Handle a weird case from Analysis API

See #2480 for details.

(cherry picked from commit 4bad3ba)

Author: ting-yuan

kotlin-analysis-api/src/main/kotlin/com/google/devtools/ksp/impl/symbol/kotlin/KSFunctionDeclarationImpl.kt

@@ -139,7 +139,10 @@ class KSFunctionDeclarationImpl private constructor(internal val ktFunctionSymbo
     override val simpleName: KSName by lazy {
         when (ktFunctionSymbol) {
             is KaNamedFunctionSymbol -> KSNameImpl.getCached(ktFunctionSymbol.name.asString())
-            is KaPropertyAccessorSymbol -> KSNameImpl.getCached((ktFunctionSymbol.psi as PsiMethod).name)
+            is KaPropertyAccessorSymbol -> when (val psi = ktFunctionSymbol.psi) {
+                is PsiMethod -> KSNameImpl.getCached(psi.name)
+                else -> KSNameImpl.getCached(ktFunctionSymbol.callableId?.callableName?.asString() ?: "<no name>")
+            }
             is KaConstructorSymbol -> KSNameImpl.getCached("<init>")
             else -> throw IllegalStateException("Unexpected function symbol type ${ktFunctionSymbol.javaClass}")
         }

kotlin-analysis-api/src/main/kotlin/com/google/devtools/ksp/impl/symbol/kotlin/util.kt

@@ -251,6 +251,7 @@ internal inline fun <R> analyze(crossinline action: KaSession.() -> R): R {
     return analyze(ResolverAAImpl.ktModule, action)
 }
 
+// FIXME: https://github.com/google/ksp/issues/2480
 internal fun KaDeclarationContainerSymbol.declarations(): Sequence<KSDeclaration> {
     return analyze {
         this@declarations.let {

test-utils/testData/api/hello.kt

@@ -96,6 +96,18 @@ fun <D> foo(c: C, dd: () -> D) = 1
 
 class CC: C() {}
 
+public interface K1 {
+    fun getProp(): String = "1"
+}
+
+public interface K2 {
+    val prop: String = "2"
+}
+
+// FILE: JI.java
+public interface JI extends K1, K2 {
+}
+
 // FILE: C.java
 import java.util.List;
 import java.util.ArrayList;