Remove extern crate rustc_middle from rustc_mir_build.

compiler/rustc_mir_build/src/build/block.rs

@@ -1,6 +1,7 @@
 use crate::build::ForGuard::OutsideGuard;
 use crate::build::{BlockAnd, BlockAndExtension, BlockFrame, Builder};
 use rustc_middle::middle::region::Scope;
+use rustc_middle::span_bug;
 use rustc_middle::thir::*;
 use rustc_middle::{mir::*, ty};
 use rustc_span::Span;

compiler/rustc_mir_build/src/build/coverageinfo/mcdc.rs

@@ -1,5 +1,6 @@
 use std::collections::VecDeque;
 
+use rustc_middle::bug;
 use rustc_middle::mir::coverage::{
     BlockMarkerId, ConditionId, ConditionInfo, MCDCBranchSpan, MCDCDecisionSpan,
 };

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

@@ -24,6 +24,7 @@ use rustc_hir::HirId;
 use rustc_index::{IndexSlice, IndexVec};
 use rustc_middle::{
     mir::*,
+    span_bug,
     thir::*,
     ty::{ParamEnv, Ty, TyCtxt},
 };

compiler/rustc_mir_build/src/build/expr/as_constant.rs

@@ -9,6 +9,7 @@ use rustc_middle::thir::*;
 use rustc_middle::ty::{
     self, CanonicalUserType, CanonicalUserTypeAnnotation, TyCtxt, UserTypeAnnotationIndex,
 };
+use rustc_middle::{bug, span_bug};
 use rustc_target::abi::Size;
 
 impl<'a, 'tcx> Builder<'a, 'tcx> {

compiler/rustc_mir_build/src/build/expr/as_place.rs

@@ -4,6 +4,7 @@ use crate::build::expr::category::Category;
 use crate::build::ForGuard::{OutsideGuard, RefWithinGuard};
 use crate::build::{BlockAnd, BlockAndExtension, Builder, Capture, CaptureMap};
 use rustc_hir::def_id::LocalDefId;
+use rustc_middle::bug;
 use rustc_middle::hir::place::Projection as HirProjection;
 use rustc_middle::hir::place::ProjectionKind as HirProjectionKind;
 use rustc_middle::middle::region;

compiler/rustc_mir_build/src/build/expr/as_rvalue.rs

@@ -9,6 +9,7 @@ use crate::build::expr::as_place::PlaceBase;
 use crate::build::expr::category::{Category, RvalueFunc};
 use crate::build::{BlockAnd, BlockAndExtension, Builder, NeedsTemporary};
 use rustc_hir::lang_items::LangItem;
+use rustc_middle::bug;
 use rustc_middle::middle::region;
 use rustc_middle::mir::interpret::Scalar;
 use rustc_middle::mir::*;

compiler/rustc_mir_build/src/build/expr/into.rs

@@ -7,6 +7,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_hir as hir;
 use rustc_middle::mir::*;
+use rustc_middle::span_bug;
 use rustc_middle::thir::*;
 use rustc_middle::ty::CanonicalUserTypeAnnotation;
 use rustc_span::source_map::Spanned;

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

@@ -12,6 +12,7 @@ use crate::build::{BlockAnd, BlockAndExtension, Builder};
 use crate::build::{GuardFrame, GuardFrameLocal, LocalsForNode};
 use rustc_data_structures::{fx::FxIndexMap, stack::ensure_sufficient_stack};
 use rustc_hir::{BindingMode, ByRef};
+use rustc_middle::bug;
 use rustc_middle::middle::region;
 use rustc_middle::mir::{self, *};
 use rustc_middle::thir::{self, *};

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

@@ -13,6 +13,7 @@ use rustc_middle::mir::*;
 use rustc_middle::ty::util::IntTypeExt;
 use rustc_middle::ty::GenericArg;
 use rustc_middle::ty::{self, adjustment::PointerCoercion, Ty, TyCtxt};
+use rustc_middle::{bug, span_bug};
 use rustc_span::def_id::DefId;
 use rustc_span::source_map::Spanned;
 use rustc_span::symbol::{sym, Symbol};

compiler/rustc_mir_build/src/build/mod.rs

@@ -20,6 +20,7 @@ use rustc_middle::mir::*;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::thir::{self, ExprId, LintLevel, LocalVarId, Param, ParamId, PatKind, Thir};
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitableExt};
+use rustc_middle::{bug, span_bug};
 use rustc_span::symbol::sym;
 use rustc_span::Span;
 use rustc_span::Symbol;

compiler/rustc_mir_build/src/build/scope.rs

@@ -90,6 +90,7 @@ use rustc_index::{IndexSlice, IndexVec};
 use rustc_middle::middle::region;
 use rustc_middle::mir::*;
 use rustc_middle::thir::{ExprId, LintLevel};
+use rustc_middle::{bug, span_bug};
 use rustc_session::lint::Level;
 use rustc_span::source_map::Spanned;
 use rustc_span::{Span, DUMMY_SP};