remove span_fatal from ast_lowering

compiler/rustc_ast_lowering/src/errors.rs

@@ -327,3 +327,10 @@ pub struct ArbitraryExpressionInPattern {
     #[primary_span]
     pub span: Span,
 }
+
+#[derive(SessionDiagnostic, Clone, Copy)]
+#[diag(ast_lowering::inclusive_range_with_no_end)]
+pub struct InclusiveRangeWithNoEnd {
+    #[primary_span]
+    pub span: Span,
+}

compiler/rustc_ast_lowering/src/expr.rs

@@ -1,8 +1,8 @@
 use super::errors::{
     AsyncGeneratorsNotSupported, AsyncNonMoveClosureNotSupported, AwaitOnlyInAsyncFnAndBlocks,
     BaseExpressionDoubleDot, ClosureCannotBeStatic, FunctionalRecordUpdateDestructuringAssignemnt,
-    GeneratorTooManyParameters, NotSupportedForLifetimeBinderAsyncClosure, RustcBoxAttributeError,
+    GeneratorTooManyParameters, InclusiveRangeWithNoEnd, NotSupportedForLifetimeBinderAsyncClosure,
-    UnderscoreExprLhsAssign,
+    RustcBoxAttributeError, UnderscoreExprLhsAssign,
 };
 use super::ResolverAstLoweringExt;
 use super::{ImplTraitContext, LoweringContext, ParamMode, ParenthesizedGenericArgs};
@@ -1264,7 +1264,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
             (Some(..), Some(..), HalfOpen) => hir::LangItem::Range,
             (None, Some(..), Closed) => hir::LangItem::RangeToInclusive,
             (Some(..), Some(..), Closed) => unreachable!(),
-            (_, None, Closed) => self.diagnostic().span_fatal(span, "inclusive range with no end"),
+            (_, None, Closed) => self.tcx.sess.emit_fatal(InclusiveRangeWithNoEnd { span }),
         };
 
         let fields = self.arena.alloc_from_iter(

compiler/rustc_ast_lowering/src/lib.rs

@@ -35,6 +35,8 @@
 #![feature(never_type)]
 #![recursion_limit = "256"]
 #![allow(rustc::potential_query_instability)]
+#![deny(rustc::untranslatable_diagnostic)]
+#![deny(rustc::diagnostic_outside_of_impl)]
 
 #[macro_use]
 extern crate tracing;

compiler/rustc_error_messages/locales/en-US/ast_lowering.ftl

@@ -129,3 +129,5 @@ ast_lowering_not_supported_for_lifetime_binder_async_closure =
 
 ast_lowering_arbitrary_expression_in_pattern =
     arbitrary expressions aren't allowed in patterns
+
+ast_lowering_inclusive_range_with_no_end = inclusive range with no end