Remove #[macro_use] extern crate tracing from rustc_infer.

compiler/rustc_infer/src/infer/canonical/canonicalizer.rs

@@ -13,6 +13,7 @@
     self, BoundVar, GenericArg, InferConst, List, Ty, TyCtxt, TypeFlags, TypeVisitableExt,
 };
 use smallvec::SmallVec;
+use tracing::debug;
 
 use crate::infer::canonical::{
     Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, OriginalQueryValues,

compiler/rustc_infer/src/infer/canonical/query_response.rs

@@ -17,6 +17,7 @@
 use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::{self, BoundVar, GenericArg, GenericArgKind, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
+use tracing::{debug, instrument};
 
 use crate::infer::canonical::instantiate::{instantiate_value, CanonicalExt};
 use crate::infer::canonical::{

compiler/rustc_infer/src/infer/free_regions.rs

@@ -5,6 +5,7 @@
 
 use rustc_data_structures::transitive_relation::TransitiveRelation;
 use rustc_middle::ty::{Region, TyCtxt};
+use tracing::debug;
 
 /// Combines a `FreeRegionMap` and a `TyCtxt`.
 ///

compiler/rustc_infer/src/infer/lexical_region_resolve/mod.rs

@@ -16,6 +16,7 @@
 };
 use rustc_middle::{bug, span_bug};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use super::outlives::test_type_match;
 use crate::infer::region_constraints::{

compiler/rustc_infer/src/infer/mod.rs

@@ -44,6 +44,7 @@
 use rustc_span::symbol::Symbol;
 use rustc_span::Span;
 use snapshot::undo_log::InferCtxtUndoLogs;
+use tracing::{debug, instrument};
 use type_variable::TypeVariableOrigin;
 pub use BoundRegionConversionTime::*;
 pub use RegionVariableOrigin::*;

compiler/rustc_infer/src/infer/opaque_types/mod.rs

@@ -11,6 +11,7 @@
     TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor,
 };
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use crate::errors::OpaqueHiddenTypeDiag;
 use crate::infer::{InferCtxt, InferOk};

compiler/rustc_infer/src/infer/opaque_types/table.rs

@@ -1,6 +1,7 @@
 use rustc_data_structures::undo_log::UndoLogs;
 use rustc_middle::bug;
 use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey, Ty};
+use tracing::instrument;
 
 use super::{OpaqueTypeDecl, OpaqueTypeMap};
 use crate::infer::snapshot::undo_log::{InferCtxtUndoLogs, UndoLog};

compiler/rustc_infer/src/infer/outlives/env.rs

@@ -2,6 +2,7 @@
 use rustc_data_structures::transitive_relation::TransitiveRelationBuilder;
 use rustc_middle::bug;
 use rustc_middle::ty::{self, Region};
+use tracing::{debug, instrument};
 
 use super::explicit_outlives_bounds;
 use crate::infer::free_regions::FreeRegionMap;

compiler/rustc_infer/src/infer/outlives/mod.rs

@@ -2,6 +2,7 @@
 
 use rustc_middle::traits::query::{NoSolution, OutlivesBound};
 use rustc_middle::ty;
+use tracing::instrument;
 
 use self::env::OutlivesEnvironment;
 use super::region_constraints::RegionConstraintData;

compiler/rustc_infer/src/infer/outlives/obligations.rs

@@ -70,6 +70,7 @@
 use rustc_span::DUMMY_SP;
 use rustc_type_ir::outlives::{push_outlives_components, Component};
 use smallvec::smallvec;
+use tracing::{debug, instrument};
 
 use super::env::OutlivesEnvironment;
 use crate::infer::outlives::env::RegionBoundPairs;

compiler/rustc_infer/src/infer/outlives/test_type_match.rs

@@ -3,6 +3,7 @@
 use rustc_data_structures::fx::FxHashMap;
 use rustc_middle::ty::error::TypeError;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt};
+use tracing::instrument;
 
 use crate::infer::region_constraints::VerifyIfEq;
 use crate::infer::relate::{self as relate, Relate, RelateResult, TypeRelation};

compiler/rustc_infer/src/infer/outlives/verify.rs

@@ -3,6 +3,7 @@
 use rustc_middle::ty::{self, OutlivesPredicate, Ty, TyCtxt};
 use rustc_type_ir::outlives::{compute_alias_components_recursive, Component};
 use smallvec::smallvec;
+use tracing::{debug, instrument, trace};
 
 use crate::infer::outlives::env::RegionBoundPairs;
 use crate::infer::region_constraints::VerifyIfEq;

compiler/rustc_infer/src/infer/region_constraints/leak_check.rs

@@ -4,6 +4,7 @@
 use rustc_index::Idx;
 use rustc_middle::span_bug;
 use rustc_middle::ty::error::TypeError;
+use tracing::{debug, instrument};
 
 use super::*;
 use crate::infer::relate::RelateResult;

compiler/rustc_infer/src/infer/region_constraints/mod.rs

@@ -13,6 +13,7 @@
 use rustc_middle::ty::{self, ReBound, ReStatic, ReVar, Region, RegionVid, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use self::CombineMapType::*;
 use self::UndoLog::*;

compiler/rustc_infer/src/infer/relate/combine.rs

@@ -24,6 +24,7 @@
 use rustc_middle::ty::error::{ExpectedFound, TypeError};
 use rustc_middle::ty::{self, InferConst, IntType, Ty, TyCtxt, TypeVisitableExt, UintType, Upcast};
 pub use rustc_next_trait_solver::relate::combine::*;
+use tracing::debug;
 
 use super::glb::Glb;
 use super::lub::Lub;

compiler/rustc_infer/src/infer/relate/generalize.rs

@@ -11,6 +11,7 @@
     self, AliasRelationDirection, InferConst, Term, Ty, TyCtxt, TypeVisitable, TypeVisitableExt,
 };
 use rustc_span::Span;
+use tracing::{debug, instrument, warn};
 
 use super::{
     PredicateEmittingRelation, Relate, RelateResult, StructurallyRelateAliases, TypeRelation,

compiler/rustc_infer/src/infer/relate/glb.rs

@@ -4,6 +4,7 @@
 use rustc_middle::ty::relate::{Relate, RelateResult, TypeRelation};
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use super::combine::{CombineFields, PredicateEmittingRelation};
 use super::lattice::{self, LatticeDir};

compiler/rustc_infer/src/infer/relate/higher_ranked.rs

@@ -3,6 +3,7 @@
 
 use rustc_middle::ty::fold::FnMutDelegate;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable};
+use tracing::{debug, instrument};
 
 use super::RelateResult;
 use crate::infer::snapshot::CombinedSnapshot;

compiler/rustc_infer/src/infer/relate/lattice.rs

@@ -19,6 +19,7 @@
 
 use rustc_middle::ty::relate::RelateResult;
 use rustc_middle::ty::{self, Ty, TyVar};
+use tracing::instrument;
 
 use super::combine::PredicateEmittingRelation;
 use crate::infer::{DefineOpaqueTypes, InferCtxt};

compiler/rustc_infer/src/infer/relate/lub.rs

@@ -4,6 +4,7 @@
 use rustc_middle::ty::relate::{Relate, RelateResult, TypeRelation};
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use super::combine::{CombineFields, PredicateEmittingRelation};
 use super::lattice::{self, LatticeDir};

compiler/rustc_infer/src/infer/relate/type_relating.rs

@@ -4,6 +4,7 @@
 };
 use rustc_middle::ty::{self, Ty, TyCtxt, TyVar};
 use rustc_span::Span;
+use tracing::{debug, instrument};
 
 use super::combine::CombineFields;
 use crate::infer::relate::{PredicateEmittingRelation, StructurallyRelateAliases};

compiler/rustc_infer/src/infer/snapshot/fudge.rs

@@ -4,6 +4,7 @@
 use rustc_middle::infer::unify_key::{ConstVariableValue, ConstVidKey};
 use rustc_middle::ty::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 use rustc_middle::ty::{self, ConstVid, FloatVid, IntVid, RegionVid, Ty, TyCtxt, TyVid};
+use tracing::instrument;
 use ut::UnifyKey;
 
 use crate::infer::type_variable::TypeVariableOrigin;

compiler/rustc_infer/src/infer/snapshot/mod.rs

@@ -1,5 +1,6 @@
 use rustc_data_structures::undo_log::UndoLogs;
 use rustc_middle::ty;
+use tracing::{debug, instrument};
 
 use super::region_constraints::RegionSnapshot;
 use super::InferCtxt;

compiler/rustc_infer/src/infer/snapshot/undo_log.rs

@@ -4,6 +4,7 @@
 use rustc_data_structures::{snapshot_vec as sv, unify as ut};
 use rustc_middle::infer::unify_key::{ConstVidKey, EffectVidKey, RegionVidKey};
 use rustc_middle::ty::{self, OpaqueHiddenType, OpaqueTypeKey};
+use tracing::debug;
 
 use crate::infer::{region_constraints, type_variable, InferCtxtInner};
 use crate::traits;

compiler/rustc_infer/src/infer/type_variable.rs

@@ -9,6 +9,7 @@
 use rustc_middle::bug;
 use rustc_middle::ty::{self, Ty, TyVid};
 use rustc_span::Span;
+use tracing::debug;
 
 use crate::infer::InferCtxtUndoLogs;
 

compiler/rustc_infer/src/lib.rs

@@ -31,9 +31,6 @@
 #![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
-#[macro_use]
-extern crate tracing;
-
 mod errors;
 pub mod infer;
 pub mod traits;

compiler/rustc_infer/src/traits/project.rs

@@ -4,6 +4,7 @@
 use rustc_data_structures::undo_log::Rollback;
 use rustc_middle::traits::EvaluationResult;
 use rustc_middle::ty;
+use tracing::{debug, info};
 
 use super::PredicateObligation;
 use crate::infer::snapshot::undo_log::InferCtxtUndoLogs;