[FIR] Only let supertypes of ILTs include Number when it's not unsigned

#KT-64607 Fixed

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java

@@ -39266,6 +39266,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                 runTest("compiler/testData/diagnostics/tests/unsignedTypes/lateinitUnsignedType.kt");
             }
 
+            @Test
+            @TestMetadata("numberReceiverNotValid.kt")
+            public void testNumberReceiverNotValid() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt");
+            }
+
             @Test
             @TestMetadata("overloadResolutionOfBasicOperations.kt")
             public void testOverloadResolutionOfBasicOperations() throws Exception {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java

@@ -39266,6 +39266,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                 runTest("compiler/testData/diagnostics/tests/unsignedTypes/lateinitUnsignedType.kt");
             }
 
+            @Test
+            @TestMetadata("numberReceiverNotValid.kt")
+            public void testNumberReceiverNotValid() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt");
+            }
+
             @Test
             @TestMetadata("overloadResolutionOfBasicOperations.kt")
             public void testOverloadResolutionOfBasicOperations() throws Exception {

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

@@ -36992,6 +36992,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                 runTest("compiler/testData/diagnostics/tests/unsignedTypes/lateinitUnsignedType.kt");
             }
 
+            @Test
+            @TestMetadata("numberReceiverNotValid.kt")
+            public void testNumberReceiverNotValid() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt");
+            }
+
             @Test
             @TestMetadata("overloadResolutionOfBasicOperations.kt")
             public void testOverloadResolutionOfBasicOperations() throws Exception {

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

@@ -37112,6 +37112,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                 runTest("compiler/testData/diagnostics/tests/unsignedTypes/lateinitUnsignedType.kt");
             }
 
+            @Test
+            @TestMetadata("numberReceiverNotValid.kt")
+            public void testNumberReceiverNotValid() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt");
+            }
+
             @Test
             @TestMetadata("overloadResolutionOfBasicOperations.kt")
             public void testOverloadResolutionOfBasicOperations() throws Exception {

compiler/fir/tree/src/org/jetbrains/kotlin/fir/types/ConeIntegerLiteralTypeImpl.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.StandardClassIds
 import org.jetbrains.kotlin.types.AbstractTypeChecker
 import org.jetbrains.kotlin.types.model.SimpleTypeMarker
+import org.jetbrains.kotlin.utils.addToStdlib.runIf
 
 class ConeIntegerLiteralConstantTypeImpl(
     value: Long,
@@ -139,10 +140,17 @@ fun ConeKotlinType.approximateIntegerLiteralType(expectedType: ConeKotlinType? =
 
 private object ConeIntegerLiteralTypeExtensions {
     fun createSupertypeList(type: ConeIntegerLiteralType): List<ConeClassLikeType> {
-        return listOf(
-            createClassLikeType(StandardClassIds.Number),
+        val comparableSuperType =
             ConeClassLikeTypeImpl(StandardClassIds.Comparable.toLookupTag(), arrayOf(ConeKotlinTypeProjectionIn(type)), false)
-        )
+
+        return if (type.possibleTypes.none { it.isUnsignedTypeOrNullableUnsignedType }) {
+            listOf(
+                createClassLikeType(StandardClassIds.Number),
+                comparableSuperType,
+            )
+        } else {
+            listOf(comparableSuperType)
+        }
     }
 
     fun createClassLikeType(classId: ClassId): ConeClassLikeType {

compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt

@@ -0,0 +1,18 @@
+// FIR_IDENTICAL
+// WITH_STDLIB
+// LANGUAGE: +ContextReceivers
+// ISSUE: KT-64607
+
+val Number.a get() = ""
+fun Number.b() = ""
+context(Number) val c get() = ""
+context(Number) fun d() = ""
+
+fun test() {
+    2U.<!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>a<!>
+    2U.<!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>b<!>()
+    with (2U) {
+        <!NO_CONTEXT_RECEIVER!>c<!>
+        <!NO_CONTEXT_RECEIVER!>d<!>()
+    }
+}

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

@@ -39266,6 +39266,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/unsignedTypes/lateinitUnsignedType.kt");
             }
 
+            @Test
+            @TestMetadata("numberReceiverNotValid.kt")
+            public void testNumberReceiverNotValid() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/unsignedTypes/numberReceiverNotValid.kt");
+            }
+
             @Test
             @TestMetadata("overloadResolutionOfBasicOperations.kt")
             public void testOverloadResolutionOfBasicOperations() throws Exception {