FE: add test for KT-54305

compiler/testData/diagnostics/tests/syntheticSet.fir.kt

@@ -0,0 +1,57 @@
+// FILE: Container.java
+
+public class Container<E> {
+
+    Wrapper<E> w = null;
+
+    public Wrapper<E> getWrapper() {
+        return null;
+    }
+
+    public void setWrapper(Wrapper<E> wrapper) {}
+}
+
+// FILE: Wrapper.java
+
+public class Wrapper<W> {
+}
+
+// FILE: test.kt
+
+fun foo(container: Container<*>, wrapper: Wrapper<String>) {
+    container.w = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+    container.setWrapper(<!ARGUMENT_TYPE_MISMATCH!>wrapper<!>)
+}
+
+fun bar(container: Container<String>, wrapper: Wrapper<String>) {
+    container.wrapper = wrapper
+    container.setWrapper(wrapper)
+}
+
+fun baz(container: Container<Any>, wrapper: Wrapper<String>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+}
+
+fun gau(container: Container<String>, wrapper: Wrapper<Any>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+}
+
+fun dif(container: Container<String>, wrapper: Wrapper<Int>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+}
+
+fun out(container: Container<out Any>, wrapper: Wrapper<String>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+    container.setWrapper(<!ARGUMENT_TYPE_MISMATCH!>wrapper<!>)
+}
+
+fun inn(container: Container<in String>, wrapper: Wrapper<Any>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+    container.setWrapper(<!ARGUMENT_TYPE_MISMATCH!>wrapper<!>)
+}
+
+fun <T> generic(container: Container<out T>, wrapper: Wrapper<out T>) {
+    container.wrapper = <!ASSIGNMENT_TYPE_MISMATCH!>wrapper<!>
+    container.setWrapper(<!ARGUMENT_TYPE_MISMATCH!>wrapper<!>)
+}