[FIR] Fixed Replace ConeTypeVariable on ConeTypeParameter ^KT-51017

in AbstractConeCallConflictResolver.computeParameterTypes

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java

@@ -2646,6 +2646,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceAssignmentToVar.kt");
             }
 
+            @Test
+            @TestMetadata("callableReferenceWithMostSpecificGenericTypeParameter.kt")
+            public void testCallableReferenceWithMostSpecificGenericTypeParameter() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.kt");
+            }
+
             @Test
             @TestMetadata("classVsPackage.kt")
             public void testClassVsPackage() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java

@@ -2646,6 +2646,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                 runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceAssignmentToVar.kt");
             }
 
+            @Test
+            @TestMetadata("callableReferenceWithMostSpecificGenericTypeParameter.kt")
+            public void testCallableReferenceWithMostSpecificGenericTypeParameter() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.kt");
+            }
+
             @Test
             @TestMetadata("classVsPackage.kt")
             public void testClassVsPackage() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java

@@ -2646,6 +2646,12 @@ public class FirOldFrontendDiagnosticsWithLightTreeTestGenerated extends Abstrac
                 runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceAssignmentToVar.kt");
             }
 
+            @Test
+            @TestMetadata("callableReferenceWithMostSpecificGenericTypeParameter.kt")
+            public void testCallableReferenceWithMostSpecificGenericTypeParameter() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.kt");
+            }
+
             @Test
             @TestMetadata("classVsPackage.kt")
             public void testClassVsPackage() throws Exception {

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

@@ -7,12 +7,17 @@ package org.jetbrains.kotlin.fir.resolve.calls
 
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.utils.isExpect
+import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
+import org.jetbrains.kotlin.fir.diagnostics.DiagnosticKind
 import org.jetbrains.kotlin.fir.resolve.inference.InferenceComponents
+import org.jetbrains.kotlin.fir.symbols.ConeTypeParameterLookupTag
 import org.jetbrains.kotlin.fir.types.*
+import org.jetbrains.kotlin.fir.types.impl.ConeTypeParameterTypeImpl
 import org.jetbrains.kotlin.name.StandardClassIds
 import org.jetbrains.kotlin.resolve.calls.results.*
 import org.jetbrains.kotlin.types.model.KotlinTypeMarker
 import org.jetbrains.kotlin.types.model.requireOrDescribe
+import org.jetbrains.kotlin.utils.addIfNotNull
 
 abstract class AbstractConeCallConflictResolver(
     private val specificityComparator: TypeSpecificityComparator,
@@ -160,9 +165,28 @@ abstract class AbstractConeCallConflictResolver(
         call: Candidate,
         function: FirFunction
     ): List<ConeKotlinType> {
-        return listOfNotNull(function.receiverTypeRef?.coneType) +
+        return buildList {
-                (call.resultingTypeForCallableReference?.typeArguments?.map { it as ConeKotlinType }
+            addIfNotNull(function.receiverTypeRef?.coneType)
-                    ?: call.argumentMapping?.map { it.value.argumentType() }.orEmpty())
+            val typeForCallableReference = call.resultingTypeForCallableReference
+            if (typeForCallableReference != null) {
+                typeForCallableReference.typeArguments
+                    .mapTo(this) {
+                        when (it) {
+                            is ConeTypeVariableType -> {
+                                val typeParameterLookupTag = it.lookupTag.originalTypeParameter as ConeTypeParameterLookupTag?
+                                if (typeParameterLookupTag == null) {
+                                    ConeErrorType(ConeSimpleDiagnostic("no type parameter for type variable", DiagnosticKind.Other))
+                                } else {
+                                    ConeTypeParameterTypeImpl(typeParameterLookupTag, it.isNullable)
+                                }
+                            }
+                            else -> it as ConeKotlinType
+                        }
+                    }
+            } else {
+                call.argumentMapping?.mapTo(this) { it.value.argumentType() }
+            }
+        }
     }
 
     private fun createFlatSignature(call: Candidate, klass: FirClassLikeDeclaration): FlatSignature<Candidate> {

compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.kt

@@ -0,0 +1,12 @@
+// FIR_IDENTICAL
+// ISSUE: KT-51017
+
+interface A
+interface B : A
+
+fun <V : A> V.foo(): V = this
+fun <T : B> T.foo(): T = this
+
+fun test(list: List<B>) {
+    B::foo // No ambiguity, T.foo wins
+}

compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.txt

@@ -0,0 +1,17 @@
+package
+
+public fun test(/*0*/ list: kotlin.collections.List<B>): kotlin.Unit
+public fun </*0*/ T : B> T.foo(): T
+public fun </*0*/ V : A> V.foo(): V
+
+public interface A {
+    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 interface B : A {
+    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/testData/diagnostics/tests/callableReference/generic/kt11075.fir.kt

@@ -1,10 +0,0 @@
-// KT-11075 NONE_APPLICABLE reported for callable reference to an overloaded generic function with expected type provided
-
-object TestCallableReferences {
-    fun <A> foo(x: A) = x
-    fun <B> foo(x: List<B>) = x
-
-    fun test0(): (String) -> String = TestCallableReferences::foo
-
-    fun <T> test1(): (List<T>) -> List<T> = TestCallableReferences::<!OVERLOAD_RESOLUTION_AMBIGUITY!>foo<!>
-}

compiler/testData/diagnostics/tests/callableReference/generic/kt11075.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // KT-11075 NONE_APPLICABLE reported for callable reference to an overloaded generic function with expected type provided
 
 object TestCallableReferences {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java

@@ -2652,6 +2652,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceAssignmentToVar.kt");
             }
 
+            @Test
+            @TestMetadata("callableReferenceWithMostSpecificGenericTypeParameter.kt")
+            public void testCallableReferenceWithMostSpecificGenericTypeParameter() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/callableReference/callableReferenceWithMostSpecificGenericTypeParameter.kt");
+            }
+
             @Test
             @TestMetadata("classVsPackage.kt")
             public void testClassVsPackage() throws Exception {