Auto merge of rust-lang#85518 - GuillaumeGomez:rollup-mq4ohfy, r=GuillaumeGomez

Rollup of 5 pull requests

Successful merges:

 - rust-lang#85275 (Move `std::memchr` to `sys_common`)
 - rust-lang#85326 (bootstrap: ensure host std when cross-compiling tools, fixes rust-lang#85320)
 - rust-lang#85375 (Fix missing lifetimes diagnostics after rust-lang#83759)
 - rust-lang#85507 (Extend escape key check)
 - rust-lang#85509 (Prevent tab title to "null" if the URL is a search one)

Failed merges:

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

Author: bors

compiler/rustc_typeck/src/structured_errors/wrong_number_of_generic_args.rs

@@ -509,44 +509,23 @@ impl<'a, 'tcx> WrongNumberOfGenericArgs<'a, 'tcx> {
             }
 
             AngleBrackets::Available => {
-                // angle brackets exist, so we insert missing arguments after the existing args
-
-                assert!(!self.gen_args.args.is_empty());
-
-                if self.num_provided_lifetime_args() > 0 {
-                    let last_lt_arg_span = self.gen_args.args
-                        [self.num_provided_lifetime_args() - 1]
-                        .span()
-                        .shrink_to_hi();
-                    let source_map = self.tcx.sess.source_map();
-
-                    if let Ok(last_gen_arg) = source_map.span_to_snippet(last_lt_arg_span) {
-                        let sugg = format!("{}, {}", last_gen_arg, suggested_args);
-
-                        err.span_suggestion_verbose(
-                            last_lt_arg_span,
-                            &msg,
-                            sugg,
-                            Applicability::HasPlaceholders,
-                        );
-                    }
+                let (sugg_span, is_first) = if self.num_provided_lifetime_args() == 0 {
+                    (self.gen_args.span().unwrap().shrink_to_lo(), true)
                 } else {
-                    // Non-lifetime arguments included in `gen_args` -> insert missing lifetimes before
-                    // existing arguments
-                    let first_arg_span = self.gen_args.args[0].span().shrink_to_lo();
-                    let source_map = self.tcx.sess.source_map();
-
-                    if let Ok(first_gen_arg) = source_map.span_to_snippet(first_arg_span) {
-                        let sugg = format!("{}, {}", suggested_args, first_gen_arg);
-
-                        err.span_suggestion_verbose(
-                            first_arg_span,
-                            &msg,
-                            sugg,
-                            Applicability::HasPlaceholders,
-                        );
-                    }
-                }
+                    let last_lt = &self.gen_args.args[self.num_provided_lifetime_args() - 1];
+                    (last_lt.span().shrink_to_hi(), false)
+                };
+                let has_non_lt_args = self.num_provided_type_or_const_args() != 0;
+                let has_bindings = !self.gen_args.bindings.is_empty();
+
+                let sugg_prefix = if is_first { "" } else { ", " };
+                let sugg_suffix =
+                    if is_first && (has_non_lt_args || has_bindings) { ", " } else { "" };
+
+                let sugg = format!("{}{}{}", sugg_prefix, suggested_args, sugg_suffix);
+                debug!("sugg: {:?}", sugg);
+
+                err.span_suggestion_verbose(sugg_span, &msg, sugg, Applicability::HasPlaceholders);
             }
             AngleBrackets::Implied => {
                 // We never encounter missing lifetimes in situations in which lifetimes are elided

library/std/src/ffi/c_str.rs

@@ -10,7 +10,6 @@ use crate::error::Error;
 use crate::fmt::{self, Write};
 use crate::io;
 use crate::mem;
-use crate::memchr;
 use crate::num::NonZeroU8;
 use crate::ops;
 use crate::os::raw::c_char;
@@ -20,6 +19,7 @@ use crate::slice;
 use crate::str::{self, Utf8Error};
 use crate::sync::Arc;
 use crate::sys;
+use crate::sys_common::memchr;
 
 /// A type representing an owned, C-compatible, nul-terminated string with no nul bytes in the
 /// middle.

library/std/src/io/buffered/linewritershim.rs

@@ -1,5 +1,5 @@
 use crate::io::{self, BufWriter, IoSlice, Write};
-use crate::memchr;
+use crate::sys_common::memchr;
 
 /// Private helper struct for implementing the line-buffered writing logic.
 /// This shim temporarily wraps a BufWriter, and uses its internals to

library/std/src/io/mod.rs

@@ -253,12 +253,12 @@ mod tests;
 
 use crate::cmp;
 use crate::fmt;
-use crate::memchr;
 use crate::ops::{Deref, DerefMut};
 use crate::ptr;
 use crate::slice;
 use crate::str;
 use crate::sys;
+use crate::sys_common::memchr;
 
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use self::buffered::IntoInnerError;

library/std/src/lib.rs

@@ -530,7 +530,6 @@ mod sys;
 pub mod alloc;
 
 // Private support modules
-mod memchr;
 mod panicking;
 
 // The runtime entry point and a few unstable public functions used by the

library/std/src/sys/hermit/os.rs

@@ -4,11 +4,11 @@ use crate::ffi::{CStr, OsStr, OsString};
 use crate::fmt;
 use crate::io;
 use crate::marker::PhantomData;
-use crate::memchr;
 use crate::path::{self, PathBuf};
 use crate::str;
 use crate::sync::Mutex;
 use crate::sys::hermit::abi;
+use crate::sys::memchr;
 use crate::sys::unsupported;
 use crate::sys_common::os_str_bytes::*;
 use crate::vec;

library/std/src/sys/unix/os.rs

@@ -13,13 +13,13 @@ use crate::fmt;
 use crate::io;
 use crate::iter;
 use crate::mem;
-use crate::memchr;
 use crate::path::{self, PathBuf};
 use crate::ptr;
 use crate::slice;
 use crate::str;
 use crate::sys::cvt;
 use crate::sys::fd;
+use crate::sys::memchr;
 use crate::sys::rwlock::{RWLockReadGuard, StaticRWLock};
 use crate::sys_common::mutex::{StaticMutex, StaticMutexGuard};
 use crate::vec;

library/std/src/memchr.rs renamed to library/std/src/sys_common/memchr.rs

@@ -1,6 +1,8 @@
 // Original implementation taken from rust-memchr.
 // Copyright 2015 Andrew Gallant, bluss and Nicolas Koch
 
+use crate::sys::memchr as sys;
+
 #[cfg(test)]
 mod tests;
 
@@ -25,7 +27,7 @@ mod tests;
 /// ```
 #[inline]
 pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> {
-    crate::sys::memchr::memchr(needle, haystack)
+    sys::memchr(needle, haystack)
 }
 
 /// A safe interface to `memrchr`.
@@ -45,5 +47,5 @@ pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> {
 /// ```
 #[inline]
 pub fn memrchr(needle: u8, haystack: &[u8]) -> Option<usize> {
-    crate::sys::memchr::memrchr(needle, haystack)
+    sys::memrchr(needle, haystack)
 }

library/std/src/memchr/tests.rs renamed to library/std/src/sys_common/memchr/tests.rs

@@ -25,6 +25,7 @@ pub mod bytestring;
 pub mod condvar;
 pub mod fs;
 pub mod io;
+pub mod memchr;
 pub mod mutex;
 // `doc` is required because `sys/mod.rs` imports `unix/ext/mod.rs` on Windows
 // when generating documentation.