[INFO] updating cached repository https://github.com/bartsmykla/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2641c2191be0ef671f1326ba3ccdd1c861bb9054
[INFO] testing bartsmykla/rust_learning against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbartsmykla%2Frust_learning" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bartsmykla/rust_learning on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bartsmykla/rust_learning
[INFO] finished tweaking git repo https://github.com/bartsmykla/rust_learning
[INFO] tweaked toml for git repo https://github.com/bartsmykla/rust_learning written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/bartsmykla/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc4c7e7b0adc93a25d9cab2b718d8a76a52739f2a54cb3fd5e0a6cd3a1908b28
[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" "cc4c7e7b0adc93a25d9cab2b718d8a76a52739f2a54cb3fd5e0a6cd3a1908b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc4c7e7b0adc93a25d9cab2b718d8a76a52739f2a54cb3fd5e0a6cd3a1908b28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc4c7e7b0adc93a25d9cab2b718d8a76a52739f2a54cb3fd5e0a6cd3a1908b28", kill_on_drop: false }`
[INFO] [stdout] cc4c7e7b0adc93a25d9cab2b718d8a76a52739f2a54cb3fd5e0a6cd3a1908b28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9e1f9b696d89f466e6f0c80053b9691018db2d3269c6fa5b884bbdc9f40353f
[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" "d9e1f9b696d89f466e6f0c80053b9691018db2d3269c6fa5b884bbdc9f40353f", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/advanced_features.rs:226:57
[INFO] [stdout]     |
[INFO] [stdout] 226 |     let _obj = Box::new(Ball { diameter: &num }) as Box<Red>;
[INFO] [stdout]     |                                                         ^^^ help: use `dyn`: `dyn Red`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:186:32
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:214:32
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:235:34
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn print_section(name: &str, f: &Fn()) {
[INFO] [stdout]     |                                  ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:274:27
[INFO] [stdout]     |
[INFO] [stdout] 274 |     fn create_fn() -> Box<Fn()> {
[INFO] [stdout]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:280:30
[INFO] [stdout]     |
[INFO] [stdout] 280 |     fn create_fnmut() -> Box<FnMut()> {
[INFO] [stdout]     |                              ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/sections/traits.rs:281:55
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stdout]     |                                                       ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/helpers.rs:33:39
[INFO] [stdout]    |
[INFO] [stdout] 33 |     subsections: HashMap<&'a str, Box<Fn()>>,
[INFO] [stdout]    |                                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/sections/error_handling.rs:210:53
[INFO] [stdout]     |
[INFO] [stdout] 210 |             MyCustomWrappedError::Parse(ref e) => e.description(),
[INFO] [stdout]     |                                                     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `Command { std: "docker" "inspect" "d9e1f9b696d89f466e6f0c80053b9691018db2d3269c6fa5b884bbdc9f40353f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9e1f9b696d89f466e6f0c80053b9691018db2d3269c6fa5b884bbdc9f40353f", kill_on_drop: false }`
[INFO] [stdout] d9e1f9b696d89f466e6f0c80053b9691018db2d3269c6fa5b884bbdc9f40353f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5a8a0b477da6fafa8faf29f7f0b0f5a0be6c79b9759f79dcca15c1ddbdbcba3
[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" "c5a8a0b477da6fafa8faf29f7f0b0f5a0be6c79b9759f79dcca15c1ddbdbcba3", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/advanced_features.rs:226:57
[INFO] [stdout]     |
[INFO] [stdout] 226 |     let _obj = Box::new(Ball { diameter: &num }) as Box<Red>;
[INFO] [stdout]     |                                                         ^^^ help: use `dyn`: `dyn Red`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:186:32
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:214:32
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:235:34
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn print_section(name: &str, f: &Fn()) {
[INFO] [stdout]     |                                  ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:274:27
[INFO] [stdout]     |
[INFO] [stdout] 274 |     fn create_fn() -> Box<Fn()> {
[INFO] [stdout]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:280:30
[INFO] [stdout]     |
[INFO] [stdout] 280 |     fn create_fnmut() -> Box<FnMut()> {
[INFO] [stdout]     |                              ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/sections/traits.rs:281:55
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stdout]     |                                                       ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/helpers.rs:33:39
[INFO] [stdout]    |
[INFO] [stdout] 33 |     subsections: HashMap<&'a str, Box<Fn()>>,
[INFO] [stdout]    |                                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/sections/error_handling.rs:210:53
[INFO] [stdout]     |
[INFO] [stdout] 210 |             MyCustomWrappedError::Parse(ref e) => e.description(),
[INFO] [stdout]     |                                                     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/advanced_features.rs:226:57
[INFO] [stdout]     |
[INFO] [stdout] 226 |     let _obj = Box::new(Ball { diameter: &num }) as Box<Red>;
[INFO] [stdout]     |                                                         ^^^ help: use `dyn`: `dyn Red`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:186:32
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:214:32
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/error_handling.rs:235:34
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn print_section(name: &str, f: &Fn()) {
[INFO] [stdout]     |                                  ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:274:27
[INFO] [stdout]     |
[INFO] [stdout] 274 |     fn create_fn() -> Box<Fn()> {
[INFO] [stdout]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/sections/functions.rs:280:30
[INFO] [stdout]     |
[INFO] [stdout] 280 |     fn create_fnmut() -> Box<FnMut()> {
[INFO] [stdout]     |                              ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/sections/traits.rs:281:55
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stdout]     |                                                       ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/helpers.rs:33:39
[INFO] [stdout]    |
[INFO] [stdout] 33 |     subsections: HashMap<&'a str, Box<Fn()>>,
[INFO] [stdout]    |                                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/sections/error_handling.rs:210:53
[INFO] [stdout]     |
[INFO] [stdout] 210 |             MyCustomWrappedError::Parse(ref e) => e.description(),
[INFO] [stdout]     |                                                     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "c5a8a0b477da6fafa8faf29f7f0b0f5a0be6c79b9759f79dcca15c1ddbdbcba3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5a8a0b477da6fafa8faf29f7f0b0f5a0be6c79b9759f79dcca15c1ddbdbcba3", kill_on_drop: false }`
[INFO] [stdout] c5a8a0b477da6fafa8faf29f7f0b0f5a0be6c79b9759f79dcca15c1ddbdbcba3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8dbb21c91ed789682210531f0d913452d4532feb94186bc9b9e9f1e71a284d58
[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" "8dbb21c91ed789682210531f0d913452d4532feb94186bc9b9e9f1e71a284d58", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/advanced_features.rs:226:57
[INFO] [stderr]     |
[INFO] [stderr] 226 |     let _obj = Box::new(Ball { diameter: &num }) as Box<Red>;
[INFO] [stderr]     |                                                         ^^^ help: use `dyn`: `dyn Red`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:186:32
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:214:32
[INFO] [stderr]     |
[INFO] [stderr] 214 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:235:34
[INFO] [stderr]     |
[INFO] [stderr] 235 | fn print_section(name: &str, f: &Fn()) {
[INFO] [stderr]     |                                  ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/functions.rs:274:27
[INFO] [stderr]     |
[INFO] [stderr] 274 |     fn create_fn() -> Box<Fn()> {
[INFO] [stderr]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/functions.rs:280:30
[INFO] [stderr]     |
[INFO] [stderr] 280 |     fn create_fnmut() -> Box<FnMut()> {
[INFO] [stderr]     |                              ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/sections/traits.rs:281:55
[INFO] [stderr]     |
[INFO] [stderr] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stderr]     |                                                       ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/helpers.rs:33:39
[INFO] [stderr]    |
[INFO] [stderr] 33 |     subsections: HashMap<&'a str, Box<Fn()>>,
[INFO] [stderr]    |                                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/sections/error_handling.rs:210:53
[INFO] [stderr]     |
[INFO] [stderr] 210 |             MyCustomWrappedError::Parse(ref e) => e.description(),
[INFO] [stderr]     |                                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/advanced_features.rs:226:57
[INFO] [stderr]     |
[INFO] [stderr] 226 |     let _obj = Box::new(Ball { diameter: &num }) as Box<Red>;
[INFO] [stderr]     |                                                         ^^^ help: use `dyn`: `dyn Red`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:186:32
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:214:32
[INFO] [stderr]     |
[INFO] [stderr] 214 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/error_handling.rs:235:34
[INFO] [stderr]     |
[INFO] [stderr] 235 | fn print_section(name: &str, f: &Fn()) {
[INFO] [stderr]     |                                  ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/functions.rs:274:27
[INFO] [stderr]     |
[INFO] [stderr] 274 |     fn create_fn() -> Box<Fn()> {
[INFO] [stderr]     |                           ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/sections/functions.rs:280:30
[INFO] [stderr]     |
[INFO] [stderr] 280 |     fn create_fnmut() -> Box<FnMut()> {
[INFO] [stderr]     |                              ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/sections/traits.rs:281:55
[INFO] [stderr]     |
[INFO] [stderr] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stderr]     |                                                       ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/helpers.rs:33:39
[INFO] [stderr]    |
[INFO] [stderr] 33 |     subsections: HashMap<&'a str, Box<Fn()>>,
[INFO] [stderr]    |                                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/sections/error_handling.rs:210:53
[INFO] [stderr]     |
[INFO] [stderr] 210 |             MyCustomWrappedError::Parse(ref e) => e.description(),
[INFO] [stderr]     |                                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/learning-03598ff15039006f
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/main-b5495587ef63e235
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests learning
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> /opt/rustwide/workdir/src/sections/traits.rs:281:55
[INFO] [stderr]     |
[INFO] [stderr] 281 |                 println!("> Foo.add(Bar) was called");;
[INFO] [stderr]     |                                                       ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8dbb21c91ed789682210531f0d913452d4532feb94186bc9b9e9f1e71a284d58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8dbb21c91ed789682210531f0d913452d4532feb94186bc9b9e9f1e71a284d58", kill_on_drop: false }`
[INFO] [stdout] 8dbb21c91ed789682210531f0d913452d4532feb94186bc9b9e9f1e71a284d58