FIR: keep names for error references

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirRenderer.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.expressions.impl.FirElseIfTrueCondition
 import org.jetbrains.kotlin.fir.expressions.impl.FirExpressionStub
 import org.jetbrains.kotlin.fir.expressions.impl.FirUnitExpression
+import org.jetbrains.kotlin.fir.references.FirErrorNamedReference
 import org.jetbrains.kotlin.fir.symbols.ConeCallableSymbol
 import org.jetbrains.kotlin.fir.symbols.ConeClassLikeSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirFunctionSymbol
@@ -761,7 +762,11 @@ class FirRenderer(builder: StringBuilder) : FirVisitorVoid() {
     }
 
     override fun visitNamedReference(namedReference: FirNamedReference) {
-        print("${namedReference.name}#")
+        if (namedReference is FirErrorNamedReference) {
+            print("<${namedReference.errorReason}>#")
+        } else {
+            print("${namedReference.name}#")
+        }
     }
 
     override fun visitResolvedCallableReference(resolvedCallableReference: FirResolvedCallableReference) {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/references/FirErrorNamedReference.kt

@@ -14,7 +14,6 @@ import org.jetbrains.kotlin.name.Name
 class FirErrorNamedReference(
     session: FirSession,
     psi: PsiElement?,
-    val errorReason: String
-) : FirAbstractElement(session, psi), FirNamedReference {
+    val errorReason: String,
     override val name: Name = Name.special("<$errorReason>")
-}
+) : FirAbstractElement(session, psi), FirNamedReference