[INFO] fetching crate itree 0.3.1...
[INFO] checking itree-0.3.1 against 1.55.0 for beta-1.56-3
[INFO] extracting crate itree 0.3.1 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate itree 0.3.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate itree 0.3.1
[INFO] finished tweaking crates.io crate itree 0.3.1
[INFO] tweaked toml for crates.io crate itree 0.3.1 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread_local v1.1.3
[INFO] [stderr]   Downloaded globset v0.4.8
[INFO] [stderr]   Downloaded bstr v0.2.17
[INFO] [stderr]   Downloaded redox_termios v0.1.2
[INFO] [stderr]   Downloaded ignore v0.4.18
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] [stderr]   Downloaded indextree v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2791f8945f99a4cb116e493d346d4e57552ee4f4beac5ce9c7a3779dcd187955
[INFO] running `Command { std: "docker" "start" "-a" "2791f8945f99a4cb116e493d346d4e57552ee4f4beac5ce9c7a3779dcd187955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2791f8945f99a4cb116e493d346d4e57552ee4f4beac5ce9c7a3779dcd187955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2791f8945f99a4cb116e493d346d4e57552ee4f4beac5ce9c7a3779dcd187955", kill_on_drop: false }`
[INFO] [stdout] 2791f8945f99a4cb116e493d346d4e57552ee4f4beac5ce9c7a3779dcd187955
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 280a657429d06802637a8cf2a677a7252b2373eea930ab3ba9b974441b150fa0
[INFO] running `Command { std: "docker" "start" "-a" "280a657429d06802637a8cf2a677a7252b2373eea930ab3ba9b974441b150fa0", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking indextree v1.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking itree v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/options.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fg_color: Box<Color>,
[INFO] [stdout]   |                       ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub bg_color: Box<Color>,
[INFO] [stdout]   |                       ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:26:43
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn fg_color(&mut self, color: Box<Color>) -> &mut Self {
[INFO] [stdout]    |                                           ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:31:43
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn bg_color(&mut self, color: Box<Color>) -> &mut Self {
[INFO] [stdout]    |                                           ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:8:23
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub fg_color: Box<Color>,
[INFO] [stdout]   |                       ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:9:23
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub bg_color: Box<Color>,
[INFO] [stdout]   |                       ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:26:43
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn fg_color(&mut self, color: Box<Color>) -> &mut Self {
[INFO] [stdout]    |                                           ^^^^^ help: use `dyn`: `dyn Color`
[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 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/options.rs:31:43
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn bg_color(&mut self, color: Box<Color>) -> &mut Self {
[INFO] [stdout]    |                                           ^^^^^ help: use `dyn`: `dyn Color`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[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/args.rs:109:37
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn string_to_color(cs: &str) -> Box<color::Color> {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^ help: use `dyn`: `dyn color::Color`
[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 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/args.rs:109:37
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn string_to_color(cs: &str) -> Box<color::Color> {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^ help: use `dyn`: `dyn color::Color`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.59s
[INFO] running `Command { std: "docker" "inspect" "280a657429d06802637a8cf2a677a7252b2373eea930ab3ba9b974441b150fa0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "280a657429d06802637a8cf2a677a7252b2373eea930ab3ba9b974441b150fa0", kill_on_drop: false }`
[INFO] [stdout] 280a657429d06802637a8cf2a677a7252b2373eea930ab3ba9b974441b150fa0
