[INFO] cloning repository https://github.com/sirscratchalot/rustwordladder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sirscratchalot/rustwordladder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6721e0c8e9ffd60ebade71f4b719d704c721d94
[INFO] testing sirscratchalot/rustwordladder against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsirscratchalot%2Frustwordladder" "/workspace/builds/worker-74/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-74/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sirscratchalot/rustwordladder on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sirscratchalot/rustwordladder
[INFO] finished tweaking git repo https://github.com/sirscratchalot/rustwordladder
[INFO] tweaked toml for git repo https://github.com/sirscratchalot/rustwordladder written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate git repo https://github.com/sirscratchalot/rustwordladder already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e9a057e642b9147b05de8a6edde8d1b7367689989e8970f2ead65f55592bf4a
[INFO] running `Command { std: "docker" "start" "-a" "1e9a057e642b9147b05de8a6edde8d1b7367689989e8970f2ead65f55592bf4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e9a057e642b9147b05de8a6edde8d1b7367689989e8970f2ead65f55592bf4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e9a057e642b9147b05de8a6edde8d1b7367689989e8970f2ead65f55592bf4a", kill_on_drop: false }`
[INFO] [stdout] 1e9a057e642b9147b05de8a6edde8d1b7367689989e8970f2ead65f55592bf4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c8ecde2559bc0f200f2f83ec04d49edb5bc293bc88683cd6e1776377e0c17eb
[INFO] running `Command { std: "docker" "start" "-a" "5c8ecde2559bc0f200f2f83ec04d49edb5bc293bc88683cd6e1776377e0c17eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:36:100
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/graph/mod.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for mut node in self.nodes.iter_mut() {
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "5c8ecde2559bc0f200f2f83ec04d49edb5bc293bc88683cd6e1776377e0c17eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c8ecde2559bc0f200f2f83ec04d49edb5bc293bc88683cd6e1776377e0c17eb", kill_on_drop: false }`
[INFO] [stdout] 5c8ecde2559bc0f200f2f83ec04d49edb5bc293bc88683cd6e1776377e0c17eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6444549b23c6b9b1a129516ddc3350deb83a5e01447d203738c66b762225a245
[INFO] running `Command { std: "docker" "start" "-a" "6444549b23c6b9b1a129516ddc3350deb83a5e01447d203738c66b762225a245", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling wordladder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:36:100
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stdout]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]    --> src/graph/mod.rs:198:12
[INFO] [stdout]     |
[INFO] [stdout] 198 |     for (i,node) in graph.nodes.iter().enumerate() {
[INFO] [stdout]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/graph/mod.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |         for mut node in self.nodes.iter_mut() {
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.26s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/wordladder-aacac03a23245379)
[INFO] running `Command { std: "docker" "inspect" "6444549b23c6b9b1a129516ddc3350deb83a5e01447d203738c66b762225a245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6444549b23c6b9b1a129516ddc3350deb83a5e01447d203738c66b762225a245", kill_on_drop: false }`
[INFO] [stdout] 6444549b23c6b9b1a129516ddc3350deb83a5e01447d203738c66b762225a245
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 440be885e4d0c31081d165340fac255530c74eb013e93c43377583e8e3aa323c
[INFO] running `Command { std: "docker" "start" "-a" "440be885e4d0c31081d165340fac255530c74eb013e93c43377583e8e3aa323c", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/main.rs:36:100
[INFO] [stderr]    |
[INFO] [stderr] 36 |         Err(why_man_why) => panic!("I just couldn't do it. I'm sorry. {} {}",file_path,why_man_why.description()),
[INFO] [stderr]    |                                                                                                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]    --> src/graph/mod.rs:198:12
[INFO] [stderr]     |
[INFO] [stderr] 198 |     for (i,node) in graph.nodes.iter().enumerate() {
[INFO] [stderr]     |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph/mod.rs:44:13
[INFO] [stderr]    |
[INFO] [stderr] 44 |         for mut node in self.nodes.iter_mut() {
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `wordladder` (bin "wordladder" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/wordladder-aacac03a23245379)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test graph::tests::test_circular ... ok
[INFO] [stdout] test graph::tests::test_longest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "440be885e4d0c31081d165340fac255530c74eb013e93c43377583e8e3aa323c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "440be885e4d0c31081d165340fac255530c74eb013e93c43377583e8e3aa323c", kill_on_drop: false }`
[INFO] [stdout] 440be885e4d0c31081d165340fac255530c74eb013e93c43377583e8e3aa323c