KT-47939 fun interface constructor reference should throw NPE for null

compiler/testData/codegen/box/callableReference/funInterfaceConstructor/funInterfaceConstructorThrowsNpe.kt

@@ -0,0 +1,32 @@
+// !LANGUAGE: +KotlinFunInterfaceConstructorReference
+
+// WITH_RUNTIME
+// TARGET_BACKEND: JVM
+
+// DONT_TARGET_EXACT_BACKEND: JVM
+//  ^ old JVM BE generates bogus code
+
+// FILE: funInterfaceConstructorThrowsNpe.kt
+
+fun interface KSupplier<T> {
+    fun get(): T
+}
+
+val ks: (() -> String) -> KSupplier<String> =
+    ::KSupplier
+
+fun box(): String {
+    try {
+        ks(J.fn)
+        return "ks(null) should throw NPE"
+    } catch (e: NullPointerException) {
+        return "OK"
+    }
+}
+
+// FILE: J.java
+import kotlin.jvm.functions.Function0;
+
+public class J {
+    public static Function0<String> fn = null;
+}