1 error[E0283]: type annotations needed
2 --> $DIR/issue-77982.rs:8:10
4 LL | opts.get(opt.as_ref());
5 | ^^^ ------------ type must be known at this point
7 | cannot infer type of the type parameter `Q` declared on the associated function `get`
9 = note: multiple `impl`s satisfying `String: Borrow<_>` found in the following crates: `alloc`, `core`:
10 - impl Borrow<str> for String;
11 - impl<T> Borrow<T> for T
13 note: required by a bound in `HashMap::<K, V, S>::get`
14 --> $SRC_DIR/std/src/collections/hash/map.rs:LL:COL
17 | ^^^^^^^^^ required by this bound in `HashMap::<K, V, S>::get`
18 help: consider specifying the generic argument
20 LL | opts.get::<Q>(opt.as_ref());
23 error[E0283]: type annotations needed
24 --> $DIR/issue-77982.rs:8:10
26 LL | opts.get(opt.as_ref());
27 | ^^^ ------ type must be known at this point
29 | cannot infer type of the type parameter `Q` declared on the associated function `get`
31 = note: multiple `impl`s satisfying `String: AsRef<_>` found in the following crates: `alloc`, `std`:
32 - impl AsRef<OsStr> for String;
33 - impl AsRef<Path> for String;
34 - impl AsRef<[u8]> for String;
35 - impl AsRef<str> for String;
36 help: consider specifying the generic argument
38 LL | opts.get::<Q>(opt.as_ref());
41 error[E0283]: type annotations needed
42 --> $DIR/issue-77982.rs:13:59
44 LL | let ips: Vec<_> = (0..100_000).map(|_| u32::from(0u32.into())).collect();
47 | required by a bound introduced by this call
49 = note: multiple `impl`s satisfying `u32: From<_>` found in the following crates: `core`, `std`:
50 - impl From<Ipv4Addr> for u32;
51 - impl From<NonZeroU32> for u32;
52 - impl From<bool> for u32;
53 - impl From<char> for u32;
55 help: try using a fully qualified path to specify the expected types
57 LL | let ips: Vec<_> = (0..100_000).map(|_| u32::from(<u32 as Into<T>>::into(0u32))).collect();
58 | +++++++++++++++++++++++ ~
60 error[E0283]: type annotations needed for `Box<T>`
61 --> $DIR/issue-77982.rs:36:9
63 LL | let _ = ().foo();
64 | ^ --- type must be known at this point
66 note: multiple `impl`s satisfying `(): Foo<'_, _>` found
67 --> $DIR/issue-77982.rs:29:1
69 LL | impl Foo<'static, u32> for () {}
70 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
71 LL | impl<'a> Foo<'a, i16> for () {}
72 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
73 help: consider giving this pattern a type, where the type for type parameter `T` is specified
75 LL | let _: Box<T> = ().foo();
78 error[E0283]: type annotations needed for `Box<T>`
79 --> $DIR/issue-77982.rs:40:9
81 LL | let _ = (&()).bar();
82 | ^ --- type must be known at this point
84 note: multiple `impl`s satisfying `&(): Bar<'_, _>` found
85 --> $DIR/issue-77982.rs:32:1
87 LL | impl<'a> Bar<'static, u32> for &'a () {}
88 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
89 LL | impl<'a> Bar<'a, i16> for &'a () {}
90 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
91 help: consider giving this pattern a type, where the type for type parameter `T` is specified
93 LL | let _: Box<T> = (&()).bar();
96 error: aborting due to 5 previous errors
98 For more information about this error, try `rustc --explain E0283`.