normalize use of backticks/lowercase in compiler messages for librustc_mir

src/librustc_mir/build/matches/mod.rs

@@ -1465,7 +1465,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     .map(|b| GuardFrameLocal::new(b.var_id, b.binding_mode))
                     .collect(),
             };
-            debug!("Entering guard building context: {:?}", guard_frame);
+            debug!("entering guard building context: {:?}", guard_frame);
             self.guard_context.push(guard_frame);
 
             let re_erased = tcx.lifetimes.re_erased;

src/librustc_mir/hair/pattern/check_match.rs

@@ -577,7 +577,7 @@ fn check_legality_of_move_bindings(
                                            "cannot bind by-move into a pattern guard");
             err.span_label(p.span, "moves value into pattern guard");
             if cx.tcx.sess.opts.unstable_features.is_nightly_build() {
-                err.help("add #![feature(bind_by_move_pattern_guards)] to the \
+                err.help("add `#![feature(bind_by_move_pattern_guards)]` to the \
                           crate attributes to enable");
             }
             err.emit();
@@ -664,7 +664,7 @@ impl<'a, 'tcx> Delegate<'tcx> for MutationChecker<'a, 'tcx> {
                           "cannot mutably borrow in a pattern guard");
                 err.span_label(span, "borrowed mutably in pattern guard");
                 if self.cx.tcx.sess.opts.unstable_features.is_nightly_build() {
-                    err.help("add #![feature(bind_by_move_pattern_guards)] to the \
+                    err.help("add `#![feature(bind_by_move_pattern_guards)]` to the \
                               crate attributes to enable");
                 }
                 err.emit();

src/librustc_mir/interpret/place.rs

@@ -351,7 +351,7 @@ where
                 if field >= len {
                     // This can be violated because this runs during promotion on code where the
                     // type system has not yet ensured that such things don't happen.
-                    debug!("Tried to access element {} of array/slice with length {}", field, len);
+                    debug!("tried to access element {} of array/slice with length {}", field, len);
                     return err!(BoundsCheck { len, index: field });
                 }
                 stride * field

src/librustc_mir/monomorphize/collector.rs

@@ -289,7 +289,7 @@ pub fn collect_crate_mono_items(
         collect_roots(tcx, mode)
     });
 
-    debug!("Building mono item graph, beginning at roots");
+    debug!("building mono item graph, beginning at roots");
 
     let mut visited = MTLock::new(FxHashSet::default());
     let mut inlining_map = MTLock::new(InliningMap::new());
@@ -316,7 +316,7 @@ pub fn collect_crate_mono_items(
 // Find all non-generic items by walking the HIR. These items serve as roots to
 // start monomorphizing from.
 fn collect_roots(tcx: TyCtxt<'_>, mode: MonoItemCollectionMode) -> Vec<MonoItem<'_>> {
-    debug!("Collecting roots");
+    debug!("collecting roots");
     let mut roots = Vec::new();
 
     {

src/librustc_mir/transform/check_unsafety.rs

@@ -552,10 +552,10 @@ fn unsafe_derive_on_repr_packed(tcx: TyCtxt<'_>, def_id: DefId) {
     // FIXME: when we make this a hard error, this should have its
     // own error code.
     let message = if tcx.generics_of(def_id).own_requires_monomorphization() {
-        "#[derive] can't be used on a #[repr(packed)] struct with \
+        "`#[derive]` can't be used on a `#[repr(packed)]` struct with \
          type or const parameters (error E0133)".to_string()
     } else {
-        "#[derive] can't be used on a #[repr(packed)] struct that \
+        "`#[derive]` can't be used on a `#[repr(packed)]` struct that \
          does not derive Copy (error E0133)".to_string()
     };
     tcx.lint_hir(SAFE_PACKED_BORROWS,

src/librustc_mir/transform/copy_prop.rs

@@ -47,7 +47,7 @@ impl MirPass for CopyPropagation {
 
             let mut changed = false;
             for dest_local in body.local_decls.indices() {
-                debug!("Considering destination local: {:?}", dest_local);
+                debug!("considering destination local: {:?}", dest_local);
 
                 let action;
                 let location;
@@ -159,7 +159,7 @@ fn eliminate_self_assignments(
             } else {
                 continue;
             }
-            debug!("Deleting a self-assignment for {:?}", dest_local);
+            debug!("deleting a self-assignment for {:?}", dest_local);
             body.make_statement_nop(location);
             changed = true;
         }

src/librustc_mir/transform/inline.rs

@@ -159,7 +159,7 @@ impl Inliner<'tcx> {
 
         // Simplify if we inlined anything.
         if changed {
-            debug!("Running simplify cfg on {:?}", self.source);
+            debug!("running simplify cfg on {:?}", self.source);
             CfgSimplifier::new(caller_body).simplify();
             remove_dead_blocks(caller_body);
         }
@@ -247,7 +247,7 @@ impl Inliner<'tcx> {
             // need to check for first.
             attr::InlineAttr::Always => true,
             attr::InlineAttr::Never => {
-                debug!("#[inline(never)] present - not inlining");
+                debug!("`#[inline(never)]` present - not inlining");
                 return false
             }
             attr::InlineAttr::Hint => true,
@@ -397,7 +397,7 @@ impl Inliner<'tcx> {
         match terminator.kind {
             // FIXME: Handle inlining of diverging calls
             TerminatorKind::Call { args, destination: Some(destination), cleanup, .. } => {
-                debug!("Inlined {:?} into {:?}", callsite.callee, self.source);
+                debug!("inlined {:?} into {:?}", callsite.callee, self.source);
 
                 let mut local_map = IndexVec::with_capacity(callee_body.local_decls.len());
                 let mut scope_map = IndexVec::with_capacity(callee_body.source_scopes.len());
@@ -456,7 +456,7 @@ impl Inliner<'tcx> {
                 }
 
                 let dest = if dest_needs_borrow(&destination.0) {
-                    debug!("Creating temp for return destination");
+                    debug!("creating temp for return destination");
                     let dest = Rvalue::Ref(
                         self.tcx.lifetimes.re_erased,
                         BorrowKind::Mut { allow_two_phase_borrow: false },
@@ -610,7 +610,7 @@ impl Inliner<'tcx> {
             }
         }
 
-        debug!("Creating temp for argument {:?}", arg);
+        debug!("creating temp for argument {:?}", arg);
         // Otherwise, create a temporary for the arg
         let arg = Rvalue::Use(arg);
 
@@ -659,7 +659,7 @@ struct Integrator<'a, 'tcx> {
 impl<'a, 'tcx> Integrator<'a, 'tcx> {
     fn update_target(&self, tgt: BasicBlock) -> BasicBlock {
         let new = BasicBlock::new(tgt.index() + self.block_idx);
-        debug!("Updating target `{:?}`, new: `{:?}`", tgt, new);
+        debug!("updating target `{:?}`, new: `{:?}`", tgt, new);
         new
     }
 }

src/librustc_mir/transform/instcombine.rs

@@ -39,7 +39,7 @@ pub struct InstCombineVisitor<'tcx> {
 impl<'tcx> MutVisitor<'tcx> for InstCombineVisitor<'tcx> {
     fn visit_rvalue(&mut self, rvalue: &mut Rvalue<'tcx>, location: Location) {
         if self.optimizations.and_stars.remove(&location) {
-            debug!("Replacing `&*`: {:?}", rvalue);
+            debug!("replacing `&*`: {:?}", rvalue);
             let new_place = match *rvalue {
                 Rvalue::Ref(_, _, Place::Projection(ref mut projection)) => {
                     // Replace with dummy
@@ -51,7 +51,7 @@ impl<'tcx> MutVisitor<'tcx> for InstCombineVisitor<'tcx> {
         }
 
         if let Some(constant) = self.optimizations.arrays_lengths.remove(&location) {
-            debug!("Replacing `Len([_; N])`: {:?}", rvalue);
+            debug!("replacing `Len([_; N])`: {:?}", rvalue);
             *rvalue = Rvalue::Use(Operand::Constant(box constant));
         }
 

src/librustc_mir/transform/qualify_consts.rs

@@ -1545,7 +1545,7 @@ impl MirPass for QualifyAndPromoteConstants {
                             diag.note("for more information, see issue \
                                        https://github.com/rust-lang/rust/issues/57563");
                             diag.help(
-                                "add #![feature(const_fn)] to the crate attributes to enable",
+                                "add `#![feature(const_fn)]` to the crate attributes to enable",
                             );
                             diag.emit();
                         } else {

src/test/ui/bind-by-move/bind-by-move-no-guards.stderr

@@ -4,7 +4,7 @@ error[E0008]: cannot bind by-move into a pattern guard
 LL |         Some(z) if z.recv().unwrap() => { panic!() },
    |              ^ moves value into pattern guard
    |
-   = help: add #![feature(bind_by_move_pattern_guards)] to the crate attributes to enable
+   = help: add `#![feature(bind_by_move_pattern_guards)]` to the crate attributes to enable
 
 error: aborting due to previous error
 

src/test/ui/borrowck/borrowck-mutate-in-guard.nll.stderr

@@ -10,7 +10,7 @@ error[E0301]: cannot mutably borrow in a pattern guard
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                      ^ borrowed mutably in pattern guard
    |
-   = help: add #![feature(bind_by_move_pattern_guards)] to the crate attributes to enable
+   = help: add `#![feature(bind_by_move_pattern_guards)]` to the crate attributes to enable
 
 error[E0302]: cannot assign in a pattern guard
   --> $DIR/borrowck-mutate-in-guard.rs:15:41

src/test/ui/borrowck/borrowck-mutate-in-guard.stderr

@@ -10,7 +10,7 @@ error[E0301]: cannot mutably borrow in a pattern guard
 LL |         Enum::A(_) if { let y = &mut x; *y = Enum::B(false); false } => 1,
    |                                      ^ borrowed mutably in pattern guard
    |
-   = help: add #![feature(bind_by_move_pattern_guards)] to the crate attributes to enable
+   = help: add `#![feature(bind_by_move_pattern_guards)]` to the crate attributes to enable
 
 error[E0302]: cannot assign in a pattern guard
   --> $DIR/borrowck-mutate-in-guard.rs:15:41

src/test/ui/consts/const_let_refutable.nll.stderr

@@ -11,7 +11,7 @@ LL |     a + b
    |     ^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0381]: use of possibly uninitialized variable: `a`
   --> $DIR/const_let_refutable.rs:4:5

src/test/ui/consts/const_let_refutable.stderr

@@ -11,7 +11,7 @@ LL |     a + b
    |     ^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 warning[E0381]: use of possibly uninitialized variable: `a`
   --> $DIR/const_let_refutable.rs:4:5

src/test/ui/consts/min_const_fn/allow_const_fn_ptr.stderr

@@ -5,7 +5,7 @@ LL | const fn error(_: fn()) {}
    |                ^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to previous error
 

src/test/ui/consts/min_const_fn/bad_const_fn_body_ice.stderr

@@ -5,7 +5,7 @@ LL |     vec![1, 2, 3]
    |     ^^^^^^^^^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error: aborting due to previous error

src/test/ui/consts/min_const_fn/cast_errors.stderr

@@ -5,7 +5,7 @@ LL | const fn unsize(x: &[u8; 3]) -> &[u8] { x }
    |                                         ^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0723]: function pointers in const fn are unstable
   --> $DIR/cast_errors.rs:5:23
@@ -14,7 +14,7 @@ LL | const fn closure() -> fn() { || {} }
    |                       ^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0723]: function pointers in const fn are unstable
   --> $DIR/cast_errors.rs:8:5
@@ -23,7 +23,7 @@ LL |     (|| {}) as fn();
    |     ^^^^^^^^^^^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0723]: function pointers in const fn are unstable
   --> $DIR/cast_errors.rs:11:28
@@ -32,7 +32,7 @@ LL | const fn reify(f: fn()) -> unsafe fn() { f }
    |                            ^^^^^^^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error[E0723]: function pointers in const fn are unstable
   --> $DIR/cast_errors.rs:13:21
@@ -41,7 +41,7 @@ LL | const fn reify2() { main as unsafe fn(); }
    |                     ^^^^^^^^^^^^^^^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to 5 previous errors
 

src/test/ui/consts/min_const_fn/cmp_fn_pointers.stderr

@@ -5,7 +5,7 @@ LL | const fn cmp(x: fn(), y: fn()) -> bool {
    |              ^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to previous error
 

src/test/ui/consts/min_const_fn/loop_ice.stderr

@@ -5,7 +5,7 @@ LL |     loop {}
    |     ^^^^^^^
    |
    = note: for more information, see issue https://github.com/rust-lang/rust/issues/57563
-   = help: add #![feature(const_fn)] to the crate attributes to enable
+   = help: add `#![feature(const_fn)]` to the crate attributes to enable
 
 error: aborting due to previous error