Make fatal DiagnosticBuilder yield never

compiler/rustc_monomorphize/src/collector.rs

@@ -180,7 +180,6 @@
 
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::sync::{par_iter, MTLock, MTRef, ParallelIterator};
-use rustc_errors::FatalError;
 use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, DefIdMap, LocalDefId, LOCAL_CRATE};
 use rustc_hir::itemlikevisit::ItemLikeVisitor;
@@ -560,8 +559,7 @@ fn check_recursion_limit<'tcx>(
         if let Some(path) = written_to_path {
             err.note(&format!("the full type name has been written to '{}'", path.display()));
         }
-        err.emit();
-        FatalError.raise();
+        err.emit()
     }
 
     recursion_depths.insert(def_id, recursion_depth + 1);
@@ -598,8 +596,7 @@ fn check_type_length_limit<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) {
             "consider adding a `#![type_length_limit=\"{}\"]` attribute to your crate",
             type_length
         ));
-        diag.emit();
-        tcx.sess.abort_if_errors();
+        diag.emit()
     }
 }