Remove extern crate rustc_middle from rustc_infer.

Author: nnethercote

compiler/rustc_infer/src/errors/note_and_explain.rs

@@ -1,6 +1,7 @@
 use crate::fluent_generated as fluent;
 use crate::infer::error_reporting::nice_region_error::find_anon_type;
 use rustc_errors::{Diag, EmissionGuarantee, IntoDiagArg, SubdiagMessageOp, Subdiagnostic};
+use rustc_middle::bug;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::{symbol::kw, Span};
 

compiler/rustc_infer/src/infer/at.rs

@@ -27,6 +27,7 @@
 
 use super::*;
 
+use rustc_middle::bug;
 use rustc_middle::ty::relate::{Relate, TypeRelation};
 use rustc_middle::ty::{Const, ImplSubject};
 

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

@@ -9,6 +9,7 @@ use crate::infer::canonical::{
     Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, OriginalQueryValues,
 };
 use crate::infer::InferCtxt;
+use rustc_middle::bug;
 use rustc_middle::ty::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable};
 use rustc_middle::ty::GenericArg;
 use rustc_middle::ty::{self, BoundVar, InferConst, List, Ty, TyCtxt, TypeFlags, TypeVisitableExt};

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

@@ -8,6 +8,7 @@
 
 use crate::infer::canonical::{Canonical, CanonicalVarValues};
 use rustc_macros::extension;
+use rustc_middle::bug;
 use rustc_middle::ty::fold::{FnMutDelegate, TypeFoldable};
 use rustc_middle::ty::GenericArgKind;
 use rustc_middle::ty::{self, TyCtxt};

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

@@ -25,6 +25,7 @@ use rustc_middle::mir::ConstraintCategory;
 use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::{self, BoundVar, Ty, TyCtxt};
 use rustc_middle::ty::{GenericArg, GenericArgKind};
+use rustc_middle::{bug, span_bug};
 use std::fmt::Debug;
 use std::iter;
 

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

@@ -69,6 +69,7 @@ use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::intravisit::Visitor;
 use rustc_hir::lang_items::LangItem;
 use rustc_macros::extension;
+use rustc_middle::bug;
 use rustc_middle::dep_graph::DepContext;
 use rustc_middle::ty::print::{with_forced_trimmed_paths, PrintError, PrintTraitRefExt as _};
 use rustc_middle::ty::relate::{self, RelateResult, TypeRelation};

compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs

@@ -11,6 +11,7 @@ use rustc_hir::def::{CtorOf, DefKind, Namespace};
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_hir::{Body, Closure, Expr, ExprKind, FnRetTy, HirId, LetStmt, LocalSource};
+use rustc_middle::bug;
 use rustc_middle::hir::nested_filter;
 use rustc_middle::infer::unify_key::ConstVariableValue;
 use rustc_middle::ty::adjustment::{Adjust, Adjustment, AutoBorrow};

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mismatched_static_lifetime.rs

@@ -13,6 +13,7 @@ use rustc_data_structures::fx::FxIndexSet;
 use rustc_errors::{ErrorGuaranteed, MultiSpan};
 use rustc_hir as hir;
 use rustc_hir::intravisit::Visitor;
+use rustc_middle::bug;
 use rustc_middle::ty::TypeVisitor;
 
 impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/placeholder_error.rs

@@ -11,6 +11,7 @@ use rustc_data_structures::intern::Interned;
 use rustc_errors::{Diag, IntoDiagArg};
 use rustc_hir::def::Namespace;
 use rustc_hir::def_id::{DefId, CRATE_DEF_ID};
+use rustc_middle::bug;
 use rustc_middle::ty::error::ExpectedFound;
 use rustc_middle::ty::print::{FmtPrinter, Print, PrintTraitRefExt as _, RegionHighlightMode};
 use rustc_middle::ty::GenericArgsRef;

compiler/rustc_infer/src/infer/freshen.rs

@@ -32,6 +32,7 @@
 //! inferencer knows "so far".
 use super::InferCtxt;
 use rustc_data_structures::fx::FxHashMap;
+use rustc_middle::bug;
 use rustc_middle::infer::unify_key::ToType;
 use rustc_middle::ty::fold::TypeFolder;
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeFoldable, TypeSuperFoldable, TypeVisitableExt};