| // IGNORE_BACKEND: JS_IR, JS_IR_ES6, WASM_JS, WASM_WASI | |
| // IGNORE_NATIVE: optimizationMode=DEBUG | |
| // IGNORE_NATIVE: optimizationMode=NO | |
| // IGNORE_KLIB_RUNTIME_ERRORS_WITH_CUSTOM_FIRST_STAGE: Native:* | |
| // IGNORE_KLIB_RUNTIME_ERRORS_WITH_CUSTOM_SECOND_STAGE: Native:2.4 | |
| @Suppress("UNCHECKED_CAST") | |
| fun <T> f() = 1L as T | |
| fun box(): String { | |
| val x: Int = f()!! // T = Int?, but the cast succeeds because it's immediately upcasted to Number | |
| return if (x == 1) "OK" else "fail: $x" | |
| } |