[INFO] fetching crate arg_input 2.0.1...
[INFO] testing arg_input-2.0.1 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate arg_input 2.0.1 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate arg_input 2.0.1 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arg_input 2.0.1
[INFO] finished tweaking crates.io crate arg_input 2.0.1
[INFO] tweaked toml for crates.io crate arg_input 2.0.1 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce6ae1d4e8362776171c514d0e9b8ed90a5e75cf1de59a5a4db7d14bc0eee7db
[INFO] running `Command { std: "docker" "start" "-a" "ce6ae1d4e8362776171c514d0e9b8ed90a5e75cf1de59a5a4db7d14bc0eee7db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce6ae1d4e8362776171c514d0e9b8ed90a5e75cf1de59a5a4db7d14bc0eee7db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6ae1d4e8362776171c514d0e9b8ed90a5e75cf1de59a5a4db7d14bc0eee7db", kill_on_drop: false }`
[INFO] [stdout] ce6ae1d4e8362776171c514d0e9b8ed90a5e75cf1de59a5a4db7d14bc0eee7db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 042dbfd9e72bcdfbcf7c1935f9ade91237e5244ea7e9662e592a3bc76afb531b
[INFO] running `Command { std: "docker" "start" "-a" "042dbfd9e72bcdfbcf7c1935f9ade91237e5244ea7e9662e592a3bc76afb531b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling arg_input v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:127:42
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout]     |                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 127 - pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout] 127 + pub type Lines = io::Lines<BufReader<Box<dyn Read>>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:148:29
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 - pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout] 148 + pub fn argf() -> Result<Box<dyn Read>, InputError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:177:48
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout]     |                                                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 177 - pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout] 177 + pub fn input<I, J, S>(inputs: I) -> Result<Box<dyn Read>, InputError> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:194:28
[INFO] [stdout]     |
[INFO] [stdout] 194 |   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 194 -   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout] 194 +   I: IntoIterator<Item=Box<dyn Read>>
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:193:40
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout]     |                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 193 - fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout] 193 + fn chain_all_reads<I>(reads: I) -> Box<dyn Read> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:46
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout]     |                                              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 - fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout] 201 + fn from_arg<'a>(arg: &'a Path) -> Result<Box<dyn Read>, FailReadFileError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 42 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:66:30
[INFO] [stdout]    |
[INFO] [stdout] 66 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 66 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `Command { std: "docker" "inspect" "042dbfd9e72bcdfbcf7c1935f9ade91237e5244ea7e9662e592a3bc76afb531b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "042dbfd9e72bcdfbcf7c1935f9ade91237e5244ea7e9662e592a3bc76afb531b", kill_on_drop: false }`
[INFO] [stdout] 042dbfd9e72bcdfbcf7c1935f9ade91237e5244ea7e9662e592a3bc76afb531b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18d973c758b3e0fd25ed3ca7ee3eb0b2d8f842c4c99651f6d8bd5839fcb15073
[INFO] running `Command { std: "docker" "start" "-a" "18d973c758b3e0fd25ed3ca7ee3eb0b2d8f842c4c99651f6d8bd5839fcb15073", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:127:42
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout]     |                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 127 - pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout] 127 + pub type Lines = io::Lines<BufReader<Box<dyn Read>>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:148:29
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 - pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout] 148 + pub fn argf() -> Result<Box<dyn Read>, InputError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:177:48
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout]     |                                                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 177 - pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout] 177 + pub fn input<I, J, S>(inputs: I) -> Result<Box<dyn Read>, InputError> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:194:28
[INFO] [stdout]     |
[INFO] [stdout] 194 |   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 194 -   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout] 194 +   I: IntoIterator<Item=Box<dyn Read>>
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:193:40
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout]     |                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 193 - fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout] 193 + fn chain_all_reads<I>(reads: I) -> Box<dyn Read> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:46
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout]     |                                              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 - fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout] 201 + fn from_arg<'a>(arg: &'a Path) -> Result<Box<dyn Read>, FailReadFileError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 42 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:66:30
[INFO] [stdout]    |
[INFO] [stdout] 66 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 66 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling arg_input v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:127:42
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout]     |                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 127 - pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stdout] 127 + pub type Lines = io::Lines<BufReader<Box<dyn Read>>>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:148:29
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 148 - pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stdout] 148 + pub fn argf() -> Result<Box<dyn Read>, InputError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:177:48
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout]     |                                                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 177 - pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stdout] 177 + pub fn input<I, J, S>(inputs: I) -> Result<Box<dyn Read>, InputError> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:194:28
[INFO] [stdout]     |
[INFO] [stdout] 194 |   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 194 -   I: IntoIterator<Item=Box<Read>>
[INFO] [stdout] 194 +   I: IntoIterator<Item=Box<dyn Read>>
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:193:40
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout]     |                                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 193 - fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stdout] 193 + fn chain_all_reads<I>(reads: I) -> Box<dyn Read> where
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:46
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout]     |                                              ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 201 - fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stdout] 201 + fn from_arg<'a>(arg: &'a Path) -> Result<Box<dyn Read>, FailReadFileError> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 42 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:66:30
[INFO] [stdout]    |
[INFO] [stdout] 66 |   fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 -   fn cause(&self) -> Option<&Error> {
[INFO] [stdout] 66 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "18d973c758b3e0fd25ed3ca7ee3eb0b2d8f842c4c99651f6d8bd5839fcb15073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18d973c758b3e0fd25ed3ca7ee3eb0b2d8f842c4c99651f6d8bd5839fcb15073", kill_on_drop: false }`
[INFO] [stdout] 18d973c758b3e0fd25ed3ca7ee3eb0b2d8f842c4c99651f6d8bd5839fcb15073
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b23e993e589086b04ae0d34384ed72bda63e32fb137f79a9c15708a1c812d564
[INFO] running `Command { std: "docker" "start" "-a" "b23e993e589086b04ae0d34384ed72bda63e32fb137f79a9c15708a1c812d564", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:127:42
[INFO] [stderr]     |
[INFO] [stderr] 127 | pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stderr]     |                                          ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 127 - pub type Lines = io::Lines<BufReader<Box<Read>>>;
[INFO] [stderr] 127 + pub type Lines = io::Lines<BufReader<Box<dyn Read>>>;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:148:29
[INFO] [stderr]     |
[INFO] [stderr] 148 | pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stderr]     |                             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 148 - pub fn argf() -> Result<Box<Read>, InputError> {
[INFO] [stderr] 148 + pub fn argf() -> Result<Box<dyn Read>, InputError> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:177:48
[INFO] [stderr]     |
[INFO] [stderr] 177 | pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stderr]     |                                                ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 177 - pub fn input<I, J, S>(inputs: I) -> Result<Box<Read>, InputError> where
[INFO] [stderr] 177 + pub fn input<I, J, S>(inputs: I) -> Result<Box<dyn Read>, InputError> where
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:194:28
[INFO] [stderr]     |
[INFO] [stderr] 194 |   I: IntoIterator<Item=Box<Read>>
[INFO] [stderr]     |                            ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 194 -   I: IntoIterator<Item=Box<Read>>
[INFO] [stderr] 194 +   I: IntoIterator<Item=Box<dyn Read>>
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:193:40
[INFO] [stderr]     |
[INFO] [stderr] 193 | fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stderr]     |                                        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 193 - fn chain_all_reads<I>(reads: I) -> Box<Read> where
[INFO] [stderr] 193 + fn chain_all_reads<I>(reads: I) -> Box<dyn Read> where
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:201:46
[INFO] [stderr]     |
[INFO] [stderr] 201 | fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stderr]     |                                              ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 201 - fn from_arg<'a>(arg: &'a Path) -> Result<Box<Read>, FailReadFileError> {
[INFO] [stderr] 201 + fn from_arg<'a>(arg: &'a Path) -> Result<Box<dyn Read>, FailReadFileError> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:42:30
[INFO] [stderr]    |
[INFO] [stderr] 42 |   fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 42 -   fn cause(&self) -> Option<&Error> {
[INFO] [stderr] 42 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:66:30
[INFO] [stderr]    |
[INFO] [stderr] 66 |   fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 66 -   fn cause(&self) -> Option<&Error> {
[INFO] [stderr] 66 +   fn cause(&self) -> Option<&dyn Error> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `arg_input` (lib) generated 8 warnings
[INFO] [stderr] warning: `arg_input` (lib test) generated 8 warnings (8 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/arg_input-f59dd2e7b39f0986)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/input_lines_test.rs (/opt/rustwide/target/debug/deps/input_lines_test-e349acb9735bcdbe)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_input_lines_nonexistent ... ok
[INFO] [stdout] test test_input ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/input_test.rs (/opt/rustwide/target/debug/deps/input_test-127dc7511d1c1b2e)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/inputs.rs (/opt/rustwide/target/debug/deps/inputs-abeb54919c53c19d)
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_input ... ok
[INFO] [stdout] test test_input_nonexistent ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests arg_input
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b23e993e589086b04ae0d34384ed72bda63e32fb137f79a9c15708a1c812d564", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b23e993e589086b04ae0d34384ed72bda63e32fb137f79a9c15708a1c812d564", kill_on_drop: false }`
[INFO] [stdout] b23e993e589086b04ae0d34384ed72bda63e32fb137f79a9c15708a1c812d564