required Rust item: {path:?}"))
     }
 
     /// Evaluates the scalar at the specified path. Returns Some(val)
@@ -505,7 +505,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
             RejectOpWith::WarningWithoutBacktrace => {
                 this.tcx
                     .sess
-                    .warn(&format!("{} was made to return an error due to isolation", op_name));
+                    .warn(format!("{op_name} was made to return an error due to isolation"));
                 Ok(())
             }
             RejectOpWith::Warning => {

src/machine.rs

@@ -191,12 +191,12 @@ impl interpret::Provenance for Provenance {
             Provenance::Concrete { alloc_id, sb } => {
                 // Forward `alternate` flag to `alloc_id` printing.
                 if f.alternate() {
-                    write!(f, "[{:#?}]", alloc_id)?;
+                    write!(f, "[{alloc_id:#?}]")?;
                 } else {
-                    write!(f, "[{:?}]", alloc_id)?;
+                    write!(f, "[{alloc_id:?}]")?;
                 }
                 // Print Stacked Borrows tag.
-                write!(f, "{:?}", sb)?;
+                write!(f, "{sb:?}")?;
             }
             Provenance::Wildcard => {
                 write!(f, "[wildcard]")?;

src/range_map.rs

@@ -40,7 +40,7 @@ impl<T> RangeMap<T> {
         let mut left = 0usize; // inclusive
         let mut right = self.v.len(); // exclusive
         loop {
-            debug_assert!(left < right, "find_offset: offset {} is out-of-bounds", offset);
+            debug_assert!(left < right, "find_offset: offset {offset} is out-of-bounds");
             let candidate = left.checked_add(right).unwrap() / 2;
             let elem = &self.v[candidate];
             if offset < elem.range.start {

src/shims/foreign_items.rs

@@ -321,7 +321,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                     return Ok(Some(body));
                 }
 
-                this.handle_unsupported(format!("can't call foreign function: {}", link_name))?;
+                this.handle_unsupported(format!("can't call foreign function: {link_name}"))?;
                 return Ok(None);
             }
         }

src/shims/intrinsics/simd.rs

@@ -437,13 +437,13 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                     let val = match (op.layout.ty.kind(), dest.layout.ty.kind()) {
                         // Int-to-(int|float): always safe
                         (ty::Int(_) | ty::Uint(_), ty::Int(_) | ty::Uint(_) | ty::Float(_)) =>
-                            this.misc_cast(&op, dest.layout.ty)?,
+                            this.int_to_int_or_float(&op, dest.layout.ty)?,
                         // Float-to-float: always safe
                         (ty::Float(_), ty::Float(_)) =>
-                            this.misc_cast(&op, dest.layout.ty)?,
+                            this.float_to_float_or_int(&op, dest.layout.ty)?,
                         // Float-to-int in safe mode
                         (ty::Float(_), ty::Int(_) | ty::Uint(_)) if safe_cast =>
-                            this.misc_cast(&op, dest.layout.ty)?,
+                            this.float_to_float_or_int(&op, dest.layout.ty)?,
                         // Float-to-int in unchecked mode
                         (ty::Float(FloatTy::F32), ty::Int(_) | ty::Uint(_)) if !safe_cast =>
                             this.float_to_int_unchecked(op.to_scalar().to_f32()?, dest.layout.ty)?.into(),

src/shims/unix/fs.rs

@@ -621,7 +621,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
             return Ok(-1);
         }
 
-        let fd = options.open(&path).map(|file| {
+        let fd = options.open(path).map(|file| {
             let fh = &mut this.machine.file_handler;
             fh.insert_fd(Box::new(FileHandle { file, writable }))
         });
@@ -1862,7 +1862,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
 
             let possibly_unique = std::env::temp_dir().join::<PathBuf>(p.into());
 
-            let file = fopts.open(&possibly_unique);
+            let file = fopts.open(possibly_unique);
 
             match file {
                 Ok(f) => {

src/shims/unix/linux/foreign_items.rs

@@ -126,7 +126,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
                         futex(this, &args[1..], dest)?;
                     }
                     id => {
-                        this.handle_unsupported(format!("can't execute syscall with ID {}", id))?;
+                        this.handle_unsupported(format!("can't execute syscall with ID {id}"))?;
                         return Ok(EmulateByNameResult::AlreadyJumped);
                     }
                 }

src/stacked_borrows/diagnostics.rs

@@ -86,12 +86,12 @@ impl Invalidation {
 impl fmt::Display for InvalidationCause {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            InvalidationCause::Access(kind) => write!(f, "{}", kind),
+            InvalidationCause::Access(kind) => write!(f, "{kind}"),
             InvalidationCause::Retag(perm, kind) =>
                 if *kind == RetagCause::FnEntry {
-                    write!(f, "{:?} FnEntry retag", perm)
+                    write!(f, "{perm:?} FnEntry retag")
                 } else {
-                    write!(f, "{:?} retag", perm)
+                    write!(f, "{perm:?} retag")
                 },
         }
     }
@@ -339,7 +339,7 @@ impl<'span, 'history, 'ecx, 'mir, 'tcx> DiagnosticCx<'span, 'history, 'ecx, 'mir
                 // this allocation.
                 if self.history.base.0.tag() == tag {
                     Some((
-                        format!("{:?} was created here, as the base tag for {:?}", tag, self.history.id),
+                        format!("{tag:?} was created here, as the base tag for {:?}", self.history.id),
                         self.history.base.1.data()
                     ))
                 } else {
@@ -381,7 +381,7 @@ impl<'span, 'history, 'ecx, 'mir, 'tcx> DiagnosticCx<'span, 'history, 'ecx, 'mir
             self.offset.bytes(),
         );
         err_sb_ub(
-            format!("{}{}", action, error_cause(stack, op.orig_tag)),
+            format!("{action}{}", error_cause(stack, op.orig_tag)),
             Some(operation_summary(&op.cause.summary(), self.history.id, op.range)),
             op.orig_tag.and_then(|orig_tag| self.get_logs_relevant_to(orig_tag, None)),
         )
@@ -401,7 +401,7 @@ impl<'span, 'history, 'ecx, 'mir, 'tcx> DiagnosticCx<'span, 'history, 'ecx, 'mir
             offset = self.offset.bytes(),
         );
         err_sb_ub(
-            format!("{}{}", action, error_cause(stack, op.tag)),
+            format!("{action}{}", error_cause(stack, op.tag)),
             Some(operation_summary("an access", self.history.id, op.range)),
             op.tag.and_then(|tag| self.get_logs_relevant_to(tag, None)),
         )

src/stacked_borrows/mod.rs

@@ -1153,7 +1153,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriInterpCxExt<'mir, 'tcx> {
         let alloc_extra = this.get_alloc_extra(alloc_id)?;
         let stacks = alloc_extra.stacked_borrows.as_ref().unwrap().borrow();
         for (range, stack) in stacks.stacks.iter_all() {
-            print!("{:?}: [", range);
+            print!("{range:?}: [");
             for i in 0..stack.len() {
                 let item = stack.get(i).unwrap();
                 print!(" {:?}{:?}", item.perm(), item.tag());