Remove #[macro_use] extern crate tracing from rustc_ty_utils.

Author: nnethercote

compiler/rustc_ty_utils/src/abi.rs

@@ -14,6 +14,7 @@ use rustc_target::abi::call::{
 };
 use rustc_target::abi::*;
 use rustc_target::spec::abi::Abi as SpecAbi;
+use tracing::debug;
 
 use std::iter;
 

compiler/rustc_ty_utils/src/consts.rs

@@ -11,6 +11,7 @@ use rustc_middle::ty::{self, Expr, TyCtxt, TypeVisitableExt};
 use rustc_middle::{mir, thir};
 use rustc_span::Span;
 use rustc_target::abi::{VariantIdx, FIRST_VARIANT};
+use tracing::{debug, instrument};
 
 use std::iter;
 

compiler/rustc_ty_utils/src/instance.rs

@@ -9,6 +9,7 @@ use rustc_middle::ty::{self, Instance, TyCtxt, TypeVisitableExt};
 use rustc_span::sym;
 use rustc_trait_selection::traits;
 use rustc_type_ir::ClosureKind;
+use tracing::debug;
 use traits::{translate_args, Reveal};
 
 use crate::errors::UnexpectedFnPtrAssociatedItem;

compiler/rustc_ty_utils/src/layout.rs

@@ -16,6 +16,7 @@ use rustc_session::{DataTypeKind, FieldInfo, FieldKind, SizeKind, VariantInfo};
 use rustc_span::sym;
 use rustc_span::symbol::Symbol;
 use rustc_target::abi::*;
+use tracing::{debug, instrument, trace};
 
 use std::fmt::Debug;
 use std::iter;

compiler/rustc_ty_utils/src/lib.rs

@@ -16,9 +16,6 @@
 #![feature(let_chains)]
 #![feature(never_type)]
 
-#[macro_use]
-extern crate tracing;
-
 use rustc_middle::query::Providers;
 
 mod abi;

compiler/rustc_ty_utils/src/needs_drop.rs

@@ -9,6 +9,7 @@ use rustc_middle::ty::GenericArgsRef;
 use rustc_middle::ty::{self, EarlyBinder, Ty, TyCtxt};
 use rustc_session::Limit;
 use rustc_span::sym;
+use tracing::debug;
 
 use crate::errors::NeedsDropOverflow;
 

compiler/rustc_ty_utils/src/opaque_types.rs

@@ -8,6 +8,7 @@ use rustc_middle::ty::util::{CheckRegions, NotUniqueParam};
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_middle::ty::{TypeSuperVisitable, TypeVisitable, TypeVisitor};
 use rustc_span::Span;
+use tracing::{instrument, trace};
 
 use crate::errors::{DuplicateArg, NotParam};
 

compiler/rustc_ty_utils/src/sig_types.rs

@@ -8,6 +8,7 @@ use rustc_middle::span_bug;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::Span;
 use rustc_type_ir::visit::TypeVisitable;
+use tracing::{instrument, trace};
 
 pub trait SpannedTypeVisitor<'tcx> {
     type Result: VisitorResult = ();

compiler/rustc_ty_utils/src/ty.rs

@@ -10,6 +10,7 @@ use rustc_middle::ty::{TypeSuperVisitable, TypeVisitable, Upcast};
 use rustc_span::def_id::{DefId, LocalDefId, CRATE_DEF_ID};
 use rustc_span::DUMMY_SP;
 use rustc_trait_selection::traits;
+use tracing::{debug, instrument};
 
 #[instrument(level = "debug", skip(tcx), ret)]
 fn sized_constraint_for_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<Ty<'tcx>> {