[K1] Correctly handle case when expect annotation is unresolved

Before change NPE was thrown.

Review: KT-MR-12250

^KT-62026

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

@@ -938,6 +938,12 @@ public class FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated extends Abst
             runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/typealiasToKtLibrary.kt");
         }
 
+        @Test
+        @TestMetadata("unresolvedReference.kt")
+        public void testUnresolvedReference() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/unresolvedReference.kt");
+        }
+
         @Test
         @TestMetadata("valueParameters.kt")
         public void testValueParameters() throws Exception {

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

@@ -938,6 +938,12 @@ public class FirOldFrontendMPPDiagnosticsWithPsiTestGenerated extends AbstractFi
             runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/typealiasToKtLibrary.kt");
         }
 
+        @Test
+        @TestMetadata("unresolvedReference.kt")
+        public void testUnresolvedReference() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/unresolvedReference.kt");
+        }
+
         @Test
         @TestMetadata("valueParameters.kt")
         public void testValueParameters() throws Exception {

compiler/resolution/src/org/jetbrains/kotlin/resolve/multiplatform/ClassicExpectActualMatchingContext.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.resolve.scopes.getDescriptorsFiltered
 import org.jetbrains.kotlin.types.*
 import org.jetbrains.kotlin.types.checker.*
+import org.jetbrains.kotlin.types.error.ErrorClassDescriptor
 import org.jetbrains.kotlin.types.model.KotlinTypeMarker
 import org.jetbrains.kotlin.types.model.TypeConstructorMarker
 import org.jetbrains.kotlin.types.model.TypeSubstitutorMarker
@@ -389,6 +390,9 @@ class ClassicExpectActualMatchingContext(
 
         private fun getAnnotationClassDescriptor(): ClassDescriptor? {
             val classDescriptor = annotationDescriptor.annotationClass ?: return null
+            if (classDescriptor is ErrorClassDescriptor) {
+                return null
+            }
             if (!classDescriptor.isExpect) {
                 return classDescriptor
             }

compiler/testData/diagnostics/tests/multiplatform/annotationMatching/unresolvedReference.fir.kt

@@ -0,0 +1,9 @@
+// DIAGNOSTICS: -UNRESOLVED_REFERENCE
+// MODULE: m1-common
+// FILE: common.kt
+@NonExistingClass
+expect fun foo()
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+actual fun <!ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT!>foo<!>() {}

compiler/testData/diagnostics/tests/multiplatform/annotationMatching/unresolvedReference.kt

@@ -0,0 +1,9 @@
+// DIAGNOSTICS: -UNRESOLVED_REFERENCE
+// MODULE: m1-common
+// FILE: common.kt
+@NonExistingClass
+expect fun foo()
+
+// MODULE: m1-jvm()()(m1-common)
+// FILE: jvm.kt
+actual fun foo() {}

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

@@ -23939,6 +23939,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/typealiasToKtLibrary.kt");
                 }
 
+                @Test
+                @TestMetadata("unresolvedReference.kt")
+                public void testUnresolvedReference() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/multiplatform/annotationMatching/unresolvedReference.kt");
+                }
+
                 @Test
                 @TestMetadata("valueParameters.kt")
                 public void testValueParameters() throws Exception {