blob: ab42b2eff99f858bffac19b006b2e23c015fa4ee (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// NOTE Instantiating an empty enum is UB. This test may break in the future.
// LLDB can't handle zero-sized values
// ignore-lldb
// Require LLVM with DW_TAG_variant_part and a gdb that can read it.
// gdb 8.2.0 crashes on this test case, see
// https://sourceware.org/bugzilla/show_bug.cgi?id=23626
// This will be fixed in the next release, which will be >= 8.2.1.
// min-system-llvm-version: 7.0
// min-gdb-version: 8.2.1
// compile-flags:-g
// gdb-command:run
// gdb-command:print first
// gdbr-check:$1 = nil_enum::ANilEnum {<No data fields>}
// gdb-command:print second
// gdbr-check:$2 = nil_enum::AnotherNilEnum {<No data fields>}
#![allow(unused_variables)]
#![feature(omit_gdb_pretty_printer_section)]
#![feature(maybe_uninit)]
#![omit_gdb_pretty_printer_section]
use std::mem::MaybeUninit;
enum ANilEnum {}
enum AnotherNilEnum {}
// This test relies on gdbg printing the string "{<No data fields>}" for empty
// structs (which may change some time)
// The error from gdbr is expected since nil enums are not supposed to exist.
fn main() {
unsafe {
let first: ANilEnum = MaybeUninit::uninitialized().into_inner();
let second: AnotherNilEnum = MaybeUninit::uninitialized().into_inner();
zzz(); // #break
}
}
fn zzz() {()}
|
