[INFO] cloning repository https://github.com/lawliet89/trait-obj [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lawliet89/trait-obj" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flawliet89%2Ftrait-obj", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flawliet89%2Ftrait-obj'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 63162d70145ef70587c640ee196519218ab9e1aa [INFO] testing lawliet89/trait-obj against 1.59.0 for beta-1.60-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flawliet89%2Ftrait-obj" "/workspace/builds/worker-4/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/lawliet89/trait-obj 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/lawliet89/trait-obj [INFO] finished tweaking git repo https://github.com/lawliet89/trait-obj [INFO] tweaked toml for git repo https://github.com/lawliet89/trait-obj written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/lawliet89/trait-obj 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] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 07bf45a52e60a7b99c64a07d705fd095aa3f8e2e5899a18b161b220bd6168b11 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "07bf45a52e60a7b99c64a07d705fd095aa3f8e2e5899a18b161b220bd6168b11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "07bf45a52e60a7b99c64a07d705fd095aa3f8e2e5899a18b161b220bd6168b11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "07bf45a52e60a7b99c64a07d705fd095aa3f8e2e5899a18b161b220bd6168b11", kill_on_drop: false }` [INFO] [stdout] 07bf45a52e60a7b99c64a07d705fd095aa3f8e2e5899a18b161b220bd6168b11 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f33e3c7b74b4193d8787b116e5e5e837ed7dbfd24daf3c72e8f695ff606744e3 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "f33e3c7b74b4193d8787b116e5e5e837ed7dbfd24daf3c72e8f695ff606744e3", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.21 [INFO] [stderr] Compiling rustc-serialize v0.3.23 [INFO] [stderr] Compiling byteorder v1.0.0 [INFO] [stderr] Compiling memchr v1.0.1 [INFO] [stderr] Compiling csv v0.15.0 [INFO] [stderr] Compiling trait-obj v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported [INFO] [stdout] --> src/main.rs:125:10 [INFO] [stdout] | [INFO] [stdout] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported [INFO] [stdout] --> src/main.rs:125:26 [INFO] [stdout] | [INFO] [stdout] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:50:20 [INFO] [stdout] | [INFO] [stdout] 50 | validator: Box, [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 50 - validator: Box, [INFO] [stdout] 50 + validator: Box, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:80:24 [INFO] [stdout] | [INFO] [stdout] 80 | validator: Box<&'a Validator>, [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 80 - validator: Box<&'a Validator>, [INFO] [stdout] 80 + validator: Box<&'a dyn Validator>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:54:53 [INFO] [stdout] | [INFO] [stdout] 54 | fn new(reader: csv::Reader, validator: Box) -> Self { [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 54 - fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stdout] 54 + fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:85:67 [INFO] [stdout] | [INFO] [stdout] 85 | fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 85 - fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [INFO] [stdout] 85 + fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a dyn Validator>) -> Self { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `byte_strings_to_string` [INFO] [stdout] --> src/main.rs:61:8 [INFO] [stdout] | [INFO] [stdout] 61 | fn byte_strings_to_string(record: Vec) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 5.98s [INFO] running `Command { std: "docker" "inspect" "f33e3c7b74b4193d8787b116e5e5e837ed7dbfd24daf3c72e8f695ff606744e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f33e3c7b74b4193d8787b116e5e5e837ed7dbfd24daf3c72e8f695ff606744e3", kill_on_drop: false }` [INFO] [stdout] f33e3c7b74b4193d8787b116e5e5e837ed7dbfd24daf3c72e8f695ff606744e3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 96e7cccf24d6b7d20e00211344c948dc15d827def980f60ed39b5447002ad724 [INFO] running `Command { std: "docker" "start" "-a" "96e7cccf24d6b7d20e00211344c948dc15d827def980f60ed39b5447002ad724", kill_on_drop: false }` [INFO] [stderr] Compiling trait-obj v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported [INFO] [stdout] --> src/main.rs:125:10 [INFO] [stdout] | [INFO] [stdout] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported [INFO] [stdout] --> src/main.rs:125:26 [INFO] [stdout] | [INFO] [stdout] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:50:20 [INFO] [stdout] | [INFO] [stdout] 50 | validator: Box, [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 50 - validator: Box, [INFO] [stdout] 50 + validator: Box, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:80:24 [INFO] [stdout] | [INFO] [stdout] 80 | validator: Box<&'a Validator>, [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 80 - validator: Box<&'a Validator>, [INFO] [stdout] 80 + validator: Box<&'a dyn Validator>, [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:54:53 [INFO] [stdout] | [INFO] [stdout] 54 | fn new(reader: csv::Reader, validator: Box) -> Self { [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 54 - fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stdout] 54 + fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:85:67 [INFO] [stdout] | [INFO] [stdout] 85 | fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [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 [INFO] [stdout] help: use `dyn` [INFO] [stdout] | [INFO] [stdout] 85 - fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [INFO] [stdout] 85 + fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a dyn Validator>) -> Self { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `byte_strings_to_string` [INFO] [stdout] --> src/main.rs:61:8 [INFO] [stdout] | [INFO] [stdout] 61 | fn byte_strings_to_string(record: Vec) -> String { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.08s [INFO] running `Command { std: "docker" "inspect" "96e7cccf24d6b7d20e00211344c948dc15d827def980f60ed39b5447002ad724", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "96e7cccf24d6b7d20e00211344c948dc15d827def980f60ed39b5447002ad724", kill_on_drop: false }` [INFO] [stdout] 96e7cccf24d6b7d20e00211344c948dc15d827def980f60ed39b5447002ad724 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1c98d017f76a524a9052fe0630fa49e5983e83561f11ca694a285b5c98157f44 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "1c98d017f76a524a9052fe0630fa49e5983e83561f11ca694a285b5c98157f44", kill_on_drop: false }` [INFO] [stdout] [INFO] [stderr] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported [INFO] [stdout] running 0 tests [INFO] [stderr] --> src/main.rs:125:10 [INFO] [stdout] [INFO] [stderr] | [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stdout] [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] [INFO] [stderr] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported [INFO] [stderr] --> src/main.rs:125:26 [INFO] [stderr] | [INFO] [stderr] 125 | #[derive(RustcDecodable, RustcEncodable, Debug)] [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:50:20 [INFO] [stderr] | [INFO] [stderr] 50 | validator: Box, [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 [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 50 - validator: Box, [INFO] [stderr] 50 + validator: Box, [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:80:24 [INFO] [stderr] | [INFO] [stderr] 80 | validator: Box<&'a Validator>, [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 [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 80 - validator: Box<&'a Validator>, [INFO] [stderr] 80 + validator: Box<&'a dyn Validator>, [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:54:53 [INFO] [stderr] | [INFO] [stderr] 54 | fn new(reader: csv::Reader, validator: Box) -> Self { [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 [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 54 - fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stderr] 54 + fn new(reader: csv::Reader, validator: Box) -> Self { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:85:67 [INFO] [stderr] | [INFO] [stderr] 85 | fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [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 [INFO] [stderr] help: use `dyn` [INFO] [stderr] | [INFO] [stderr] 85 - fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a Validator>) -> Self { [INFO] [stderr] 85 + fn new(records: csv::ByteRecords<'a, Rdr>, validator: Box<&'a dyn Validator>) -> Self { [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `byte_strings_to_string` [INFO] [stderr] --> src/main.rs:61:8 [INFO] [stderr] | [INFO] [stderr] 61 | fn byte_strings_to_string(record: Vec) -> String { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `trait-obj` (bin "trait-obj" test) generated 7 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/trait_obj-43cb6dae1fc8c882) [INFO] running `Command { std: "docker" "inspect" "1c98d017f76a524a9052fe0630fa49e5983e83561f11ca694a285b5c98157f44", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1c98d017f76a524a9052fe0630fa49e5983e83561f11ca694a285b5c98157f44", kill_on_drop: false }` [INFO] [stdout] 1c98d017f76a524a9052fe0630fa49e5983e83561f11ca694a285b5c98157f44