Rename rustc_errors dependency in rust 2018 crates

64 files changed, 72 insertions, 82 deletions

diff --git a/src/librustc/Cargo.toml b/src/librustc/Cargo.toml
index c9a04f4c683..cb9eb32f8d2 100644
--- a/src/librustc/Cargo.toml
+++ b/src/librustc/Cargo.toml
@@ -25,7 +25,7 @@ rustc-rayon-core = "0.1.1"
 rustc_apfloat = { path = "../librustc_apfloat" }
 rustc_target = { path = "../librustc_target" }
 rustc_data_structures = { path = "../librustc_data_structures" }
-rustc_errors = { path = "../librustc_errors" }
+errors = { path = "../librustc_errors", package = "rustc_errors" }
 serialize = { path = "../libserialize" }
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
diff --git a/src/librustc/dep_graph/graph.rs b/src/librustc/dep_graph/graph.rs
index e8c1cd36064..feaff39719b 100644
--- a/src/librustc/dep_graph/graph.rs
+++ b/src/librustc/dep_graph/graph.rs
@@ -1,4 +1,4 @@
-use crate::errors::{Diagnostic, DiagnosticBuilder};
+use errors::{Diagnostic, DiagnosticBuilder};
 use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::indexed_vec::{Idx, IndexVec};
diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index 43c756def88..1a825c44add 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -31,7 +31,7 @@
 //! in the HIR, especially for multiple identifiers.
 
 use crate::dep_graph::DepGraph;
-use crate::errors::Applicability;
+use errors::Applicability;
 use crate::hir::{self, ParamName};
 use crate::hir::HirVec;
 use crate::hir::map::{DefKey, DefPathData, Definitions};
diff --git a/src/librustc/hir/mod.rs b/src/librustc/hir/mod.rs
index 3e7dd1432e1..e454a4502d4 100644
--- a/src/librustc/hir/mod.rs
+++ b/src/librustc/hir/mod.rs
@@ -10,7 +10,7 @@ pub use self::PrimTy::*;
 pub use self::UnOp::*;
 pub use self::UnsafeSource::*;
 
-use crate::errors::FatalError;
+use errors::FatalError;
 use crate::hir::def::Def;
 use crate::hir::def_id::{DefId, DefIndex, LocalDefId, CRATE_DEF_INDEX};
 use crate::util::nodemap::{NodeMap, FxHashSet};
diff --git a/src/librustc/infer/error_reporting/mod.rs b/src/librustc/infer/error_reporting/mod.rs
index 1c23438a3b4..f408cc9e3e4 100644
--- a/src/librustc/infer/error_reporting/mod.rs
+++ b/src/librustc/infer/error_reporting/mod.rs
@@ -50,7 +50,7 @@ use super::region_constraints::GenericKind;
 use super::{InferCtxt, RegionVariableOrigin, SubregionOrigin, TypeTrace, ValuePairs};
 use crate::infer::{self, SuppressRegionErrors};
 
-use crate::errors::{Applicability, DiagnosticBuilder, DiagnosticStyledString};
+use errors::{Applicability, DiagnosticBuilder, DiagnosticStyledString};
 use crate::hir;
 use crate::hir::def_id::DefId;
 use crate::hir::Node;
diff --git a/src/librustc/infer/error_reporting/need_type_info.rs b/src/librustc/infer/error_reporting/need_type_info.rs
index fac498bd6dd..7c8146a1a59 100644
--- a/src/librustc/infer/error_reporting/need_type_info.rs
+++ b/src/librustc/infer/error_reporting/need_type_info.rs
@@ -5,7 +5,7 @@ use crate::infer::type_variable::TypeVariableOrigin;
 use crate::ty::{self, Ty, Infer, TyVar};
 use syntax::source_map::CompilerDesugaringKind;
 use syntax_pos::Span;
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 struct FindLocalByTypeVisitor<'a, 'gcx: 'a + 'tcx, 'tcx: 'a> {
     infcx: &'a InferCtxt<'a, 'gcx, 'tcx>,
diff --git a/src/librustc/infer/error_reporting/nice_region_error/named_anon_conflict.rs b/src/librustc/infer/error_reporting/nice_region_error/named_anon_conflict.rs
index d66bb274b34..b10af400f2b 100644
--- a/src/librustc/infer/error_reporting/nice_region_error/named_anon_conflict.rs
+++ b/src/librustc/infer/error_reporting/nice_region_error/named_anon_conflict.rs
@@ -3,7 +3,7 @@
 use crate::infer::error_reporting::nice_region_error::NiceRegionError;
 use crate::ty;
 use crate::util::common::ErrorReported;
-use crate::errors::Applicability;
+use errors::Applicability;
 
 impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx> {
     /// When given a `ConcreteFailure` for a function with arguments containing a named region and
diff --git a/src/librustc/infer/error_reporting/nice_region_error/placeholder_error.rs b/src/librustc/infer/error_reporting/nice_region_error/placeholder_error.rs
index 6893a1fb168..843fa8b0182 100644
--- a/src/librustc/infer/error_reporting/nice_region_error/placeholder_error.rs
+++ b/src/librustc/infer/error_reporting/nice_region_error/placeholder_error.rs
@@ -1,4 +1,4 @@
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 use crate::hir::def_id::DefId;
 use crate::infer::error_reporting::nice_region_error::NiceRegionError;
 use crate::infer::lexical_region_resolve::RegionResolutionError;
diff --git a/src/librustc/infer/error_reporting/nice_region_error/static_impl_trait.rs b/src/librustc/infer/error_reporting/nice_region_error/static_impl_trait.rs
index 3f029795227..23acaeb31f8 100644
--- a/src/librustc/infer/error_reporting/nice_region_error/static_impl_trait.rs
+++ b/src/librustc/infer/error_reporting/nice_region_error/static_impl_trait.rs
@@ -4,7 +4,7 @@ use crate::infer::error_reporting::nice_region_error::NiceRegionError;
 use crate::infer::lexical_region_resolve::RegionResolutionError;
 use crate::ty::{BoundRegion, FreeRegion, RegionKind};
 use crate::util::common::ErrorReported;
-use crate::errors::Applicability;
+use errors::Applicability;
 
 impl<'a, 'gcx, 'tcx> NiceRegionError<'a, 'gcx, 'tcx> {
     /// Print the error message for lifetime errors when the return type is a static impl Trait.
diff --git a/src/librustc/infer/error_reporting/note.rs b/src/librustc/infer/error_reporting/note.rs
index 6c481e8c0c1..c05c6567bbe 100644
--- a/src/librustc/infer/error_reporting/note.rs
+++ b/src/librustc/infer/error_reporting/note.rs
@@ -2,7 +2,7 @@ use crate::infer::{self, InferCtxt, SubregionOrigin};
 use crate::middle::region;
 use crate::ty::{self, Region};
 use crate::ty::error::TypeError;
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     pub(super) fn note_region_origin(&self,
diff --git a/src/librustc/infer/mod.rs b/src/librustc/infer/mod.rs
index dabe1755b0b..706aae88d15 100644
--- a/src/librustc/infer/mod.rs
+++ b/src/librustc/infer/mod.rs
@@ -8,7 +8,7 @@ pub use self::ValuePairs::*;
 pub use crate::ty::IntVarValue;
 
 use arena::SyncDroplessArena;
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 use crate::hir::def_id::DefId;
 use crate::infer::canonical::{Canonical, CanonicalVarValues};
 use crate::middle::free_region::RegionRelations;
diff --git a/src/librustc/lib.rs b/src/librustc/lib.rs
index be147556477..bfe59eda06e 100644
--- a/src/librustc/lib.rs
+++ b/src/librustc/lib.rs
@@ -153,8 +153,6 @@ mod rustc {
     pub use crate::lint;
 }
 
-use rustc_errors as errors;
-
 // FIXME(#27438): right now the unit tests of librustc don't refer to any actual
 //                functions generated in librustc_data_structures (all
 //                references are through generic functions), but statics are
diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index cb31441ca47..e6546617e2d 100644
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -4,7 +4,7 @@
 //! compiler code, rather than using their own custom pass. Those
 //! lints are all available in `rustc_lint::builtin`.
 
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use crate::lint::{LintPass, LateLintPass, LintArray};
 use crate::session::Session;
 use syntax::ast;
diff --git a/src/librustc/lint/context.rs b/src/librustc/lint/context.rs
index 27ead805d5d..a2b34a705f7 100644
--- a/src/librustc/lint/context.rs
+++ b/src/librustc/lint/context.rs
@@ -34,7 +34,7 @@ use std::default::Default as StdDefault;
 use syntax::ast;
 use syntax::edition;
 use syntax_pos::{MultiSpan, Span, symbol::{LocalInternedString, Symbol}};
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 use crate::hir;
 use crate::hir::def_id::LOCAL_CRATE;
 use crate::hir::intravisit as hir_visit;
diff --git a/src/librustc/lint/levels.rs b/src/librustc/lint/levels.rs
index 62bd54de7c9..5d2da649868 100644
--- a/src/librustc/lint/levels.rs
+++ b/src/librustc/lint/levels.rs
@@ -1,6 +1,6 @@
 use std::cmp;
 
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use crate::hir::HirId;
 use crate::ich::StableHashingContext;
 use crate::lint::builtin;
diff --git a/src/librustc/lint/mod.rs b/src/librustc/lint/mod.rs
index 8952ae98e59..7913afe1a4b 100644
--- a/src/librustc/lint/mod.rs
+++ b/src/librustc/lint/mod.rs
@@ -23,7 +23,7 @@ pub use self::LintSource::*;
 
 use rustc_data_structures::sync::{self, Lrc};
 
-use crate::errors::{DiagnosticBuilder, DiagnosticId};
+use errors::{DiagnosticBuilder, DiagnosticId};
 use crate::hir::def_id::{CrateNum, LOCAL_CRATE};
 use crate::hir::intravisit;
 use crate::hir;
diff --git a/src/librustc/middle/lib_features.rs b/src/librustc/middle/lib_features.rs
index 45095d9bc98..c56c98ac008 100644
--- a/src/librustc/middle/lib_features.rs
+++ b/src/librustc/middle/lib_features.rs
@@ -10,7 +10,7 @@ use syntax::ast::{Attribute, MetaItem, MetaItemKind};
 use syntax_pos::Span;
 use crate::hir::intravisit::{self, NestedVisitorMap, Visitor};
 use rustc_data_structures::fx::{FxHashSet, FxHashMap};
-use crate::errors::DiagnosticId;
+use errors::DiagnosticId;
 
 pub struct LibFeatures {
     // A map from feature to stabilisation version.
diff --git a/src/librustc/middle/liveness.rs b/src/librustc/middle/liveness.rs
index 4eb7b918dd8..68f62bd96c2 100644
--- a/src/librustc/middle/liveness.rs
+++ b/src/librustc/middle/liveness.rs
@@ -102,7 +102,7 @@ use crate::hir::Node;
 use crate::ty::{self, TyCtxt};
 use crate::ty::query::Providers;
 use crate::lint;
-use crate::errors::Applicability;
+use errors::Applicability;
 use crate::util::nodemap::{NodeMap, HirIdMap, HirIdSet};
 
 use std::collections::{BTreeMap, VecDeque};
diff --git a/src/librustc/middle/resolve_lifetime.rs b/src/librustc/middle/resolve_lifetime.rs
index f187928e0d9..0e56c1664ad 100644
--- a/src/librustc/middle/resolve_lifetime.rs
+++ b/src/librustc/middle/resolve_lifetime.rs
@@ -11,7 +11,7 @@ use crate::hir::map::Map;
 use crate::hir::{GenericArg, GenericParam, ItemLocalId, LifetimeName, Node, ParamName};
 use crate::ty::{self, DefIdTree, GenericParamDefKind, TyCtxt};
 
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use crate::rustc::lint;
 use rustc_data_structures::sync::Lrc;
 use crate::session::Session;
diff --git a/src/librustc/mir/interpret/error.rs b/src/librustc/mir/interpret/error.rs
index 870a51f95df..b0bee80e40b 100644
--- a/src/librustc/mir/interpret/error.rs
+++ b/src/librustc/mir/interpret/error.rs
@@ -11,7 +11,7 @@ use super::{RawConst, Pointer, InboundsCheck, ScalarMaybeUndef};
 use backtrace::Backtrace;
 
 use crate::ty::query::TyCtxtAt;
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 use syntax_pos::{Pos, Span};
 use syntax::ast;
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index 1a92f2c0f7a..aa5bc6e48a8 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -19,7 +19,7 @@ use syntax::parse;
 use syntax::symbol::Symbol;
 use syntax::feature_gate::UnstableFeatures;
 
-use crate::errors::{ColorConfig, FatalError, Handler};
+use errors::{ColorConfig, FatalError, Handler};
 
 use getopts;
 use std::collections::{BTreeMap, BTreeSet};
@@ -2567,7 +2567,6 @@ mod dep_tracking {
 
 #[cfg(test)]
 mod tests {
-    use crate::errors;
     use getopts;
     use crate::lint;
     use crate::middle::cstore;
diff --git a/src/librustc/session/mod.rs b/src/librustc/session/mod.rs
index 9f387e1eab1..3df76bdfa60 100644
--- a/src/librustc/session/mod.rs
+++ b/src/librustc/session/mod.rs
@@ -21,8 +21,8 @@ use rustc_data_structures::sync::{
     Ordering::SeqCst,
 };
 
-use crate::errors::{self, DiagnosticBuilder, DiagnosticId, Applicability};
-use crate::errors::emitter::{Emitter, EmitterWriter};
+use errors::{DiagnosticBuilder, DiagnosticId, Applicability};
+use errors::emitter::{Emitter, EmitterWriter};
 use syntax::ast::{self, NodeId};
 use syntax::edition::Edition;
 use syntax::feature_gate::{self, AttributeType};
diff --git a/src/librustc/traits/coherence.rs b/src/librustc/traits/coherence.rs
index 4fe7a1507f7..a1ada9fe17f 100644
--- a/src/librustc/traits/coherence.rs
+++ b/src/librustc/traits/coherence.rs
@@ -39,7 +39,7 @@ pub struct OverlapResult<'tcx> {
     pub involves_placeholder: bool,
 }
 
-pub fn add_placeholder_note(err: &mut crate::errors::DiagnosticBuilder<'_>) {
+pub fn add_placeholder_note(err: &mut errors::DiagnosticBuilder<'_>) {
     err.note(&format!(
         "this behavior recently changed as a result of a bug fix; \
          see rust-lang/rust#56105 for details"
diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs
index c17adaf1f9f..600311e6c34 100644
--- a/src/librustc/traits/error_reporting.rs
+++ b/src/librustc/traits/error_reporting.rs
@@ -17,7 +17,7 @@ use super::{
     Overflow,
 };
 
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use crate::hir;
 use crate::hir::Node;
 use crate::hir::def_id::DefId;
diff --git a/src/librustc/traits/select.rs b/src/librustc/traits/select.rs
index 1e4cd145e17..d4b656f2322 100644
--- a/src/librustc/traits/select.rs
+++ b/src/librustc/traits/select.rs
@@ -103,7 +103,7 @@ impl IntercrateAmbiguityCause {
     /// See #23980 for details.
     pub fn add_intercrate_ambiguity_hint<'a, 'tcx>(
         &self,
-        err: &mut crate::errors::DiagnosticBuilder<'_>,
+        err: &mut errors::DiagnosticBuilder<'_>,
     ) {
         err.note(&self.intercrate_ambiguity_hint());
     }
diff --git a/src/librustc/ty/context.rs b/src/librustc/ty/context.rs
index 11211c91c54..0010eb98c6b 100644
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@@ -2,7 +2,7 @@
 
 use crate::dep_graph::DepGraph;
 use crate::dep_graph::{self, DepNode, DepConstructor};
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 use crate::session::Session;
 use crate::session::config::{BorrowckMode, OutputFilenames};
 use crate::session::config::CrateType;
@@ -1819,7 +1819,7 @@ pub mod tls {
     use std::ptr;
     use syntax_pos;
     use crate::ty::query;
-    use crate::errors::{Diagnostic, TRACK_DIAGNOSTICS};
+    use errors::{Diagnostic, TRACK_DIAGNOSTICS};
     use rustc_data_structures::OnDrop;
     use rustc_data_structures::sync::{self, Lrc, Lock};
     use rustc_data_structures::thin_vec::ThinVec;
diff --git a/src/librustc/ty/error.rs b/src/librustc/ty/error.rs
index d0c9677ea6e..e3e0ce14774 100644
--- a/src/librustc/ty/error.rs
+++ b/src/librustc/ty/error.rs
@@ -4,7 +4,7 @@ use std::borrow::Cow;
 use std::fmt;
 use rustc_target::spec::abi;
 use syntax::ast;
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use syntax_pos::Span;
 
 use crate::hir;
diff --git a/src/librustc/ty/query/mod.rs b/src/librustc/ty/query/mod.rs
index d002b99f385..cc43dbd779e 100644
--- a/src/librustc/ty/query/mod.rs
+++ b/src/librustc/ty/query/mod.rs
@@ -1,5 +1,5 @@
 use crate::dep_graph::{self, DepConstructor, DepNode};
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 use crate::hir::def_id::{CrateNum, DefId, DefIndex};
 use crate::hir::def::{Def, Export};
 use crate::hir::{self, TraitCandidate, ItemLocalId, CodegenFnAttrs};
diff --git a/src/librustc/ty/query/on_disk_cache.rs b/src/librustc/ty/query/on_disk_cache.rs
index 9c9bc0f6aa1..8b6e1aae74f 100644
--- a/src/librustc/ty/query/on_disk_cache.rs
+++ b/src/librustc/ty/query/on_disk_cache.rs
@@ -1,5 +1,5 @@
 use crate::dep_graph::{DepNodeIndex, SerializedDepNodeIndex};
-use crate::errors::Diagnostic;
+use errors::Diagnostic;
 use crate::hir;
 use crate::hir::def_id::{CrateNum, DefIndex, DefId, LocalDefId, LOCAL_CRATE};
 use crate::hir::map::definitions::DefPathHash;
diff --git a/src/librustc/ty/query/plumbing.rs b/src/librustc/ty/query/plumbing.rs
index f63fbd79825..6b1fa359037 100644
--- a/src/librustc/ty/query/plumbing.rs
+++ b/src/librustc/ty/query/plumbing.rs
@@ -3,10 +3,10 @@
 //! provider, manage the caches, and so forth.
 
 use crate::dep_graph::{DepNodeIndex, DepNode, DepKind, SerializedDepNodeIndex};
-use crate::errors::DiagnosticBuilder;
-use crate::errors::Level;
-use crate::errors::Diagnostic;
-use crate::errors::FatalError;
+use errors::DiagnosticBuilder;
+use errors::Level;
+use errors::Diagnostic;
+use errors::FatalError;
 use crate::ty::tls;
 use crate::ty::{TyCtxt};
 use crate::ty::query::Query;
diff --git a/src/librustc_resolve/Cargo.toml b/src/librustc_resolve/Cargo.toml
index 0ce82f2ce52..836b4ad38ca 100644
--- a/src/librustc_resolve/Cargo.toml
+++ b/src/librustc_resolve/Cargo.toml
@@ -16,7 +16,7 @@ log = "0.4"
 syntax = { path = "../libsyntax" }
 rustc = { path = "../librustc" }
 arena = { path = "../libarena" }
-rustc_errors = { path = "../librustc_errors" }
+errors = { path = "../librustc_errors", package = "rustc_errors" }
 syntax_pos = { path = "../libsyntax_pos" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_metadata = { path = "../librustc_metadata" }
diff --git a/src/librustc_resolve/build_reduced_graph.rs b/src/librustc_resolve/build_reduced_graph.rs
index 750eb35a988..c1942c47dbb 100644
--- a/src/librustc_resolve/build_reduced_graph.rs
+++ b/src/librustc_resolve/build_reduced_graph.rs
@@ -22,7 +22,7 @@ use std::cell::Cell;
 use std::ptr;
 use rustc_data_structures::sync::Lrc;
 
-use crate::errors::Applicability;
+use errors::Applicability;
 
 use syntax::ast::{Name, Ident};
 use syntax::attr;
diff --git a/src/librustc_resolve/lib.rs b/src/librustc_resolve/lib.rs
index ad73b30ae3f..1a3eb82a48e 100644
--- a/src/librustc_resolve/lib.rs
+++ b/src/librustc_resolve/lib.rs
@@ -10,8 +10,6 @@
 
 #![deny(rust_2018_idioms)]
 
-use rustc_errors as errors;
-
 pub use rustc::hir::def::{Namespace, PerNS};
 
 use GenericParameters::*;
diff --git a/src/librustc_resolve/macros.rs b/src/librustc_resolve/macros.rs
index c8c0847a28e..74ee45abdb8 100644
--- a/src/librustc_resolve/macros.rs
+++ b/src/librustc_resolve/macros.rs
@@ -27,7 +27,7 @@ use syntax::symbol::{Symbol, keywords};
 use syntax::visit::Visitor;
 use syntax::util::lev_distance::find_best_match_for_name;
 use syntax_pos::{Span, DUMMY_SP};
-use crate::errors::Applicability;
+use errors::Applicability;
 
 use std::cell::Cell;
 use std::{mem, ptr};
diff --git a/src/libsyntax/Cargo.toml b/src/libsyntax/Cargo.toml
index f1e60ba78b7..4a0bb0302ff 100644
--- a/src/libsyntax/Cargo.toml
+++ b/src/libsyntax/Cargo.toml
@@ -15,7 +15,7 @@ serialize = { path = "../libserialize" }
 log = "0.4"
 scoped-tls = "0.1"
 syntax_pos = { path = "../libsyntax_pos" }
-rustc_errors = { path = "../librustc_errors" }
+errors = { path = "../librustc_errors", package = "rustc_errors" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_target = { path = "../librustc_target" }
 smallvec = { version = "0.6.7", features = ["union", "may_dangle"] }
diff --git a/src/libsyntax/attr/builtin.rs b/src/libsyntax/attr/builtin.rs
index 6f7761b54fc..bb44706c1e3 100644
--- a/src/libsyntax/attr/builtin.rs
+++ b/src/libsyntax/attr/builtin.rs
@@ -1,7 +1,7 @@
 //! Parsing and validation of builtin attributes
 
 use crate::ast::{self, Attribute, MetaItem, Name, NestedMetaItemKind};
-use crate::errors::{Applicability, Handler};
+use errors::{Applicability, Handler};
 use crate::feature_gate::{Features, GatedCfg};
 use crate::parse::ParseSess;
 
diff --git a/src/libsyntax/config.rs b/src/libsyntax/config.rs
index bfc4457f054..9565d02a9c2 100644
--- a/src/libsyntax/config.rs
+++ b/src/libsyntax/config.rs
@@ -9,7 +9,7 @@ use crate::feature_gate::{
 use crate::attr;
 use crate::ast;
 use crate::edition::Edition;
-use crate::errors::Applicability;
+use errors::Applicability;
 use crate::mut_visit::*;
 use crate::parse::{token, ParseSess};
 use crate::ptr::P;
diff --git a/src/libsyntax/diagnostics/plugin.rs b/src/libsyntax/diagnostics/plugin.rs
index e79378d93bd..21024eb41ef 100644
--- a/src/libsyntax/diagnostics/plugin.rs
+++ b/src/libsyntax/diagnostics/plugin.rs
@@ -15,7 +15,7 @@ use syntax_pos::Span;
 
 use crate::diagnostics::metadata::output_metadata;
 
-pub use crate::errors::*;
+pub use errors::*;
 
 // Maximum width of any line in an extended error description (inclusive).
 const MAX_DESCRIPTION_WIDTH: usize = 80;
diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index f7225810aca..5c0f391d271 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -4,7 +4,7 @@ use crate::ast::{self, Attribute, Name, PatKind, MetaItem};
 use crate::attr::HasAttrs;
 use crate::source_map::{SourceMap, Spanned, respan};
 use crate::edition::Edition;
-use crate::errors::{DiagnosticBuilder, DiagnosticId};
+use errors::{DiagnosticBuilder, DiagnosticId};
 use crate::ext::expand::{self, AstFragment, Invocation};
 use crate::ext::hygiene::{self, Mark, SyntaxContext, Transparency};
 use crate::mut_visit::{self, MutVisitor};
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 60359531b7f..c007377add0 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -3,7 +3,7 @@ use crate::ast::{MacStmtStyle, StmtKind, ItemKind};
 use crate::attr::{self, HasAttrs};
 use crate::source_map::{ExpnInfo, MacroBang, MacroAttribute, dummy_spanned, respan};
 use crate::config::StripUnconfigured;
-use crate::errors::{Applicability, FatalError};
+use errors::{Applicability, FatalError};
 use crate::ext::base::*;
 use crate::ext::derive::{add_derived_markers, collect_derives};
 use crate::ext::hygiene::{self, Mark, SyntaxContext};
diff --git a/src/libsyntax/ext/tt/macro_parser.rs b/src/libsyntax/ext/tt/macro_parser.rs
index a9000b89fb4..b69a3b428bb 100644
--- a/src/libsyntax/ext/tt/macro_parser.rs
+++ b/src/libsyntax/ext/tt/macro_parser.rs
@@ -75,7 +75,7 @@ pub use ParseResult::*;
 use TokenTreeOrTokenTreeSlice::*;
 
 use crate::ast::Ident;
-use crate::errors::FatalError;
+use errors::FatalError;
 use crate::ext::tt::quoted::{self, TokenTree};
 use crate::parse::{Directory, ParseSess};
 use crate::parse::parser::{Parser, PathStyle};
diff --git a/src/libsyntax/ext/tt/macro_rules.rs b/src/libsyntax/ext/tt/macro_rules.rs
index cc5531c4010..a3bdb3ba228 100644
--- a/src/libsyntax/ext/tt/macro_rules.rs
+++ b/src/libsyntax/ext/tt/macro_rules.rs
@@ -1,6 +1,6 @@
 use crate::{ast, attr};
 use crate::edition::Edition;
-use crate::errors::FatalError;
+use errors::FatalError;
 use crate::ext::base::{DummyResult, ExtCtxt, MacResult, SyntaxExtension};
 use crate::ext::base::{NormalTT, TTMacroExpander};
 use crate::ext::expand::{AstFragment, AstFragmentKind};
@@ -25,7 +25,7 @@ use std::borrow::Cow;
 use std::collections::hash_map::Entry;
 
 use rustc_data_structures::sync::Lrc;
-use crate::errors::Applicability;
+use errors::Applicability;
 
 const VALID_FRAGMENT_NAMES_MSG: &str = "valid fragment specifiers are \
     `ident`, `block`, `stmt`, `expr`, `pat`, `ty`, `lifetime`, `literal`, \
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 4d24c7bfb40..8f1188d2aaa 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -20,7 +20,7 @@ use crate::attr;
 use crate::early_buffered_lints::BufferedEarlyLintId;
 use crate::source_map::Spanned;
 use crate::edition::{ALL_EDITIONS, Edition};
-use crate::errors::{DiagnosticBuilder, Handler};
+use errors::{DiagnosticBuilder, Handler};
 use crate::visit::{self, FnKind, Visitor};
 use crate::parse::ParseSess;
 use crate::symbol::Symbol;
diff --git a/src/libsyntax/json.rs b/src/libsyntax/json.rs
index 2953b35298e..94b25111d9d 100644
--- a/src/libsyntax/json.rs
+++ b/src/libsyntax/json.rs
@@ -10,10 +10,10 @@
 // FIXME: spec the JSON output properly.
 
 use crate::source_map::{SourceMap, FilePathMapping};
-use crate::errors::registry::Registry;
-use crate::errors::{DiagnosticBuilder, SubDiagnostic, CodeSuggestion, SourceMapper};
-use crate::errors::{DiagnosticId, Applicability};
-use crate::errors::emitter::{Emitter, EmitterWriter};
+use errors::registry::Registry;
+use errors::{DiagnosticBuilder, SubDiagnostic, CodeSuggestion, SourceMapper};
+use errors::{DiagnosticId, Applicability};
+use errors::emitter::{Emitter, EmitterWriter};
 
 use syntax_pos::{self, MacroBacktrace, Span, SpanLabel, MultiSpan};
 use rustc_data_structures::sync::{self, Lrc};
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index c844f9e2a91..e0557147f9a 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -25,7 +25,7 @@
 #[allow(unused_extern_crates)]
 extern crate serialize as rustc_serialize; // used by deriving
 
-pub use rustc_errors as errors;
+pub use errors;
 use rustc_data_structures::sync::Lock;
 use rustc_data_structures::bit_set::GrowableBitSet;
 pub use rustc_data_structures::thin_vec::ThinVec;
@@ -38,7 +38,7 @@ use ast::AttrId;
 macro_rules! panictry {
     ($e:expr) => ({
         use std::result::Result::{Ok, Err};
-        use crate::errors::FatalError;
+        use errors::FatalError;
         match $e {
             Ok(e) => e,
             Err(mut e) => {
@@ -53,7 +53,7 @@ macro_rules! panictry {
 macro_rules! panictry_buffer {
     ($handler:expr, $e:expr) => ({
         use std::result::Result::{Ok, Err};
-        use crate::errors::{FatalError, DiagnosticBuilder};
+        use errors::{FatalError, DiagnosticBuilder};
         match $e {
             Ok(e) => e,
             Err(errs) => {
diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index d3fc1c03634..1634cbfc156 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -1,6 +1,6 @@
 use crate::ast::{self, Ident};
 use crate::source_map::{SourceMap, FilePathMapping};
-use crate::errors::{Applicability, FatalError, Diagnostic, DiagnosticBuilder};
+use errors::{Applicability, FatalError, Diagnostic, DiagnosticBuilder};
 use crate::parse::{token, ParseSess};
 use crate::symbol::{Symbol, keywords};
 
@@ -1882,7 +1882,6 @@ mod tests {
     use crate::ast::{Ident, CrateConfig};
     use crate::symbol::Symbol;
     use crate::source_map::SourceMap;
-    use crate::errors;
     use crate::feature_gate::UnstableFeatures;
     use crate::parse::token;
     use crate::diagnostics::plugin::ErrorMap;
diff --git a/src/libsyntax/parse/lexer/unicode_chars.rs b/src/libsyntax/parse/lexer/unicode_chars.rs
index 75862178169..7da4284c0e4 100644
--- a/src/libsyntax/parse/lexer/unicode_chars.rs
+++ b/src/libsyntax/parse/lexer/unicode_chars.rs
@@ -2,7 +2,7 @@
 // http://www.unicode.org/Public/security/10.0.0/confusables.txt
 
 use syntax_pos::{Span, NO_EXPANSION};
-use crate::errors::{Applicability, DiagnosticBuilder};
+use errors::{Applicability, DiagnosticBuilder};
 use super::StringReader;
 
 const UNICODE_ARRAY: &[(char, &str, char)] = &[
diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index 317d6933207..1ac3d8ec781 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -3,7 +3,7 @@
 use crate::ast::{self, CrateConfig, NodeId};
 use crate::early_buffered_lints::{BufferedEarlyLint, BufferedEarlyLintId};
 use crate::source_map::{SourceMap, FilePathMapping};
-use crate::errors::{FatalError, Level, Handler, ColorConfig, Diagnostic, DiagnosticBuilder};
+use errors::{FatalError, Level, Handler, ColorConfig, Diagnostic, DiagnosticBuilder};
 use crate::feature_gate::UnstableFeatures;
 use crate::parse::parser::Parser;
 use crate::symbol::Symbol;
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 69d6407d506..8db8c253bad 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -33,7 +33,7 @@ use crate::ast::{RangeEnd, RangeSyntax};
 use crate::{ast, attr};
 use crate::ext::base::DummyResult;
 use crate::source_map::{self, SourceMap, Spanned, respan};
-use crate::errors::{self, Applicability, DiagnosticBuilder, DiagnosticId};
+use errors::{Applicability, DiagnosticBuilder, DiagnosticId};
 use crate::parse::{self, SeqSep, classify, token};
 use crate::parse::lexer::{TokenAndSpan, UnmatchedBrace};
 use crate::parse::lexer::comments::{doc_comment_style, strip_doc_comment_decoration};
diff --git a/src/libsyntax/show_span.rs b/src/libsyntax/show_span.rs
index 2c32771266e..5e0cf9eea78 100644
--- a/src/libsyntax/show_span.rs
+++ b/src/libsyntax/show_span.rs
@@ -6,7 +6,6 @@
 use std::str::FromStr;
 
 use crate::ast;
-use crate::errors;
 use crate::visit;
 use crate::visit::Visitor;
 
diff --git a/src/libsyntax/source_map.rs b/src/libsyntax/source_map.rs
index 552a3d30261..d33415eb68a 100644
--- a/src/libsyntax/source_map.rs
+++ b/src/libsyntax/source_map.rs
@@ -24,7 +24,7 @@ use std::fs;
 use std::io;
 use log::debug;
 
-use crate::errors::SourceMapper;
+use errors::SourceMapper;
 
 /// Return the span itself if it doesn't come from a macro expansion,
 /// otherwise return the call site span up to the `enclosing_sp` by
diff --git a/src/libsyntax/test.rs b/src/libsyntax/test.rs
index f45bf034ba2..6506546b3b2 100644
--- a/src/libsyntax/test.rs
+++ b/src/libsyntax/test.rs
@@ -16,7 +16,7 @@ use syntax_pos::{self, DUMMY_SP, NO_EXPANSION, Span, SourceFile, BytePos};
 
 use crate::attr::{self, HasAttrs};
 use crate::source_map::{self, SourceMap, ExpnInfo, MacroAttribute, dummy_spanned, respan};
-use crate::errors;
+use errors;
 use crate::config;
 use crate::entry::{self, EntryPointType};
 use crate::ext::base::{ExtCtxt, Resolver};
diff --git a/src/libsyntax/test_snippet.rs b/src/libsyntax/test_snippet.rs
index add4d2bead1..e9ea39b83d4 100644
--- a/src/libsyntax/test_snippet.rs
+++ b/src/libsyntax/test_snippet.rs
@@ -1,6 +1,6 @@
 use crate::source_map::{SourceMap, FilePathMapping};
-use crate::errors::Handler;
-use crate::errors::emitter::EmitterWriter;
+use errors::Handler;
+use errors::emitter::EmitterWriter;
 use crate::with_globals;
 
 use std::io;
diff --git a/src/libsyntax_ext/Cargo.toml b/src/libsyntax_ext/Cargo.toml
index c22b55b8c13..773f0948a8a 100644
--- a/src/libsyntax_ext/Cargo.toml
+++ b/src/libsyntax_ext/Cargo.toml
@@ -11,7 +11,7 @@ crate-type = ["dylib"]
 
 [dependencies]
 fmt_macros = { path = "../libfmt_macros" }
-rustc_errors = { path = "../librustc_errors" }
+errors = { path = "../librustc_errors", package = "rustc_errors" }
 syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
 rustc_data_structures = { path = "../librustc_data_structures" }
diff --git a/src/libsyntax_ext/asm.rs b/src/libsyntax_ext/asm.rs
index ebcdceea7c5..8edd0e1ae38 100644
--- a/src/libsyntax_ext/asm.rs
+++ b/src/libsyntax_ext/asm.rs
@@ -4,7 +4,7 @@ use State::*;
 
 use rustc_data_structures::thin_vec::ThinVec;
 
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 use syntax::ast;
 use syntax::ext::base::{self, *};
diff --git a/src/libsyntax_ext/assert.rs b/src/libsyntax_ext/assert.rs
index 984ef26f5ab..d2c397e0ecc 100644
--- a/src/libsyntax_ext/assert.rs
+++ b/src/libsyntax_ext/assert.rs
@@ -1,4 +1,4 @@
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 use syntax::ast::{self, *};
 use syntax::source_map::Spanned;
diff --git a/src/libsyntax_ext/cfg.rs b/src/libsyntax_ext/cfg.rs
index e2104550878..090d730289d 100644
--- a/src/libsyntax_ext/cfg.rs
+++ b/src/libsyntax_ext/cfg.rs
@@ -2,7 +2,7 @@
 /// a literal `true` or `false` based on whether the given cfg matches the
 /// current compilation environment.
 
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 use syntax::ast;
 use syntax::ext::base::{self, *};
diff --git a/src/libsyntax_ext/deriving/custom.rs b/src/libsyntax_ext/deriving/custom.rs
index 7d9b8402cac..81fcdc4be2b 100644
--- a/src/libsyntax_ext/deriving/custom.rs
+++ b/src/libsyntax_ext/deriving/custom.rs
@@ -1,4 +1,4 @@
-use crate::errors::FatalError;
+use errors::FatalError;
 use crate::proc_macro_impl::EXEC_STRATEGY;
 use crate::proc_macro_server;
 
diff --git a/src/libsyntax_ext/format.rs b/src/libsyntax_ext/format.rs
index 1b17fc0d040..a27630a714c 100644
--- a/src/libsyntax_ext/format.rs
+++ b/src/libsyntax_ext/format.rs
@@ -3,8 +3,8 @@ use Position::*;
 
 use fmt_macros as parse;
 
-use crate::errors::DiagnosticBuilder;
-use crate::errors::Applicability;
+use errors::DiagnosticBuilder;
+use errors::Applicability;
 
 use syntax::ast;
 use syntax::ext::base::{self, *};
diff --git a/src/libsyntax_ext/global_asm.rs b/src/libsyntax_ext/global_asm.rs
index 14dbd930023..2baf530aeda 100644
--- a/src/libsyntax_ext/global_asm.rs
+++ b/src/libsyntax_ext/global_asm.rs
@@ -8,7 +8,7 @@
 /// LLVM's `module asm "some assembly here"`. All of LLVM's caveats
 /// therefore apply.
 
-use crate::errors::DiagnosticBuilder;
+use errors::DiagnosticBuilder;
 
 use syntax::ast;
 use syntax::source_map::respan;
diff --git a/src/libsyntax_ext/lib.rs b/src/libsyntax_ext/lib.rs
index 05c8084a51e..69f9e2c5eb0 100644
--- a/src/libsyntax_ext/lib.rs
+++ b/src/libsyntax_ext/lib.rs
@@ -17,8 +17,6 @@
 
 extern crate proc_macro;
 
-use rustc_errors as errors;
-
 mod diagnostics;
 
 mod asm;
diff --git a/src/libsyntax_ext/proc_macro_decls.rs b/src/libsyntax_ext/proc_macro_decls.rs
index 5730081ce01..d8f8decef39 100644
--- a/src/libsyntax_ext/proc_macro_decls.rs
+++ b/src/libsyntax_ext/proc_macro_decls.rs
@@ -1,7 +1,6 @@
 use std::mem;
 
 use crate::deriving;
-use crate::errors;
 
 use syntax::ast::{self, Ident};
 use syntax::attr;
diff --git a/src/libsyntax_ext/proc_macro_impl.rs b/src/libsyntax_ext/proc_macro_impl.rs
index 88e20e3dc7c..03290df0c72 100644
--- a/src/libsyntax_ext/proc_macro_impl.rs
+++ b/src/libsyntax_ext/proc_macro_impl.rs
@@ -1,4 +1,4 @@
-use crate::errors::FatalError;
+use errors::FatalError;
 use crate::proc_macro_server;
 
 use syntax::source_map::Span;
diff --git a/src/libsyntax_ext/proc_macro_server.rs b/src/libsyntax_ext/proc_macro_server.rs
index 2158cfc089b..fd82dac5ab6 100644
--- a/src/libsyntax_ext/proc_macro_server.rs
+++ b/src/libsyntax_ext/proc_macro_server.rs
@@ -1,4 +1,4 @@
-use crate::errors::{self, Diagnostic, DiagnosticBuilder};
+use errors::{Diagnostic, DiagnosticBuilder};
 
 use std::panic;