[INFO] cloning repository https://github.com/xieyuheng/sicp-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xieyuheng/sicp-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxieyuheng%2Fsicp-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxieyuheng%2Fsicp-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ffadb86c09f511bcb6407a211d1798d75b5da391
[INFO] testing xieyuheng/sicp-rs against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxieyuheng%2Fsicp-rs" "/workspace/builds/worker-111/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-111/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xieyuheng/sicp-rs on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xieyuheng/sicp-rs
[INFO] finished tweaking git repo https://github.com/xieyuheng/sicp-rs
[INFO] tweaked toml for git repo https://github.com/xieyuheng/sicp-rs written to /workspace/builds/worker-111/source/Cargo.toml
[INFO] crate git repo https://github.com/xieyuheng/sicp-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ee68223bc6e51bd4ab10093beadd9a88ffd83248a1c14fdd7db57e74fa4fa82
[INFO] running `Command { std: "docker" "start" "-a" "5ee68223bc6e51bd4ab10093beadd9a88ffd83248a1c14fdd7db57e74fa4fa82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ee68223bc6e51bd4ab10093beadd9a88ffd83248a1c14fdd7db57e74fa4fa82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ee68223bc6e51bd4ab10093beadd9a88ffd83248a1c14fdd7db57e74fa4fa82", kill_on_drop: false }`
[INFO] [stdout] 5ee68223bc6e51bd4ab10093beadd9a88ffd83248a1c14fdd7db57e74fa4fa82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-111/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d81194562063b8e993ed470adac51a45aaa82d8c2335ac19abcccc66dbc8ff4
[INFO] running `Command { std: "docker" "start" "-a" "9d81194562063b8e993ed470adac51a45aaa82d8c2335ac19abcccc66dbc8ff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling sicp v0.1.0 (/opt/rustwide/workdir/sicp)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> sicp/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(uniform_paths)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `uniform_paths` has been stable since 1.32.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> sicp/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> sicp/src/ch_1_3.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 |     term: &Fn (f64) -> f64, a: f64,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]   --> sicp/src/ch_1_3.rs:86:12
[INFO] [stdout]    |
[INFO] [stdout] 86 |     next: &Fn (f64) -> f64, b: f64,
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:144:14
[INFO] [stdout]     |
[INFO] [stdout] 144 |         f: & Fn (f64) -> f64,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:170:10
[INFO] [stdout]     |
[INFO] [stdout] 170 |     f: & Fn (f64) -> f64,
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:224:17
[INFO] [stdout]     |
[INFO] [stdout] 224 |         term: & Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:225:17
[INFO] [stdout]     |
[INFO] [stdout] 225 |         next: & Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:239:17
[INFO] [stdout]     |
[INFO] [stdout] 239 |         term: & Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:240:17
[INFO] [stdout]     |
[INFO] [stdout] 240 |         next: & Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:261:13
[INFO] [stdout]     |
[INFO] [stdout] 261 |     term: & Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:262:13
[INFO] [stdout]     |
[INFO] [stdout] 262 |     next: & Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:290:16
[INFO] [stdout]     |
[INFO] [stdout] 290 |     combiner: &Fn (f64, f64) -> f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64, f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:292:12
[INFO] [stdout]     |
[INFO] [stdout] 292 |     term: &Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:293:12
[INFO] [stdout]     |
[INFO] [stdout] 293 |     next: &Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:323:16
[INFO] [stdout]     |
[INFO] [stdout] 323 |         term: &Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:324:16
[INFO] [stdout]     |
[INFO] [stdout] 324 |         next: &Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:330:16
[INFO] [stdout]     |
[INFO] [stdout] 330 |         term: &Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:331:16
[INFO] [stdout]     |
[INFO] [stdout] 331 |         next: &Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:368:16
[INFO] [stdout]     |
[INFO] [stdout] 368 |     combiner: &Fn (f64, f64) -> f64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64, f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:370:12
[INFO] [stdout]     |
[INFO] [stdout] 370 |     term: &Fn (f64) -> f64, a: f64,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:371:12
[INFO] [stdout]     |
[INFO] [stdout] 371 |     next: &Fn (f64) -> f64, b: f64,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:372:14
[INFO] [stdout]     |
[INFO] [stdout] 372 |     filter: &Fn (f64) -> bool,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> bool`
[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]    --> sicp/src/ch_1_3.rs:426:14
[INFO] [stdout]     |
[INFO] [stdout] 426 |         f: & Fn (f64) -> f64,
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:455:9
[INFO] [stdout]     |
[INFO] [stdout] 455 |     f: &Fn (f64) -> f64,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:479:9
[INFO] [stdout]     |
[INFO] [stdout] 479 |     f: &Fn (f64) -> f64,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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: unnecessary trailing semicolon
[INFO] [stdout]    --> sicp/src/ch_1_3.rs:489:13
[INFO] [stdout]     |
[INFO] [stdout] 489 |     } else {;
[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]    --> sicp/src/ch_1_3.rs:515:9
[INFO] [stdout]     |
[INFO] [stdout] 515 |     f: &Fn (f64) -> f64,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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]    --> sicp/src/ch_1_3.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |         f: &Fn (f64) -> f64,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn (f64) -> f64`
[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] error: aborting due to 2 previous errors; 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sicp` due to 3 previous errors; 27 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9d81194562063b8e993ed470adac51a45aaa82d8c2335ac19abcccc66dbc8ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d81194562063b8e993ed470adac51a45aaa82d8c2335ac19abcccc66dbc8ff4", kill_on_drop: false }`
[INFO] [stdout] 9d81194562063b8e993ed470adac51a45aaa82d8c2335ac19abcccc66dbc8ff4
