[INFO] cloning repository https://github.com/CaryWillard/TowerOfHanoi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CaryWillard/TowerOfHanoi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaryWillard%2FTowerOfHanoi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaryWillard%2FTowerOfHanoi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b58fc49f22ee80a5bc957191e4b5572a3385e8f6
[INFO] testing CaryWillard/TowerOfHanoi against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCaryWillard%2FTowerOfHanoi" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CaryWillard/TowerOfHanoi on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CaryWillard/TowerOfHanoi
[INFO] finished tweaking git repo https://github.com/CaryWillard/TowerOfHanoi
[INFO] tweaked toml for git repo https://github.com/CaryWillard/TowerOfHanoi written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/CaryWillard/TowerOfHanoi already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28ac50cdb821c1772f09af57ee8737f273d78d16f34a080d93af0b9da74b7a10
[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" "28ac50cdb821c1772f09af57ee8737f273d78d16f34a080d93af0b9da74b7a10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28ac50cdb821c1772f09af57ee8737f273d78d16f34a080d93af0b9da74b7a10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28ac50cdb821c1772f09af57ee8737f273d78d16f34a080d93af0b9da74b7a10", kill_on_drop: false }`
[INFO] [stdout] 28ac50cdb821c1772f09af57ee8737f273d78d16f34a080d93af0b9da74b7a10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--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] 032b6bfa2016085e1fe86a2b86f8e3b2562522151d197bc4163987e4ad68752f
[INFO] running `Command { std: "docker" "start" "-a" "032b6bfa2016085e1fe86a2b86f8e3b2562522151d197bc4163987e4ad68752f", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower_of_hanoi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `ring`
[INFO] [stdout]   --> src/main.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     ring: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:48:20
[INFO] [stdout]    |
[INFO] [stdout] 48 |             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 48 -             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stdout] 48 +             panic!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers);
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "032b6bfa2016085e1fe86a2b86f8e3b2562522151d197bc4163987e4ad68752f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "032b6bfa2016085e1fe86a2b86f8e3b2562522151d197bc4163987e4ad68752f", kill_on_drop: false }`
[INFO] [stdout] 032b6bfa2016085e1fe86a2b86f8e3b2562522151d197bc4163987e4ad68752f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--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] 699bbc7b73cb3e9d5102676ff8364f8e42f872a8c4af1114b43f0dbf474984c1
[INFO] running `Command { std: "docker" "start" "-a" "699bbc7b73cb3e9d5102676ff8364f8e42f872a8c4af1114b43f0dbf474984c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower_of_hanoi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/main.rs:152:23
[INFO] [stdout]     |
[INFO] [stdout] 152 |     fn bench_30_rings(b: &mut Bencher) {
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ring`
[INFO] [stdout]   --> src/main.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     ring: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:48:20
[INFO] [stdout]    |
[INFO] [stdout] 48 |             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 48 -             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stdout] 48 +             panic!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers);
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.06s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "699bbc7b73cb3e9d5102676ff8364f8e42f872a8c4af1114b43f0dbf474984c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "699bbc7b73cb3e9d5102676ff8364f8e42f872a8c4af1114b43f0dbf474984c1", kill_on_drop: false }`
[INFO] [stdout] 699bbc7b73cb3e9d5102676ff8364f8e42f872a8c4af1114b43f0dbf474984c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", 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] 637ea52ec08a1a507a8d71dbeded5f8a0a45b8b5a49ad8d6a40e4d68e1d86ae7
[INFO] running `Command { std: "docker" "start" "-a" "637ea52ec08a1a507a8d71dbeded5f8a0a45b8b5a49ad8d6a40e4d68e1d86ae7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stdout] running 1 test
[INFO] [stderr]    --> src/main.rs:152:23
[INFO] [stderr]     |
[INFO] [stderr] 152 |     fn bench_30_rings(b: &mut Bencher) {
[INFO] [stderr]     |                       ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `ring`
[INFO] [stderr]   --> src/main.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     ring: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/main.rs:48:20
[INFO] [stderr]    |
[INFO] [stderr] 48 |             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stderr] help: remove the `format!(..)` macro call
[INFO] [stderr]    |
[INFO] [stderr] 48 -             panic!(format!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers));
[INFO] [stderr] 48 +             panic!("Cannot move from {:?} to {:?} with state {:?}", mv.from, mv.to, &self.towers);
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `tower_of_hanoi` (bin "tower_of_hanoi" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tower_of_hanoi-23cae48470ac4904)
[INFO] [stderr] error: test failed, to rerun pass '--bin tower_of_hanoi'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/tower_of_hanoi-23cae48470ac4904` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "637ea52ec08a1a507a8d71dbeded5f8a0a45b8b5a49ad8d6a40e4d68e1d86ae7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "637ea52ec08a1a507a8d71dbeded5f8a0a45b8b5a49ad8d6a40e4d68e1d86ae7", kill_on_drop: false }`
[INFO] [stdout] 637ea52ec08a1a507a8d71dbeded5f8a0a45b8b5a49ad8d6a40e4d68e1d86ae7