[INFO] cloning repository https://github.com/rtomchinsky/brainfuck-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rtomchinsky/brainfuck-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtomchinsky%2Fbrainfuck-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtomchinsky%2Fbrainfuck-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c82a51a5ad11f626a1f175e4fe3c081cc4377cd0
[INFO] testing rtomchinsky/brainfuck-rs against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtomchinsky%2Fbrainfuck-rs" "/workspace/builds/worker-89/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-89/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rtomchinsky/brainfuck-rs on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rtomchinsky/brainfuck-rs
[INFO] finished tweaking git repo https://github.com/rtomchinsky/brainfuck-rs
[INFO] tweaked toml for git repo https://github.com/rtomchinsky/brainfuck-rs written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] crate git repo https://github.com/rtomchinsky/brainfuck-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba2a7b9144da7bd363e219a81d3420f5d1a7872b912659470a67c89b19248c3d
[INFO] running `Command { std: "docker" "start" "-a" "ba2a7b9144da7bd363e219a81d3420f5d1a7872b912659470a67c89b19248c3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba2a7b9144da7bd363e219a81d3420f5d1a7872b912659470a67c89b19248c3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba2a7b9144da7bd363e219a81d3420f5d1a7872b912659470a67c89b19248c3d", kill_on_drop: false }`
[INFO] [stdout] ba2a7b9144da7bd363e219a81d3420f5d1a7872b912659470a67c89b19248c3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94646f734d8aaff6a1250fe7760a900300fcf0ac901450878f76bdc5aceb4a87
[INFO] running `Command { std: "docker" "start" "-a" "94646f734d8aaff6a1250fe7760a900300fcf0ac901450878f76bdc5aceb4a87", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling brainfuck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     output: Box<Write>,
[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] 19 -     output: Box<Write>,
[INFO] [stdout] 19 +     output: Box<dyn Write>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     input: 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] 20 -     input: Box<Read>
[INFO] [stdout] 20 +     input: Box<dyn Read>
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:74:45
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stdout] 74 + pub fn brainfuck(source: String, input: Box<dyn Read>, output: Box<Write>) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stdout] 74 + pub fn brainfuck(source: String, input: Box<Read>, output: Box<dyn Write>) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout] 24 +     fn new(input: Box<dyn Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:24:42
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout] 24 +     fn new(input: Box<Read>, output: Box<dyn Write>) -> BrainfuckContext {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.17s
[INFO] running `Command { std: "docker" "inspect" "94646f734d8aaff6a1250fe7760a900300fcf0ac901450878f76bdc5aceb4a87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94646f734d8aaff6a1250fe7760a900300fcf0ac901450878f76bdc5aceb4a87", kill_on_drop: false }`
[INFO] [stdout] 94646f734d8aaff6a1250fe7760a900300fcf0ac901450878f76bdc5aceb4a87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b88de5290ac246ad1ec24633dbb3a4f66deabddea3baa4eeede7f817b24a0f0
[INFO] running `Command { std: "docker" "start" "-a" "8b88de5290ac246ad1ec24633dbb3a4f66deabddea3baa4eeede7f817b24a0f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling brainfuck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     output: Box<Write>,
[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] 19 -     output: Box<Write>,
[INFO] [stdout] 19 +     output: Box<dyn Write>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     input: 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] 20 -     input: Box<Read>
[INFO] [stdout] 20 +     input: Box<dyn Read>
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:74:45
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stdout] 74 + pub fn brainfuck(source: String, input: Box<dyn Read>, output: Box<Write>) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:74:64
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stdout] 74 + pub fn brainfuck(source: String, input: Box<Read>, output: Box<dyn Write>) {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:24:23
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout] 24 +     fn new(input: Box<dyn Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/brainfuck.rs:24:42
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stdout] 24 +     fn new(input: Box<Read>, output: Box<dyn Write>) -> BrainfuckContext {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "8b88de5290ac246ad1ec24633dbb3a4f66deabddea3baa4eeede7f817b24a0f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b88de5290ac246ad1ec24633dbb3a4f66deabddea3baa4eeede7f817b24a0f0", kill_on_drop: false }`
[INFO] [stdout] 8b88de5290ac246ad1ec24633dbb3a4f66deabddea3baa4eeede7f817b24a0f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3a6cf51443eba42afe9b7615557655a6a8bb01a3e06cf70153ca454f67cc3741
[INFO] running `Command { std: "docker" "start" "-a" "3a6cf51443eba42afe9b7615557655a6a8bb01a3e06cf70153ca454f67cc3741", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:19:17
[INFO] [stderr]    |
[INFO] [stderr] 19 |     output: Box<Write>,
[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] 19 -     output: Box<Write>,
[INFO] [stderr] 19 +     output: Box<dyn Write>,
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |     input: 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] 20 -     input: Box<Read>
[INFO] [stderr] 20 +     input: Box<dyn Read>
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:74:45
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stderr] 74 + pub fn brainfuck(source: String, input: Box<dyn Read>, output: Box<Write>) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:74:64
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[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] 74 - pub fn brainfuck(source: String, input: Box<Read>, output: Box<Write>) {
[INFO] [stderr] 74 + pub fn brainfuck(source: String, input: Box<Read>, output: Box<dyn Write>) {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:24:23
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stderr] 24 +     fn new(input: Box<dyn Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/brainfuck.rs:24:42
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[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] 24 -     fn new(input: Box<Read>, output: Box<Write>) -> BrainfuckContext {
[INFO] [stderr] 24 +     fn new(input: Box<Read>, output: Box<dyn Write>) -> BrainfuckContext {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `brainfuck` (bin "brainfuck" test) generated 6 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/brainfuck-df13172ca5dc0477)
[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" "3a6cf51443eba42afe9b7615557655a6a8bb01a3e06cf70153ca454f67cc3741", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a6cf51443eba42afe9b7615557655a6a8bb01a3e06cf70153ca454f67cc3741", kill_on_drop: false }`
[INFO] [stdout] 3a6cf51443eba42afe9b7615557655a6a8bb01a3e06cf70153ca454f67cc3741