[Tests] Make sure desugaring works with context receivers

compiler/testData/codegen/box/extensionFunctions/contextReceivers/arrayAccessOperators.kt

@@ -0,0 +1,24 @@
+// !LANGUAGE: +ContextReceivers
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+
+data class MyContainer(var s: String)
+
+context(Int)
+operator fun MyContainer.get(index: Int): String? {
+    return if (index == 0 && this@Int == 42) s else null
+}
+
+context(Int)
+operator fun MyContainer.set(index: Int, value: String) {
+    if (index != 0  || this@Int != 42) return
+    s = value
+}
+
+fun box(): String {
+    return with(42) {
+        val myContainer = MyContainer("fail")
+        myContainer[0] = "OK"
+        myContainer[0] ?: "fail"
+    }
+}