src/test/ui/rust-2021/future-prelude-collision.stderr

   1 warning: trait method `try_into` will become ambiguous in Rust 2021
   2   --> $DIR/future-prelude-collision.rs:56:18
   3    |
   4 LL |     let _: u32 = 3u8.try_into().unwrap();
   5    |                  ^^^^^^^^^^^^^^ help: disambiguate the associated function: `TryIntoU32::try_into(3u8)`
   6    |
   7    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
   8    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
   9 note: the lint level is defined here
  10   --> $DIR/future-prelude-collision.rs:4:9
  11    |
  12 LL | #![warn(rust_2021_prelude_collisions)]
  13    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  14
  15 warning: trait-associated function `try_from` will become ambiguous in Rust 2021
  16   --> $DIR/future-prelude-collision.rs:61:13
  17    |
  18 LL |     let _ = u32::try_from(3u8).unwrap();
  19    |             ^^^^^^^^^^^^^ help: disambiguate the associated function: `<u32 as TryFromU8>::try_from`
  20    |
  21    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  22    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  23
  24 warning: trait-associated function `from_iter` will become ambiguous in Rust 2021
  25   --> $DIR/future-prelude-collision.rs:66:13
  26    |
  27 LL |     let _ = <Vec<u8>>::from_iter(vec![1u8, 2, 3, 4, 5, 6].into_iter());
  28    |             ^^^^^^^^^^^^^^^^^^^^ help: disambiguate the associated function: `<Vec<u8> as FromByteIterator>::from_iter`
  29    |
  30    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  31    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  32
  33 warning: trait-associated function `try_from` will become ambiguous in Rust 2021
  34   --> $DIR/future-prelude-collision.rs:74:18
  35    |
  36 LL |     let _: u32 = <_>::try_from(3u8).unwrap();
  37    |                  ^^^^^^^^^^^^^ help: disambiguate the associated function: `<_ as TryFromU8>::try_from`
  38    |
  39    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  40    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  41
  42 warning: trait method `try_into` will become ambiguous in Rust 2021
  43   --> $DIR/future-prelude-collision.rs:79:18
  44    |
  45 LL |     let _: u32 = (&3u8).try_into().unwrap();
  46    |                  ^^^^^^^^^^^^^^^^^ help: disambiguate the associated function: `TryIntoU32::try_into(*(&3u8))`
  47    |
  48    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  49    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  50
  51 warning: trait method `try_into` will become ambiguous in Rust 2021
  52   --> $DIR/future-prelude-collision.rs:84:18
  53    |
  54 LL |     let _: u32 = 3.0.try_into().unwrap();
  55    |                  ^^^^^^^^^^^^^^ help: disambiguate the associated function: `TryIntoU32::try_into(&3.0)`
  56    |
  57    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  58    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  59
  60 warning: trait method `try_into` will become ambiguous in Rust 2021
  61   --> $DIR/future-prelude-collision.rs:90:18
  62    |
  63 LL |     let _: u32 = mut_ptr.try_into().unwrap();
  64    |                  ^^^^^^^^^^^^^^^^^^ help: disambiguate the associated function: `TryIntoU32::try_into(mut_ptr as *const _)`
  65    |
  66    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  67    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  68
  69 warning: trait-associated function `try_from` will become ambiguous in Rust 2021
  70   --> $DIR/future-prelude-collision.rs:95:13
  71    |
  72 LL |     let _ = U32Alias::try_from(3u8).unwrap();
  73    |             ^^^^^^^^^^^^^^^^^^ help: disambiguate the associated function: `<U32Alias as TryFromU8>::try_from`
  74    |
  75    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
  76    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
  77
  78 warning: 8 warnings emitted
  79