[INFO] cloning repository https://github.com/flavius/playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flavius/playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflavius%2Fplayground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflavius%2Fplayground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b05c504c9696591db10de3235818bd6bda6d13b2
[INFO] checking flavius/playground against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflavius%2Fplayground" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/flavius/playground on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/flavius/playground
[INFO] finished tweaking git repo https://github.com/flavius/playground
[INFO] tweaked toml for git repo https://github.com/flavius/playground written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/flavius/playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60d53732fe6f93bd1b723116be7fdd921651d7626f039b09e4e7a5974280cecd
[INFO] running `Command { std: "docker" "start" "-a" "60d53732fe6f93bd1b723116be7fdd921651d7626f039b09e4e7a5974280cecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60d53732fe6f93bd1b723116be7fdd921651d7626f039b09e4e7a5974280cecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60d53732fe6f93bd1b723116be7fdd921651d7626f039b09e4e7a5974280cecd", kill_on_drop: false }`
[INFO] [stdout] 60d53732fe6f93bd1b723116be7fdd921651d7626f039b09e4e7a5974280cecd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f96a49f389f6d17f96a80446ca817c87d60bdf74da3cc86076484a2d0a757ff
[INFO] running `Command { std: "docker" "start" "-a" "2f96a49f389f6d17f96a80446ca817c87d60bdf74da3cc86076484a2d0a757ff", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-ddd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:36
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn sort_specifications(specs: Vec<&PluginSpecification>) -> Vec<&PluginSpecification> {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:66
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn sort_specifications(specs: Vec<&PluginSpecification>) -> Vec<&PluginSpecification> {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:222:21
[INFO] [stdout]     |
[INFO] [stdout] 222 |     let deps : Vec<&PluginSpecification> = vec![
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:36
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn sort_specifications(specs: Vec<&PluginSpecification>) -> Vec<&PluginSpecification> {
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:66
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn sort_specifications(specs: Vec<&PluginSpecification>) -> Vec<&PluginSpecification> {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:222:21
[INFO] [stdout]     |
[INFO] [stdout] 222 |     let deps : Vec<&PluginSpecification> = vec![
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn PluginSpecification`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sorted_specs`
[INFO] [stdout]    --> src/main.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |     let sorted_specs = sort_specifications(deps);
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_specs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sorted_specs`
[INFO] [stdout]    --> src/main.rs:228:9
[INFO] [stdout]     |
[INFO] [stdout] 228 |     let sorted_specs = sort_specifications(deps);
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sorted_specs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `deps`
[INFO] [stdout]    --> src/main.rs:190:12
[INFO] [stdout]     |
[INFO] [stdout] 190 |     fn new(deps: Self::Specification) -> Self {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_deps`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut sorted = vec![];
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut sorted = vec![];
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `addDependency` should have a snake case name
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn addDependency(&mut self, what: usize, dependency: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^ help: convert the identifier to snake case: `add_dependency`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `addDependency` should have a snake case name
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn addDependency(&mut self, what: usize, dependency: usize) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^ help: convert the identifier to snake case: `add_dependency`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "2f96a49f389f6d17f96a80446ca817c87d60bdf74da3cc86076484a2d0a757ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f96a49f389f6d17f96a80446ca817c87d60bdf74da3cc86076484a2d0a757ff", kill_on_drop: false }`
[INFO] [stdout] 2f96a49f389f6d17f96a80446ca817c87d60bdf74da3cc86076484a2d0a757ff