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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// run-rustfix
#![deny(rust_2021_incompatible_closure_captures)]
//~^ NOTE: the lint level is defined here
use std::thread;
#[derive(Debug)]
struct Foo(String);
impl Drop for Foo {
fn drop(&mut self) {
println!("{:?} dropped", self.0);
}
}
impl Foo {
fn from(s: &str) -> Self {
Self(String::from(s))
}
}
struct S(#[allow(unused_tuple_struct_fields)] Foo);
#[derive(Clone)]
struct T(#[allow(unused_tuple_struct_fields)] i32);
struct U(S, T);
impl Clone for U {
fn clone(&self) -> Self {
U(S(Foo::from("Hello World")), T(0))
}
}
fn test_multi_issues() {
let f1 = U(S(Foo::from("foo")), T(0));
let f2 = U(S(Foo::from("bar")), T(0));
let c = || {
let _ = (&f1, &f2);
//~^ ERROR: changes to closure capture in Rust 2021
//~| NOTE: in Rust 2018, this closure implements `Clone` as `f1` implements `Clone`
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `f1`, `f2` to be fully captured
let _f_1 = f1.0;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.0`
let _f_2 = f2.1;
//~^ NOTE: in Rust 2018, this closure captures all of `f2`, but in Rust 2021, it will only capture `f2.1`
};
let c_clone = c.clone();
c_clone();
}
//~^ NOTE: in Rust 2018, `f2` is dropped here, but in Rust 2021, only `f2.1` will be dropped here as part of the closure
fn test_capturing_all_disjoint_fields_individually() {
let f1 = U(S(Foo::from("foo")), T(0));
let c = || {
let _ = &f1;
//~^ ERROR: changes to closure capture in Rust 2021 will affect which traits the closure implements [rust_2021_incompatible_closure_captures]
//~| NOTE: in Rust 2018, this closure implements `Clone` as `f1` implements `Clone`
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `f1` to be fully captured
let _f_1 = f1.0;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.0`
let _f_2 = f1.1;
};
let c_clone = c.clone();
c_clone();
}
struct U1(S, T, S);
impl Clone for U1 {
fn clone(&self) -> Self {
U1(S(Foo::from("foo")), T(0), S(Foo::from("bar")))
}
}
fn test_capturing_several_disjoint_fields_individually_1() {
let f1 = U1(S(Foo::from("foo")), T(0), S(Foo::from("bar")));
let c = || {
let _ = &f1;
//~^ ERROR: changes to closure capture in Rust 2021 will affect which traits the closure implements [rust_2021_incompatible_closure_captures]
//~| NOTE: in Rust 2018, this closure implements `Clone` as `f1` implements `Clone`
//~| NOTE: in Rust 2018, this closure implements `Clone` as `f1` implements `Clone`
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `f1` to be fully captured
let _f_0 = f1.0;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.0`
let _f_2 = f1.2;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.2`
};
let c_clone = c.clone();
c_clone();
}
fn test_capturing_several_disjoint_fields_individually_2() {
let f1 = U1(S(Foo::from("foo")), T(0), S(Foo::from("bar")));
let c = || {
let _ = &f1;
//~^ ERROR: changes to closure capture in Rust 2021 will affect drop order and which traits the closure implements
//~| NOTE: in Rust 2018, this closure implements `Clone` as `f1` implements `Clone`
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `f1` to be fully captured
let _f_0 = f1.0;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.0`
let _f_1 = f1.1;
//~^ NOTE: in Rust 2018, this closure captures all of `f1`, but in Rust 2021, it will only capture `f1.1`
};
let c_clone = c.clone();
c_clone();
}
//~^ NOTE: in Rust 2018, `f1` is dropped here, but in Rust 2021, only `f1.1` will be dropped here as part of the closure
//~| NOTE: in Rust 2018, `f1` is dropped here, but in Rust 2021, only `f1.0` will be dropped here as part of the closure
struct SendPointer(*mut i32);
unsafe impl Send for SendPointer {}
struct CustomInt(*mut i32);
struct SyncPointer(CustomInt);
unsafe impl Sync for SyncPointer {}
unsafe impl Send for CustomInt {}
fn test_multi_traits_issues() {
let mut f1 = 10;
let f1 = CustomInt(&mut f1 as *mut i32);
let fptr1 = SyncPointer(f1);
let mut f2 = 10;
let fptr2 = SendPointer(&mut f2 as *mut i32);
thread::spawn(move || { let _ = (&fptr1, &fptr2); unsafe {
//~^ ERROR: changes to closure capture in Rust 2021
//~| NOTE: in Rust 2018, this closure implements `Sync` as `fptr1` implements `Sync`
//~| NOTE: in Rust 2018, this closure implements `Send` as `fptr1` implements `Send`
//~| NOTE: in Rust 2018, this closure implements `Send` as `fptr2` implements `Send`
//~| NOTE: for more information, see
//~| HELP: add a dummy let to cause `fptr1`, `fptr2` to be fully captured
*fptr1.0.0 = 20;
//~^ NOTE: in Rust 2018, this closure captures all of `fptr1`, but in Rust 2021, it will only capture `fptr1.0.0`
*fptr2.0 = 20;
//~^ NOTE: in Rust 2018, this closure captures all of `fptr2`, but in Rust 2021, it will only capture `fptr2.0`
} });
}
fn main() {
test_multi_issues();
test_capturing_all_disjoint_fields_individually();
test_capturing_several_disjoint_fields_individually_1();
test_capturing_several_disjoint_fields_individually_2();
test_multi_traits_issues();
}
|
