FIR: correctly process accessor symbols in derived classes

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaClassEnhancementScope.kt

@@ -111,7 +111,7 @@ class JavaClassEnhancementScope(
                 ) as FirAccessorSymbol
             }
             else -> {
-                if (original is FirPropertySymbol) return original
+                if (original is FirPropertySymbol || original is FirAccessorSymbol) return original
                 error("Can't make enhancement for $original: `${firElement.render()}`")
             }
         }

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/scopes/JavaClassUseSiteMemberScope.kt

@@ -100,7 +100,7 @@ class JavaClassUseSiteMemberScope(
                 processor(it)
             } else {
                 val overriddenBy = it.getOverridden(overrideCandidates)
-                if (overriddenBy == null && it is FirVariableSymbol<*>) {
+                if (overriddenBy == null) {
                     processor(it)
                 } else {
                     NEXT

compiler/fir/resolve/testData/resolve/stdlib/j+k/SyntheticAfterFiltering.kt

@@ -0,0 +1,18 @@
+// FILE: PsiElement.java
+
+public interface PsiElement {
+    PsiElement[] getChildren();
+}
+
+// FILE: XmlTag.java
+
+public interface XmlTag extends PsiElement {
+    String getLocalName();
+}
+
+// FILE: test.kt
+
+fun foo(tag: XmlTag, name: String): List<XmlTag> {
+    val result = tag.children.filterIsInstance<XmlTag>().filter { it.localName == name }
+    return result
+}

compiler/fir/resolve/testData/resolve/stdlib/j+k/SyntheticAfterFiltering.txt

@@ -0,0 +1,8 @@
+FILE: test.kt
+    public final fun foo(tag: R|XmlTag|, name: R|kotlin/String|): R|kotlin/collections/List<XmlTag>| {
+        lval result: R|kotlin/collections/List<XmlTag>| = R|<local>/tag|.R|/PsiElement.children|.R|kotlin/collections/filterIsInstance|<R|XmlTag|>().R|kotlin/collections/filter|<R|XmlTag|>(<L> = filter@fun <anonymous>(it: R|XmlTag|): R|kotlin/Boolean| <kind=UNKNOWN>  {
+            ==(R|<local>/it|.R|/XmlTag.localName|, R|<local>/name|)
+        }
+        )
+        ^foo R|<local>/result|
+    }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsWithStdlibTestGenerated.java

@@ -529,6 +529,11 @@ public class FirDiagnosticsWithStdlibTestGenerated extends AbstractFirDiagnostic
             runTest("compiler/fir/resolve/testData/resolve/stdlib/j+k/StaticGenericMethod.kt");
         }
 
+        @TestMetadata("SyntheticAfterFiltering.kt")
+        public void testSyntheticAfterFiltering() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/stdlib/j+k/SyntheticAfterFiltering.kt");
+        }
+
         @TestMetadata("SyntheticWithForEach.kt")
         public void testSyntheticWithForEach() throws Exception {
             runTest("compiler/fir/resolve/testData/resolve/stdlib/j+k/SyntheticWithForEach.kt");