[NI] Create error type for CST of error types

KT-36092 Fixed

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirOldFrontendDiagnosticsTestGenerated.java

@@ -9866,6 +9866,11 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirOldFronte
             runTest("compiler/testData/diagnostics/tests/inference/coerceFunctionLiteralToSuspend.kt");
         }
 
+        @TestMetadata("commonSuperTypeOfErrorTypes.kt")
+        public void testCommonSuperTypeOfErrorTypes() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt");
+        }
+
         @TestMetadata("completeInferenceIfManyFailed.kt")
         public void testCompleteInferenceIfManyFailed() throws Exception {
             runTest("compiler/testData/diagnostics/tests/inference/completeInferenceIfManyFailed.kt");

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/NewCommonSuperTypeCalculator.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.types.AbstractFlexibilityChecker.hasDifferentFlexibi
 import org.jetbrains.kotlin.types.AbstractNullabilityChecker.hasPathByNotMarkedNullableNodes
 import org.jetbrains.kotlin.types.checker.SimpleClassicTypeSystemContext
 import org.jetbrains.kotlin.types.model.*
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 object NewCommonSuperTypeCalculator {
     // TODO: Bridge for old calls
@@ -96,6 +97,10 @@ object NewCommonSuperTypeCalculator {
         contextStubTypesEqualToAnything: AbstractTypeCheckerContext,
         contextStubTypesNotEqual: AbstractTypeCheckerContext
     ): SimpleTypeMarker {
+        if (types.all { it is ErrorType }) {
+            return ErrorUtils.createErrorType("CST(${types.joinToString()}")
+        }
+
         // i.e. result type also should be marked nullable
         val notAllNotNull =
             types.any { !isStubRelatedType(it) && !AbstractNullabilityChecker.isSubtypeOfAny(contextStubTypesEqualToAnything, it) }

compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.fir.kt

@@ -0,0 +1,21 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNCHECKED_CAST
+
+class Foo<T>
+class Bar<S>
+
+fun <T> consume(x: Foo<out T>, y: Foo<out T>) {}
+fun <T> materialize() = null as T
+
+fun test() {
+    consume(
+        materialize<Foo<Bar<ErrorType>>>(),
+        materialize<Foo<Bar<ErrorType>>>()
+    )
+
+    <!INAPPLICABLE_CANDIDATE!>consume<!>(
+        materialize<Foo<Bar<ErrorType>>>(),
+        materialize<Foo<ErrorType>>()
+    )
+
+}

compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt

@@ -0,0 +1,21 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNCHECKED_CAST
+
+class Foo<T>
+class Bar<S>
+
+fun <T> consume(x: Foo<out T>, y: Foo<out T>) {}
+fun <T> materialize() = null as T
+
+fun test() {
+    consume(
+        materialize<Foo<Bar<<!UNRESOLVED_REFERENCE!>ErrorType<!>>>>(),
+        materialize<Foo<Bar<<!UNRESOLVED_REFERENCE!>ErrorType<!>>>>()
+    )
+
+    consume(
+        materialize<Foo<Bar<<!UNRESOLVED_REFERENCE!>ErrorType<!>>>>(),
+        materialize<Foo<<!UNRESOLVED_REFERENCE!>ErrorType<!>>>()
+    )
+
+}

compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.txt

@@ -0,0 +1,19 @@
+package
+
+public fun </*0*/ T> consume(/*0*/ x: Foo<out T>, /*1*/ y: Foo<out T>): kotlin.Unit
+public fun </*0*/ T> materialize(): T
+public fun test(): kotlin.Unit
+
+public final class Bar</*0*/ S> {
+    public constructor Bar</*0*/ S>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Foo</*0*/ T> {
+    public constructor Foo</*0*/ T>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -9873,6 +9873,11 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 runTest("compiler/testData/diagnostics/tests/inference/coerceFunctionLiteralToSuspend.kt");
             }
 
+            @TestMetadata("commonSuperTypeOfErrorTypes.kt")
+            public void testCommonSuperTypeOfErrorTypes() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt");
+            }
+
             @TestMetadata("completeInferenceIfManyFailed.kt")
             public void testCompleteInferenceIfManyFailed() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/inference/completeInferenceIfManyFailed.kt");

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsUsingJavacTestGenerated.java

@@ -9868,6 +9868,11 @@ public class DiagnosticsUsingJavacTestGenerated extends AbstractDiagnosticsUsing
                 runTest("compiler/testData/diagnostics/tests/inference/coerceFunctionLiteralToSuspend.kt");
             }
 
+            @TestMetadata("commonSuperTypeOfErrorTypes.kt")
+            public void testCommonSuperTypeOfErrorTypes() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/inference/commonSuperTypeOfErrorTypes.kt");
+            }
+
             @TestMetadata("completeInferenceIfManyFailed.kt")
             public void testCompleteInferenceIfManyFailed() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/inference/completeInferenceIfManyFailed.kt");