JVM_IR never generate setter synthetic accessor for 'val' field

KT-49316

compiler/testData/codegen/box/syntheticAccessors/kt49316.kt

@@ -0,0 +1,27 @@
+// IGNORE_BACKEND: JS
+//  java.lang.AssertionError
+//    at org.jetbrains.kotlin.js.translate.context.TranslationContext.getDispatchReceiver(TranslationContext.java:590)
+//    at org.jetbrains.kotlin.js.translate.utils.TranslationUtils.backingFieldReference(TranslationUtils.java:237)
+//    at org.jetbrains.kotlin.js.translate.utils.TranslationUtils.assignmentToBackingField(TranslationUtils.java:250)
+//    at org.jetbrains.kotlin.js.translate.reference.BackingFieldAccessTranslator.translateAsSet(BackingFieldAccessTranslator.java:60)
+//    ...
+
+// FILE: kt49316.kt
+import a.*
+
+// This test should become irrelevant after KT-35565 is fixed.
+
+fun test(foo: Foo): String {
+    return foo.s
+
+    // VAL_REASSIGNMENT not reported in unreachable code.
+    // Make sure there's no BE internal error here.
+    foo.s = "oops"
+}
+
+fun box() = test(Foo("OK"))
+
+// FILE: Foo.kt
+package a
+
+class Foo(val s: String)

compiler/testData/codegen/box/syntheticAccessors/kt49316a.kt

@@ -0,0 +1,17 @@
+// TARGET_BACKEND: JVM
+
+// This test should become irrelevant after KT-35565 is fixed.
+
+fun test(foo: Foo): String {
+    return foo.s
+
+    // VAL_REASSIGNMENT not reported in unreachable code.
+    // Make sure there's no BE internal error here.
+    foo.s = "oops"
+}
+
+// CHECK_BYTECODE_LISTING
+// - there should be no synthetic accessor generated in 'Foo'
+class Foo(val s: String)
+
+fun box() = test(Foo("OK"))

compiler/testData/codegen/box/syntheticAccessors/kt49316a.txt

@@ -0,0 +1,14 @@
+@kotlin.Metadata
+public final class Foo {
+    // source: 'kt49316a.kt'
+    private final @org.jetbrains.annotations.NotNull field s: java.lang.String
+    public method <init>(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+    public final @org.jetbrains.annotations.NotNull method getS(): java.lang.String
+}
+
+@kotlin.Metadata
+public final class Kt49316aKt {
+    // source: 'kt49316a.kt'
+    public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
+    public final static @org.jetbrains.annotations.NotNull method test(@org.jetbrains.annotations.NotNull p0: Foo): java.lang.String
+}