[INFO] fetching crate tokio-io 0.1.13...
[INFO] checking tokio-io-0.1.13 against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] extracting crate tokio-io 0.1.13 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate tokio-io 0.1.13
[INFO] finished tweaking crates.io crate tokio-io 0.1.13
[INFO] tweaked toml for crates.io crate tokio-io 0.1.13 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tokio-io 0.1.13 on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages to highest compatible versions
[INFO] [stderr]       Adding bytes v0.4.12 (available: v1.12.1)
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.34)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `tokio-io` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e
[INFO] running `Command { std: "docker" "start" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `tokio-io` (manifest) generated 1 warning
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking tokio-io v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this attribute can only be applied at the crate level
[INFO] [stdout]   --> src/_tokio_codec/mod.rs:14:16
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![doc(hidden, html_root_url = "https://docs.rs/tokio-codec/0.1.0")]
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level> for more information
[INFO] [stdout]    = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this attribute can only be applied at the crate level
[INFO] [stdout]   --> src/_tokio_codec/mod.rs:14:16
[INFO] [stdout]    |
[INFO] [stdout] 14 | #![doc(hidden, html_root_url = "https://docs.rs/tokio-codec/0.1.0")]
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level> for more information
[INFO] [stdout]    = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/_tokio_codec/framed_read.rs:209:43
[INFO] [stdout]     |
[INFO] [stdout] 209 |             if 0 == try_ready!(self.inner.read_buf(&mut self.buffer)) {
[INFO] [stdout]     |                                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/framed_read.rs:213:43
[INFO] [stdout]     |
[INFO] [stdout] 213 |             if 0 == try_ready!(self.inner.read_buf(&mut self.buffer)) {
[INFO] [stdout]     |                                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/_tokio_codec/framed_read.rs:209:43
[INFO] [stdout]     |
[INFO] [stdout] 209 |             if 0 == try_ready!(self.inner.read_buf(&mut self.buffer)) {
[INFO] [stdout]     |                                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/length_delimited.rs:570:24
[INFO] [stdout]     |
[INFO] [stdout] 570 |         self.get_mut().read_buf(buf)
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/split.rs:74:11
[INFO] [stdout]    |
[INFO] [stdout] 74 |         l.read_buf(buf)
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 + #![feature(read_buf)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/framed_read.rs:213:43
[INFO] [stdout]     |
[INFO] [stdout] 213 |             if 0 == try_ready!(self.inner.read_buf(&mut self.buffer)) {
[INFO] [stdout]     |                                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/length_delimited.rs:570:24
[INFO] [stdout]     |
[INFO] [stdout] 570 |         self.get_mut().read_buf(buf)
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/split.rs:74:11
[INFO] [stdout]    |
[INFO] [stdout] 74 |         l.read_buf(buf)
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 + #![feature(read_buf)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/split.rs:160:24
[INFO] [stdout]     |
[INFO] [stdout] 160 |             assert!(rx.read_buf(&mut buf).unwrap().is_ready());
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/split.rs:166:25
[INFO] [stdout]     |
[INFO] [stdout] 166 |             assert!(!rx.read_buf(&mut buf).unwrap().is_ready());
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/split.rs:171:24
[INFO] [stdout]     |
[INFO] [stdout] 171 |             assert!(rx.read_buf(&mut buf).unwrap().is_ready());
[INFO] [stdout]     |                        ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: call with fully qualified syntax `AsyncRead::read_buf(...)` to keep using the current method
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `read_buf`
[INFO] [stdout]    --> src/lib.rs:17:1
[INFO] [stdout]     |
[INFO] [stdout]  17 + #![feature(read_buf)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_read.rs:84:34
[INFO] [stdout]    |
[INFO] [stdout] 84 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 84 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 84 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 84 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 84 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_write.rs:50:34
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 50 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 50 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 50 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 50 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_write.rs:67:34
[INFO] [stdout]    |
[INFO] [stdout] 67 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 67 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 67 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 67 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 67 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/io/read_to_end.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 try_nb!(a.read_to_end(buf));
[INFO] [stdout]    |                 --------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/io/read_until.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 try_nb!(a.read_until(byte, buf));
[INFO] [stdout]    |                 -------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lines.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let n = try_nb!(self.io.read_line(&mut self.line));
[INFO] [stdout]    |                 ------------------------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio-io` (lib) due to 6 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_read.rs:84:34
[INFO] [stdout]    |
[INFO] [stdout] 84 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 84 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 84 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 84 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 84 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_write.rs:50:34
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 50 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 50 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 50 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 50 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/async_write.rs:67:34
[INFO] [stdout]    |
[INFO] [stdout] 67 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 67 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 67 +             Err(e) => return Err(e),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 67 -             Err(e) => return Err(e.into()),
[INFO] [stdout] 67 +             Err(e) => return Err(<std::io::Error as Into<_>>::into(e)),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/io/read_to_end.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 try_nb!(a.read_to_end(buf));
[INFO] [stdout]    |                 --------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/io/read_until.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 try_nb!(a.read_until(byte, buf));
[INFO] [stdout]    |                 -------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:48:34
[INFO] [stdout]    |
[INFO] [stdout] 41 | macro_rules! try_nb {
[INFO] [stdout] ...
[INFO] [stdout] 48 |             Err(e) => return Err(e.into()),
[INFO] [stdout]    |                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lines.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let n = try_nb!(self.io.read_line(&mut self.line));
[INFO] [stdout]    |                 ------------------------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::io::Error as Into<std::io::Error>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio-io` (lib test) due to 6 previous errors; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e", kill_on_drop: false }`
[INFO] [stdout] 60317338d06de1c07f97640e57281f159403a98b64298e7973ba55af3c91739e
