[INFO] fetching crate puzzle_cube 0.1.3...
[INFO] checking puzzle_cube-0.1.3 against master#db870ea71b6dcc7a91b999420b88f41d3cdd13e1 for pr-75192
[INFO] extracting crate puzzle_cube 0.1.3 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate puzzle_cube 0.1.3 on toolchain db870ea71b6dcc7a91b999420b88f41d3cdd13e1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate puzzle_cube 0.1.3
[INFO] finished tweaking crates.io crate puzzle_cube 0.1.3
[INFO] tweaked toml for crates.io crate puzzle_cube 0.1.3 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate puzzle_cube 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b788411b3ca3e5a758b15efd72e206ef9b521ef2a922bc46fe010a85d161584c
[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" "b788411b3ca3e5a758b15efd72e206ef9b521ef2a922bc46fe010a85d161584c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b788411b3ca3e5a758b15efd72e206ef9b521ef2a922bc46fe010a85d161584c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b788411b3ca3e5a758b15efd72e206ef9b521ef2a922bc46fe010a85d161584c", kill_on_drop: false }`
[INFO] [stdout] b788411b3ca3e5a758b15efd72e206ef9b521ef2a922bc46fe010a85d161584c
[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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+db870ea71b6dcc7a91b999420b88f41d3cdd13e1" "check" "--frozen" "--all" "--all-targets" "--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] 52324c3c591e2a2e57a9139c6ff16191db68ae8581ed0bbfb5b20319dac2cfad
[INFO] running `Command { std: "docker" "start" "-a" "52324c3c591e2a2e57a9139c6ff16191db68ae8581ed0bbfb5b20319dac2cfad", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking getch v0.2.1
[INFO] [stderr]    Compiling puzzle_cube v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]    --> src/cube.rs:435:23
[INFO] [stdout]     |
[INFO] [stdout] 435 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]  --> src/main.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]    --> src/cube.rs:435:23
[INFO] [stdout]     |
[INFO] [stdout] 435 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]  --> src/main.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/cube.rs:461:13
[INFO] [stdout]     |
[INFO] [stdout] 461 |             _ => (),
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `selected` is never read
[INFO] [stdout]    --> src/main.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     selected = true;
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `selected` is never read
[INFO] [stdout]    --> src/main.rs:146:21
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     selected = true;
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/main.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |         let input = str::from_utf8(get).unwrap();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/cube.rs:461:13
[INFO] [stdout]     |
[INFO] [stdout] 461 |             _ => (),
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `selected` is never read
[INFO] [stdout]    --> src/main.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                     selected = true;
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `selected` is never read
[INFO] [stdout]    --> src/main.rs:146:21
[INFO] [stdout]     |
[INFO] [stdout] 146 |                     selected = true;
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/main.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 |         let input = str::from_utf8(get).unwrap();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/cube.rs:464:9
[INFO] [stdout]     |
[INFO] [stdout] 464 |         write!(&mut stdout, "\u{25A0} ");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/cube.rs:464:9
[INFO] [stdout]     |
[INFO] [stdout] 464 |         write!(&mut stdout, "\u{25A0} ");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.81s
[INFO] running `Command { std: "docker" "inspect" "52324c3c591e2a2e57a9139c6ff16191db68ae8581ed0bbfb5b20319dac2cfad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52324c3c591e2a2e57a9139c6ff16191db68ae8581ed0bbfb5b20319dac2cfad", kill_on_drop: false }`
[INFO] [stdout] 52324c3c591e2a2e57a9139c6ff16191db68ae8581ed0bbfb5b20319dac2cfad