[INFO] cloning repository https://github.com/marans/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marans/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarans%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarans%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5181cdce37fdbb9de336ed3ee0b123c6da593b95
[INFO] testing marans/rlox against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarans%2Frlox" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marans/rlox on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marans/rlox
[INFO] finished tweaking git repo https://github.com/marans/rlox
[INFO] tweaked toml for git repo https://github.com/marans/rlox written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/marans/rlox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f6c6dfa1188f53f0b27018037a92537141e52853e1ac9a9ea34a8968adcb29c
[INFO] running `Command { std: "docker" "start" "-a" "1f6c6dfa1188f53f0b27018037a92537141e52853e1ac9a9ea34a8968adcb29c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f6c6dfa1188f53f0b27018037a92537141e52853e1ac9a9ea34a8968adcb29c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f6c6dfa1188f53f0b27018037a92537141e52853e1ac9a9ea34a8968adcb29c", kill_on_drop: false }`
[INFO] [stdout] 1f6c6dfa1188f53f0b27018037a92537141e52853e1ac9a9ea34a8968adcb29c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02f37391d227bf0235c1c2ec483eaf47034aaf3affb0d2726daced9b9efb53cc
[INFO] running `Command { std: "docker" "start" "-a" "02f37391d227bf0235c1c2ec483eaf47034aaf3affb0d2726daced9b9efb53cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/compiler/mod.rs:47:28
[INFO] [stdout]    |
[INFO] [stdout] 47 | type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[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 2018) 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] 47 - type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[INFO] [stdout] 47 + type ParseFn =  Option<Box<dyn Fn(&mut Compiler)>>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:21:59
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                                           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 21 -     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 21 +     pub fn interpret(&mut self, source: String, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:64:33
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 64 -     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 64 +     fn run(&mut self, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/vm/mod.rs:74:21
[INFO] [stdout]    |
[INFO] [stdout] 74 |                     write!(out, "{:?}", self.stack.pop().unwrap());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "02f37391d227bf0235c1c2ec483eaf47034aaf3affb0d2726daced9b9efb53cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02f37391d227bf0235c1c2ec483eaf47034aaf3affb0d2726daced9b9efb53cc", kill_on_drop: false }`
[INFO] [stdout] 02f37391d227bf0235c1c2ec483eaf47034aaf3affb0d2726daced9b9efb53cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f313208792dade4b4f0a316af1e76245c6f076872e4d7088377a9d8437482642
[INFO] running `Command { std: "docker" "start" "-a" "f313208792dade4b4f0a316af1e76245c6f076872e4d7088377a9d8437482642", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/compiler/mod.rs:47:28
[INFO] [stdout]    |
[INFO] [stdout] 47 | type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[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 2018) 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] 47 - type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[INFO] [stdout] 47 + type ParseFn =  Option<Box<dyn Fn(&mut Compiler)>>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:21:59
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                                           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 21 -     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 21 +     pub fn interpret(&mut self, source: String, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:64:33
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 64 -     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 64 +     fn run(&mut self, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/vm/mod.rs:74:21
[INFO] [stdout]    |
[INFO] [stdout] 74 |                     write!(out, "{:?}", self.stack.pop().unwrap());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/compiler/mod.rs:47:28
[INFO] [stdout]    |
[INFO] [stdout] 47 | type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[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 2018) 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] 47 - type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[INFO] [stdout] 47 + type ParseFn =  Option<Box<dyn Fn(&mut Compiler)>>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:21:59
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                                           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 21 -     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 21 +     pub fn interpret(&mut self, source: String, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/vm/mod.rs:64:33
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout]    |                                 ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 64 -     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stdout] 64 +     fn run(&mut self, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/vm/mod.rs:74:21
[INFO] [stdout]    |
[INFO] [stdout] 74 |                     write!(out, "{:?}", self.stack.pop().unwrap());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "f313208792dade4b4f0a316af1e76245c6f076872e4d7088377a9d8437482642", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f313208792dade4b4f0a316af1e76245c6f076872e4d7088377a9d8437482642", kill_on_drop: false }`
[INFO] [stdout] f313208792dade4b4f0a316af1e76245c6f076872e4d7088377a9d8437482642
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e8980e66a2d4e29699b8b3464e3de72c2a38680beb808e4d5a3946d0109bab54
[INFO] running `Command { std: "docker" "start" "-a" "e8980e66a2d4e29699b8b3464e3de72c2a38680beb808e4d5a3946d0109bab54", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler/mod.rs:47:28
[INFO] [stderr]    |
[INFO] [stderr] 47 | type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[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 2018) 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] 47 - type ParseFn =  Option<Box<Fn(&mut Compiler)>>;
[INFO] [stderr] 47 + type ParseFn =  Option<Box<dyn Fn(&mut Compiler)>>;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/vm/mod.rs:21:59
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stderr]    |                                                           ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) 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] 21 -     pub fn interpret(&mut self, source: String, out: &mut io::Write) -> InterpretResult {
[INFO] [stderr] 21 +     pub fn interpret(&mut self, source: String, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/vm/mod.rs:64:33
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stderr]    |                                 ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) 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] 64 -     fn run(&mut self, out: &mut io::Write) -> InterpretResult {
[INFO] [stderr] 64 +     fn run(&mut self, out: &mut dyn io::Write) -> InterpretResult {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/vm/mod.rs:74:21
[INFO] [stderr]    |
[INFO] [stderr] 74 |                     write!(out, "{:?}", self.stack.pop().unwrap());
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `rlox` (lib) generated 4 warnings
[INFO] [stderr] warning: `rlox` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rlox-6fb7f0310cbc4e09)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test scanner::test::expressions ... ok
[INFO] [stdout] test scanner::test::identifier ... ok
[INFO] [stdout] test scanner::test::keyword_for ... ok
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rlox-de3ab50e9c735400)
[INFO] [stdout] test scanner::test::keyword_class ... ok
[INFO] [stdout] test scanner::test::keyword_this ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 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] [stderr]      Running tests/integration_test.rs (/opt/rustwide/target/debug/deps/integration_test-52ad1b75cf1fb089)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test expr ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rlox
[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" "e8980e66a2d4e29699b8b3464e3de72c2a38680beb808e4d5a3946d0109bab54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8980e66a2d4e29699b8b3464e3de72c2a38680beb808e4d5a3946d0109bab54", kill_on_drop: false }`
[INFO] [stdout] e8980e66a2d4e29699b8b3464e3de72c2a38680beb808e4d5a3946d0109bab54