[FIR] Fix disappeared CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON

^KT-59965 Fixed

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirImportsChecker.kt

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.fir.analysis.checkers.declaration
 import org.jetbrains.kotlin.KtFakeSourceElement
 import org.jetbrains.kotlin.KtFakeSourceElementKind
 import org.jetbrains.kotlin.descriptors.Visibilities
+import org.jetbrains.kotlin.descriptors.isObject
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.reportOn
 import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
@@ -41,7 +42,9 @@ object FirImportsChecker : FirFileChecker() {
         declaration.imports.forEach { import ->
             if (import is FirErrorImport) return@forEach
             if (import.isAllUnder) {
-                if (import !is FirResolvedImport) {
+                if (import is FirResolvedImport) {
+                    checkAllUnderFromObject(import, context, reporter)
+                } else {
                     checkAllUnderFromEnumEntry(import, context, reporter)
                 }
             } else {
@@ -65,6 +68,16 @@ object FirImportsChecker : FirFileChecker() {
         }
     }
 
+    private fun checkAllUnderFromObject(import: FirImport, context: CheckerContext, reporter: DiagnosticReporter) {
+        val fqName = import.importedFqName ?: return
+        if (fqName.isRoot) return
+        val classId = ClassId.topLevel(fqName)
+        val classSymbol = classId.resolveToClass(context) ?: return
+        if (classSymbol.classKind.isObject) {
+            reporter.reportOn(import.source, FirErrors.CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON, classSymbol.classId.shortClassName, context)
+        }
+    }
+
     private fun checkCanBeImported(import: FirImport, context: CheckerContext, reporter: DiagnosticReporter) {
         val importedFqName = import.importedFqName ?: return
         val importedName = importedFqName.shortName()

compiler/testData/diagnostics/tests/typealias/starImportOnTypeAlias.fir.kt

@@ -1,28 +0,0 @@
-// FILE: foo.kt
-
-package test
-
-typealias ClassAlias = ClassSample
-typealias ObjectAlias = ObjectSample
-typealias EnumAlias = EnumSample
-
-class ClassSample
-
-object ObjectSample
-
-enum class EnumSample {
-    Entry;
-}
-
-// FILE: bar.kt
-
-import test.ClassAlias.*
-import test.ObjectAlias.*
-import test.EnumAlias.*
-import test.EnumAlias
-
-
-fun bar() {
-    Entry
-    EnumAlias.Entry
-}

compiler/testData/diagnostics/tests/typealias/starImportOnTypeAlias.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: foo.kt
 
 package test

compiler/testData/diagnostics/tests/typealias/starImportOnTypeAlias.reversed.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: foo.kt
 
 package test
@@ -17,7 +18,7 @@ enum class EnumSample {
 // FILE: bar.kt
 
 import test.ClassAlias.*
-import test.ObjectAlias.*
+import test.<!CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON!>ObjectAlias<!>.*
 import test.EnumAlias.*
 import test.EnumAlias