Rework frozen lazy to explicitly prevent cyclic garbage. (#1894)

backend.native/tests/build.gradle

@@ -724,6 +724,12 @@ task lazy0(type: RunKonanTest) {
     source = "runtime/workers/lazy0.kt"
 }
 
+task lazy1(type: RunKonanTest) {
+    disabled = (project.testTarget == 'wasm32') // Need exceptions.
+    goldValue = "OK\n"
+    source = "runtime/workers/lazy1.kt"
+}
+
 task enumIdentity(type: RunKonanTest) {
     disabled = (project.testTarget == 'wasm32') // Workers need pthreads.
     goldValue = "true\n"

backend.native/tests/runtime/workers/lazy1.kt

@@ -0,0 +1,17 @@
+package runtime.workers.lazy1
+
+import kotlin.test.*
+
+import kotlin.native.worker.*
+
+class Leak {
+    val leak by lazy { this }
+}
+
+@Test fun runTest() {
+    assertFailsWith<InvalidMutabilityException> {
+        for (i in 1..100)
+            Leak().freeze().leak
+    }
+    println("OK")
+}