1 error[E0433]: failed to resolve: use of undeclared type `TryFrom`
2 --> $DIR/suggest-tryinto-edition-change.rs:11:19
4 LL | let _i: i16 = TryFrom::try_from(0_i32).unwrap();
5 | ^^^^^^^ use of undeclared type `TryFrom`
7 = note: 'std::convert::TryFrom' is included in the prelude starting in Edition 2021
8 = note: 'core::convert::TryFrom' is included in the prelude starting in Edition 2021
9 help: consider importing one of these items
11 LL | use core::convert::TryFrom;
13 LL | use std::convert::TryFrom;
16 error[E0433]: failed to resolve: use of undeclared type `TryInto`
17 --> $DIR/suggest-tryinto-edition-change.rs:17:19
19 LL | let _i: i16 = TryInto::try_into(0_i32).unwrap();
20 | ^^^^^^^ use of undeclared type `TryInto`
22 = note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
23 = note: 'core::convert::TryInto' is included in the prelude starting in Edition 2021
24 help: consider importing one of these items
26 LL | use core::convert::TryInto;
28 LL | use std::convert::TryInto;
31 error[E0433]: failed to resolve: use of undeclared type `FromIterator`
32 --> $DIR/suggest-tryinto-edition-change.rs:23:22
34 LL | let _v: Vec<_> = FromIterator::from_iter(&[1]);
35 | ^^^^^^^^^^^^ use of undeclared type `FromIterator`
37 = note: 'std::iter::FromIterator' is included in the prelude starting in Edition 2021
38 = note: 'core::iter::FromIterator' is included in the prelude starting in Edition 2021
39 help: a trait with a similar name exists
41 LL | let _v: Vec<_> = IntoIterator::from_iter(&[1]);
43 help: consider importing one of these items
45 LL | use core::iter::FromIterator;
47 LL | use std::iter::FromIterator;
50 error[E0599]: no method named `try_into` found for type `i32` in the current scope
51 --> $DIR/suggest-tryinto-edition-change.rs:6:25
53 LL | let _i: i16 = 0_i32.try_into().unwrap();
54 | ^^^^^^^^ method not found in `i32`
55 --> $SRC_DIR/core/src/convert/mod.rs:LL:COL
57 = note: the method is available for `i32` here
59 = help: items from traits can only be used if the trait is in scope
60 = note: 'std::convert::TryInto' is included in the prelude starting in Edition 2021
61 help: the following trait is implemented but not in scope; perhaps add a `use` for it:
63 LL | use std::convert::TryInto;
66 error: aborting due to 4 previous errors
68 Some errors have detailed explanations: E0433, E0599.
69 For more information about an error, try `rustc --explain E0433`.