Rollup of 7 pull requests

Cargo.lock

@@ -2113,7 +2113,6 @@ dependencies = [
  "fs-err",
  "getopts",
  "jsonpath_lib",
- "once_cell",
  "regex",
  "serde_json",
  "shlex",
@@ -2232,7 +2231,6 @@ name = "linkchecker"
 version = "0.1.0"
 dependencies = [
  "html5ever",
- "once_cell",
  "regex",
 ]
 
@@ -2491,7 +2489,6 @@ dependencies = [
  "directories",
  "getrandom",
  "jemalloc-sys",
- "lazy_static",
  "libc",
  "libffi",
  "libloading",
@@ -4791,12 +4788,10 @@ dependencies = [
  "arrayvec",
  "askama",
  "base64",
- "byteorder",
  "expect-test",
  "indexmap",
  "itertools 0.12.1",
  "minifier",
- "once_cell",
  "regex",
  "rustdoc-json-types",
  "serde",
@@ -5351,7 +5346,6 @@ version = "0.1.0"
 dependencies = [
  "build_helper",
  "glob",
- "once_cell",
 ]
 
 [[package]]
@@ -5596,7 +5590,6 @@ version = "0.1.0"
 dependencies = [
  "cargo_metadata 0.15.4",
  "ignore",
- "lazy_static",
  "miropt-test-tools",
  "regex",
  "rustc-hash",

compiler/rustc_ast_pretty/src/pprust/state/expr.rs

@@ -488,7 +488,7 @@ impl<'a> State<'a> {
                         self.space();
                     }
                     MatchKind::Postfix => {
-                        self.print_expr_as_cond(expr);
+                        self.print_expr_maybe_paren(expr, parser::PREC_POSTFIX, fixup);
                         self.word_nbsp(".match");
                     }
                 }

compiler/rustc_driver_impl/src/lib.rs

@@ -971,7 +971,7 @@ Available lint options:
 
     let lint_store = unerased_lint_store(sess);
     let (loaded, builtin): (Vec<_>, _) =
-        lint_store.get_lints().iter().cloned().partition(|&lint| lint.is_loaded);
+        lint_store.get_lints().iter().cloned().partition(|&lint| lint.is_externally_loaded);
     let loaded = sort_lints(sess, loaded);
     let builtin = sort_lints(sess, builtin);
 

compiler/rustc_lint/src/context.rs

@@ -110,7 +110,7 @@ struct LintAlias {
 
 struct LintGroup {
     lint_ids: Vec<LintId>,
-    is_loaded: bool,
+    is_externally_loaded: bool,
     depr: Option<LintAlias>,
 }
 
@@ -159,7 +159,9 @@ impl LintStore {
                 // Don't display deprecated lint groups.
                 depr.is_none()
             })
-            .map(|(k, LintGroup { lint_ids, is_loaded, .. })| (*k, lint_ids.clone(), *is_loaded))
+            .map(|(k, LintGroup { lint_ids, is_externally_loaded, .. })| {
+                (*k, lint_ids.clone(), *is_externally_loaded)
+            })
     }
 
     pub fn register_early_pass(
@@ -218,7 +220,7 @@ impl LintStore {
                         .entry(edition.lint_name())
                         .or_insert(LintGroup {
                             lint_ids: vec![],
-                            is_loaded: lint.is_loaded,
+                            is_externally_loaded: lint.is_externally_loaded,
                             depr: None,
                         })
                         .lint_ids
@@ -231,7 +233,7 @@ impl LintStore {
                         .entry("future_incompatible")
                         .or_insert(LintGroup {
                             lint_ids: vec![],
-                            is_loaded: lint.is_loaded,
+                            is_externally_loaded: lint.is_externally_loaded,
                             depr: None,
                         })
                         .lint_ids
@@ -246,29 +248,29 @@ impl LintStore {
             alias,
             LintGroup {
                 lint_ids: vec![],
-                is_loaded: false,
+                is_externally_loaded: false,
                 depr: Some(LintAlias { name: lint_name, silent: true }),
             },
         );
     }
 
     pub fn register_group(
         &mut self,
-        is_loaded: bool,
+        is_externally_loaded: bool,
         name: &'static str,
         deprecated_name: Option<&'static str>,
         to: Vec<LintId>,
     ) {
         let new = self
             .lint_groups
-            .insert(name, LintGroup { lint_ids: to, is_loaded, depr: None })
+            .insert(name, LintGroup { lint_ids: to, is_externally_loaded, depr: None })
             .is_none();
         if let Some(deprecated) = deprecated_name {
             self.lint_groups.insert(
                 deprecated,
                 LintGroup {
                     lint_ids: vec![],
-                    is_loaded,
+                    is_externally_loaded,
                     depr: Some(LintAlias { name, silent: false }),
                 },
             );

compiler/rustc_lint/src/unused.rs

@@ -176,6 +176,7 @@ impl<'tcx> LateLintPass<'tcx> for UnusedResults {
                 | hir::BinOpKind::Shr => Some("bitwise operation"),
             },
             hir::ExprKind::AddrOf(..) => Some("borrow"),
+            hir::ExprKind::OffsetOf(..) => Some("`offset_of` call"),
             hir::ExprKind::Unary(..) => Some("unary operation"),
             _ => None,
         };

compiler/rustc_lint_defs/src/lib.rs

@@ -323,7 +323,8 @@ pub struct Lint {
 
     pub future_incompatible: Option<FutureIncompatibleInfo>,
 
-    pub is_loaded: bool,
+    /// `true` if this lint is being loaded by another tool (e.g. Clippy).
+    pub is_externally_loaded: bool,
 
     /// `Some` if this lint is feature gated, otherwise `None`.
     pub feature_gate: Option<Symbol>,
@@ -468,7 +469,7 @@ impl Lint {
             default_level: Level::Forbid,
             desc: "",
             edition_lint_opts: None,
-            is_loaded: false,
+            is_externally_loaded: false,
             report_in_external_macro: false,
             future_incompatible: None,
             feature_gate: None,
@@ -817,7 +818,7 @@ macro_rules! declare_lint {
             name: stringify!($NAME),
             default_level: $crate::$Level,
             desc: $desc,
-            is_loaded: false,
+            is_externally_loaded: false,
             $($v: true,)*
             $(feature_gate: Some($gate),)?
             $(future_incompatible: Some($crate::FutureIncompatibleInfo {
@@ -859,7 +860,7 @@ macro_rules! declare_tool_lint {
             edition_lint_opts: None,
             report_in_external_macro: $external,
             future_incompatible: None,
-            is_loaded: true,
+            is_externally_loaded: true,
             $(feature_gate: Some($gate),)?
             crate_level_only: false,
             ..$crate::Lint::default_fields_for_macro()

compiler/rustc_middle/src/traits/solve.rs

@@ -332,4 +332,9 @@ pub enum CandidateSource {
     /// }
     /// ```
     AliasBound,
+    /// A candidate that is registered only during coherence to represent some
+    /// yet-unknown impl that could be produced downstream without violating orphan
+    /// rules.
+    // FIXME: Merge this with the forced ambiguity candidates, so those don't use `Misc`.
+    CoherenceUnknowable,
 }

compiler/rustc_middle/src/traits/solve/inspect.rs

@@ -141,10 +141,6 @@ pub enum ProbeKind<'tcx> {
     TryNormalizeNonRigid { result: QueryResult<'tcx> },
     /// Probe entered when normalizing the self ty during candidate assembly
     NormalizedSelfTyAssembly,
-    /// Some candidate to prove the current goal.
-    ///
-    /// FIXME: Remove this in favor of always using more strongly typed variants.
-    MiscCandidate { name: &'static str, result: QueryResult<'tcx> },
     /// A candidate for proving a trait or alias-relate goal.
     TraitCandidate { source: CandidateSource, result: QueryResult<'tcx> },
     /// Used in the probe that wraps normalizing the non-self type for the unsize
@@ -154,4 +150,6 @@ pub enum ProbeKind<'tcx> {
     /// do a probe to find out what projection type(s) may be used to prove that
     /// the source type upholds all of the target type's object bounds.
     UpcastProjectionCompatibility,
+    /// Try to unify an opaque type with an existing key in the storage.
+    OpaqueTypeStorageLookup { result: QueryResult<'tcx> },
 }

compiler/rustc_middle/src/traits/solve/inspect/format.rs

@@ -112,8 +112,8 @@ impl<'a, 'b> ProofTreeFormatter<'a, 'b> {
             ProbeKind::UpcastProjectionCompatibility => {
                 write!(self.f, "PROBING FOR PROJECTION COMPATIBILITY FOR UPCASTING:")
             }
-            ProbeKind::MiscCandidate { name, result } => {
-                write!(self.f, "CANDIDATE {name}: {result:?}")
+            ProbeKind::OpaqueTypeStorageLookup { result } => {
+                write!(self.f, "PROBING FOR AN EXISTING OPAQUE: {result:?}")
             }
             ProbeKind::TraitCandidate { source, result } => {
                 write!(self.f, "CANDIDATE {source:?}: {result:?}")

compiler/rustc_mir_build/src/build/matches/mod.rs

@@ -73,14 +73,14 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
         let expr_span = expr.span;
 
         match expr.kind {
-            ExprKind::LogicalOp { op: LogicalOp::And, lhs, rhs } => {
-                this.visit_coverage_branch_operation(LogicalOp::And, expr_span);
+            ExprKind::LogicalOp { op: op @ LogicalOp::And, lhs, rhs } => {
+                this.visit_coverage_branch_operation(op, expr_span);
                 let lhs_then_block = unpack!(this.then_else_break_inner(block, lhs, args));
                 let rhs_then_block = unpack!(this.then_else_break_inner(lhs_then_block, rhs, args));
                 rhs_then_block.unit()
             }
-            ExprKind::LogicalOp { op: LogicalOp::Or, lhs, rhs } => {
-                this.visit_coverage_branch_operation(LogicalOp::Or, expr_span);
+            ExprKind::LogicalOp { op: op @ LogicalOp::Or, lhs, rhs } => {
+                this.visit_coverage_branch_operation(op, expr_span);
                 let local_scope = this.local_scope();
                 let (lhs_success_block, failure_block) =
                     this.in_if_then_scope(local_scope, expr_span, |this| {

compiler/rustc_mir_transform/src/known_panics_lint.rs

@@ -896,13 +896,19 @@ impl CanConstProp {
         };
         for (local, val) in cpv.can_const_prop.iter_enumerated_mut() {
             let ty = body.local_decls[local].ty;
-            match tcx.layout_of(param_env.and(ty)) {
-                Ok(layout) if layout.size < Size::from_bytes(MAX_ALLOC_LIMIT) => {}
-                // Either the layout fails to compute, then we can't use this local anyway
-                // or the local is too large, then we don't want to.
-                _ => {
-                    *val = ConstPropMode::NoPropagation;
-                    continue;
+            if ty.is_union() {
+                // Do not const prop unions as they can
+                // ICE during layout calc
+                *val = ConstPropMode::NoPropagation;
+            } else {
+                match tcx.layout_of(param_env.and(ty)) {
+                    Ok(layout) if layout.size < Size::from_bytes(MAX_ALLOC_LIMIT) => {}
+                    // Either the layout fails to compute, then we can't use this local anyway
+                    // or the local is too large, then we don't want to.
+                    _ => {
+                        *val = ConstPropMode::NoPropagation;
+                        continue;
+                    }
                 }
             }
         }