FIR: Use attribute instead of overriddenSymbol for synthetic type alias constructor

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/ConversionUtils.kt

@@ -225,6 +225,11 @@ internal tailrec fun FirCallableSymbol<*>.unwrapSubstitutionAndIntersectionOverr
 }
 
 internal tailrec fun FirCallableSymbol<*>.unwrapCallRepresentative(root: FirCallableSymbol<*> = this): FirCallableSymbol<*> {
+    val fir = fir
+    if (fir is FirConstructor) {
+        val originalForTypeAlias = fir.originalConstructorIfTypeAlias
+        if (originalForTypeAlias != null) return originalForTypeAlias.symbol.unwrapCallRepresentative(this)
+    }
     if (fir.isIntersectionOverride) return this
 
     val overriddenSymbol = fir.originalForSubstitutionOverride?.takeIf {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/ConstructorProcessing.kt

@@ -232,7 +232,7 @@ private fun prepareSubstitutingScopeForTypeAliasConstructors(
     typeAliasSymbol: FirTypeAliasSymbol,
     session: FirSession,
     delegatingScope: FirScope
-): FirScope? {
+): FirScope {
     val copyFactory2: ConstructorCopyFactory<FirConstructor> = factory@{ newReturnType, newParameterTypes, newTypeParameters ->
         buildConstructor {
             source = this@factory.source
@@ -329,7 +329,9 @@ private fun prepareCopyConstructorForTypealiasNestedClass(
                 val extCopy = buildConstructorCopy(originalSymbol.fir) {
                     origin = FirDeclarationOrigin.Synthetic
                     receiverTypeRef = innerTypeRef.withReplacedConeType(outerType)
-                    symbol = FirConstructorSymbol(originalSymbol.callableId, overriddenSymbol = originalSymbol)
+                    symbol = FirConstructorSymbol(originalSymbol.callableId)
+                }.apply {
+                    originalConstructorIfTypeAlias = originalSymbol.fir
                 }
                 return extCopy.symbol
             }
@@ -337,3 +339,6 @@ private fun prepareCopyConstructorForTypealiasNestedClass(
     }
     return null
 }
+
+private object TypeAliasConstructorKey : FirDeclarationDataKey()
+var FirConstructor.originalConstructorIfTypeAlias: FirConstructor? by FirDeclarationDataRegistry.data(TypeAliasConstructorKey)