[FIR] Ignore inaccessible members in FirImplementationMismatchChecker

^KT-61076 Fixed

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

@@ -1137,6 +1137,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
             runTest("compiler/testData/diagnostics/tests/suppressInWhen.kt");
         }
 
+        @Test
+        @TestMetadata("suspendFunAndPrivateJava.kt")
+        public void testSuspendFunAndPrivateJava() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt");
+        }
+
         @Test
         @TestMetadata("SyntaxErrorInTestHighlighting.kt")
         public void testSyntaxErrorInTestHighlighting() throws Exception {

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

@@ -1137,6 +1137,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
             runTest("compiler/testData/diagnostics/tests/suppressInWhen.kt");
         }
 
+        @Test
+        @TestMetadata("suspendFunAndPrivateJava.kt")
+        public void testSuspendFunAndPrivateJava() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt");
+        }
+
         @Test
         @TestMetadata("SyntaxErrorInTestHighlighting.kt")
         public void testSyntaxErrorInTestHighlighting() throws Exception {

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

@@ -1137,6 +1137,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
             runTest("compiler/testData/diagnostics/tests/suppressInWhen.kt");
         }
 
+        @Test
+        @TestMetadata("suspendFunAndPrivateJava.kt")
+        public void testSuspendFunAndPrivateJava() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt");
+        }
+
         @Test
         @TestMetadata("SyntaxErrorInTestHighlighting.kt")
         public void testSyntaxErrorInTestHighlighting() throws Exception {

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

@@ -1137,6 +1137,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
             runTest("compiler/testData/diagnostics/tests/suppressInWhen.kt");
         }
 
+        @Test
+        @TestMetadata("suspendFunAndPrivateJava.kt")
+        public void testSuspendFunAndPrivateJava() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt");
+        }
+
         @Test
         @TestMetadata("SyntaxErrorInTestHighlighting.kt")
         public void testSyntaxErrorInTestHighlighting() throws Exception {

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

@@ -14,6 +14,7 @@ import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.impl.deduplicating
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
 import org.jetbrains.kotlin.diagnostics.reportOn
+import org.jetbrains.kotlin.fir.analysis.checkers.isVisibleInClass
 import org.jetbrains.kotlin.fir.containingClassLookupTag
 import org.jetbrains.kotlin.fir.declarations.FirClass
 import org.jetbrains.kotlin.fir.declarations.FirRegularClass
@@ -188,6 +189,21 @@ object FirImplementationMismatchChecker : FirClassChecker() {
         reporter.reportOn(containingClass.source, FirErrors.VAR_OVERRIDDEN_BY_VAL_BY_DELEGATION, symbol, overriddenVar, context)
     }
 
+    private fun FirTypeScope.collectFunctionsNamed(name: Name, containingClass: FirClass): List<FirNamedFunctionSymbol> {
+        val allFunctions = mutableListOf<FirNamedFunctionSymbol>()
+
+        processFunctionsByName(name) { sym ->
+            when (sym) {
+                is FirIntersectionOverrideFunctionSymbol -> sym.intersections.mapNotNullTo(allFunctions) { it as? FirNamedFunctionSymbol }
+                else -> allFunctions.add(sym)
+            }
+        }
+
+        return allFunctions.filter {
+            it.isVisibleInClass(containingClass.symbol)
+        }
+    }
+
     private fun checkConflictingMembers(
         containingClass: FirClass,
         context: CheckerContext,
@@ -195,13 +211,7 @@ object FirImplementationMismatchChecker : FirClassChecker() {
         scope: FirTypeScope,
         name: Name
     ) {
-        val allFunctions = mutableListOf<FirNamedFunctionSymbol>()
+        val allFunctions = scope.collectFunctionsNamed(name, containingClass)
-        scope.processFunctionsByName(name) { sym ->
-            when (sym) {
-                is FirIntersectionOverrideFunctionSymbol -> sym.intersections.mapNotNullTo(allFunctions) { it as? FirNamedFunctionSymbol }
-                else -> allFunctions.add(sym)
-            }
-        }
 
         val sameArgumentGroups = allFunctions.groupBy { function ->
             buildList {

compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt

@@ -0,0 +1,13 @@
+// FIR_IDENTICAL
+// ISSUE: KT-61076
+// FILE: InspectionApplicationBase.java
+
+public class InspectionApplicationBase {
+    private String loadInspectionProfile() { return ""; }
+}
+
+// FILE: Main.kt
+
+class QodanaInspectionApplication: InspectionApplicationBase() {
+    suspend fun loadInspectionProfile(): String = ""
+}

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

@@ -1137,6 +1137,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
             runTest("compiler/testData/diagnostics/tests/suppressInWhen.kt");
         }
 
+        @Test
+        @TestMetadata("suspendFunAndPrivateJava.kt")
+        public void testSuspendFunAndPrivateJava() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/suspendFunAndPrivateJava.kt");
+        }
+
         @Test
         @TestMetadata("SyntaxErrorInTestHighlighting.kt")
         public void testSyntaxErrorInTestHighlighting() throws Exception {