[FE 1.0] Fix subtyping for captured integer literal types

^KT-50877 Fixed

core/compiler.common/src/org/jetbrains/kotlin/types/AbstractTypeChecker.kt

@@ -313,8 +313,16 @@ object AbstractTypeChecker {
                     && typeConstructor.supertypes().any { it.asSimpleType()?.isIntegerLiteralType() == true }
         }
 
+        fun isCapturedIntegerLiteralType(type: SimpleTypeMarker): Boolean {
+            if (type !is CapturedTypeMarker) return false
+            val projection = type.typeConstructor().projection()
+            return !projection.isStarProjection() && projection.getType().upperBoundIfFlexible().isIntegerLiteralType()
+        }
+
+        fun isIntegerLiteralTypeOrCapturedOne(type: SimpleTypeMarker) = type.isIntegerLiteralType() || isCapturedIntegerLiteralType(type)
+
         when {
-            subType.isIntegerLiteralType() && superType.isIntegerLiteralType() -> {
+            isIntegerLiteralTypeOrCapturedOne(subType) && isIntegerLiteralTypeOrCapturedOne(superType) -> {
                 return true
             }
 

core/descriptors/src/org/jetbrains/kotlin/types/checker/ClassicTypeSystemContext.kt

@@ -900,6 +900,8 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
     override fun KotlinTypeMarker.isTypeVariableType(): Boolean {
         return this is UnwrappedType && constructor is NewTypeVariableConstructor
     }
+
+    class WA // Workaround for KT-52313
 }
 
 fun TypeVariance.convertVariance(): Variance {