Rollup of 5 pull requests

Cargo.lock

@@ -82,12 +82,6 @@ dependencies = [
  "url 2.2.2",
 ]
 
-[[package]]
-name = "annotate-snippets"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d78ea013094e5ea606b1c05fe35f1dd7ea1eb1ea259908d040b25bd5ec677ee5"
-
 [[package]]
 name = "annotate-snippets"
 version = "0.9.1"
@@ -3862,7 +3856,7 @@ dependencies = [
 name = "rustc_errors"
 version = "0.0.0"
 dependencies = [
- "annotate-snippets 0.8.0",
+ "annotate-snippets",
  "atty",
  "rustc_data_structures",
  "rustc_error_messages",
@@ -4114,7 +4108,7 @@ dependencies = [
 name = "rustc_macros"
 version = "0.1.0"
 dependencies = [
- "annotate-snippets 0.8.0",
+ "annotate-snippets",
  "fluent-bundle",
  "fluent-syntax",
  "proc-macro2",
@@ -4729,7 +4723,7 @@ dependencies = [
 name = "rustfmt-nightly"
 version = "1.5.1"
 dependencies = [
- "annotate-snippets 0.9.1",
+ "annotate-snippets",
  "anyhow",
  "bytecount",
  "cargo_metadata 0.14.0",

compiler/rustc_errors/Cargo.toml

@@ -18,7 +18,7 @@ rustc_lint_defs = { path = "../rustc_lint_defs" }
 unicode-width = "0.1.4"
 atty = "0.2"
 termcolor = "1.0"
-annotate-snippets = "0.8.0"
+annotate-snippets = "0.9"
 termize = "0.1.1"
 serde = { version = "1.0.125", features = ["derive"] }
 serde_json = "1.0.59"

compiler/rustc_errors/src/annotate_snippet_emitter_writer.rs

@@ -183,7 +183,11 @@ impl AnnotateSnippetEmitterWriter {
                     annotation_type: annotation_type_for_level(*level),
                 }),
                 footer: vec![],
-                opt: FormatOptions { color: true, anonymized_line_numbers: self.ui_testing },
+                opt: FormatOptions {
+                    color: true,
+                    anonymized_line_numbers: self.ui_testing,
+                    margin: None,
+                },
                 slices: annotated_files
                     .iter()
                     .map(|(source, line_index, annotations)| {

compiler/rustc_macros/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-annotate-snippets = "0.8.0"
+annotate-snippets = "0.9"
 fluent-bundle = "0.15.2"
 fluent-syntax = "0.11"
 synstructure = "0.12.1"

compiler/rustc_typeck/src/check/coercion.rs

@@ -1493,6 +1493,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
                     // type)
                     (self.final_ty.unwrap_or(self.expected_ty), expression_ty)
                 };
+                let (expected, found) = fcx.resolve_vars_if_possible((expected, found));
 
                 let mut err;
                 let mut unsized_return = false;
@@ -1695,9 +1696,30 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
             );
         }
 
-        if let (Some(sp), Some(fn_output)) = (fcx.ret_coercion_span.get(), fn_output) {
+        let ret_coercion_span = fcx.ret_coercion_span.get();
+
+        if let Some(sp) = ret_coercion_span
+            // If the closure has an explicit return type annotation, or if
+            // the closure's return type has been inferred from outside
+            // requirements (such as an Fn* trait bound), then a type error
+            // may occur at the first return expression we see in the closure
+            // (if it conflicts with the declared return type). Skip adding a
+            // note in this case, since it would be incorrect.
+            && !fcx.return_type_pre_known
+        {
+            err.span_note(
+                sp,
+                &format!(
+                    "return type inferred to be `{}` here",
+                    expected
+                ),
+            );
+        }
+
+        if let (Some(sp), Some(fn_output)) = (ret_coercion_span, fn_output) {
             self.add_impl_trait_explanation(&mut err, cause, fcx, expected, sp, fn_output);
         }
+
         err
     }
 

compiler/rustc_typeck/src/check/demand.rs

@@ -45,7 +45,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         self.note_type_is_not_clone(err, expected, expr_ty, expr);
         self.note_need_for_fn_pointer(err, expected, expr_ty);
         self.note_internal_mutation_in_method(err, expr, expected, expr_ty);
-        self.report_closure_inferred_return_type(err, expected);
     }
 
     // Requires that the two types unify, and prints an error message if
@@ -1418,25 +1417,4 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             _ => false,
         }
     }
-
-    // Report the type inferred by the return statement.
-    fn report_closure_inferred_return_type(&self, err: &mut Diagnostic, expected: Ty<'tcx>) {
-        if let Some(sp) = self.ret_coercion_span.get()
-            // If the closure has an explicit return type annotation, or if
-            // the closure's return type has been inferred from outside
-            // requirements (such as an Fn* trait bound), then a type error
-            // may occur at the first return expression we see in the closure
-            // (if it conflicts with the declared return type). Skip adding a
-            // note in this case, since it would be incorrect.
-            && !self.return_type_pre_known
-        {
-            err.span_note(
-                sp,
-                &format!(
-                    "return type inferred to be `{}` here",
-                    self.resolve_vars_if_possible(expected)
-                ),
-            );
-        }
-    }
 }

library/core/src/ptr/const_ptr.rs

@@ -1336,11 +1336,8 @@ impl<T: ?Sized> *const T {
             panic!("is_aligned_to: align is not a power-of-two");
         }
 
-        // SAFETY: `is_power_of_two()` will return `false` for zero.
-        unsafe { core::intrinsics::assume(align != 0) };
-
         // Cast is needed for `T: !Sized`
-        self.cast::<u8>().addr() % align == 0
+        self.cast::<u8>().addr() & align - 1 == 0
     }
 }
 

library/core/src/ptr/mut_ptr.rs

@@ -1614,11 +1614,8 @@ impl<T: ?Sized> *mut T {
             panic!("is_aligned_to: align is not a power-of-two");
         }
 
-        // SAFETY: `is_power_of_two()` will return `false` for zero.
-        unsafe { core::intrinsics::assume(align != 0) };
-
         // Cast is needed for `T: !Sized`
-        self.cast::<u8>().addr() % align == 0
+        self.cast::<u8>().addr() & align - 1 == 0
     }
 }
 

library/core/src/str/mod.rs

@@ -2353,7 +2353,7 @@ impl str {
     #[inline]
     pub fn is_ascii(&self) -> bool {
         // We can treat each byte as character here: all multibyte characters
-        // start with a byte that is not in the ascii range, so we will stop
+        // start with a byte that is not in the ASCII range, so we will stop
         // there already.
         self.as_bytes().is_ascii()
     }

library/std/src/sys/windows/c.rs

@@ -1250,19 +1250,21 @@ compat_fn_with_fallback! {
     }
 }
 
-compat_fn_optional! {
+compat_fn_with_fallback! {
     pub static SYNCH_API: &CStr = ansi_str!("api-ms-win-core-synch-l1-2-0");
-
-    // >= Windows 8 / Server 2012
-    // https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitonaddress
-    pub fn WaitOnAddress(
-        Address: LPVOID,
-        CompareAddress: LPVOID,
-        AddressSize: SIZE_T,
-        dwMilliseconds: DWORD
-    ) -> BOOL;
-    pub fn WakeByAddressSingle(Address: LPVOID) -> ();
+    #[allow(unused)]
+    fn WakeByAddressSingle(Address: LPVOID) -> () {
+        // This fallback is currently tightly coupled to its use in Parker::unpark.
+        //
+        // FIXME: If `WakeByAddressSingle` needs to be used anywhere other than
+        // Parker::unpark then this fallback will be wrong and will need to be decoupled.
+        crate::sys::windows::thread_parker::unpark_keyed_event(Address)
+    }
 }
+pub use crate::sys::compat::WaitOnAddress;
+// Change exported name of `WakeByAddressSingle` to make the strange fallback
+// behaviour clear.
+pub use WakeByAddressSingle::call as wake_by_address_single_or_unpark_keyed_event;
 
 compat_fn_with_fallback! {
     pub static NTDLL: &CStr = ansi_str!("ntdll");