[INFO] cloning repository https://github.com/LadderTheory/euler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LadderTheory/euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c73179646f0e0041e923031344c4de4a158a5d1
[INFO] checking LadderTheory/euler against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LadderTheory/euler on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LadderTheory/euler
[INFO] finished tweaking git repo https://github.com/LadderTheory/euler
[INFO] tweaked toml for git repo https://github.com/LadderTheory/euler written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/LadderTheory/euler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43cc014b9e921c9ff2338b437edda1a285a2983a748ee7cb82a028db3600e95c
[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" "43cc014b9e921c9ff2338b437edda1a285a2983a748ee7cb82a028db3600e95c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43cc014b9e921c9ff2338b437edda1a285a2983a748ee7cb82a028db3600e95c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43cc014b9e921c9ff2338b437edda1a285a2983a748ee7cb82a028db3600e95c", kill_on_drop: false }`
[INFO] [stdout] 43cc014b9e921c9ff2338b437edda1a285a2983a748ee7cb82a028db3600e95c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] ea0e7a13178615261d99ebeed3fe5715245cebd37bd16244859f9e82740dff0d
[INFO] running `Command { std: "docker" "start" "-a" "ea0e7a13178615261d99ebeed3fe5715245cebd37bd16244859f9e82740dff0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking euler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `acc`
[INFO] [stdout]    --> src/main.rs:531:32
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_acc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:531:38
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                    ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:531:40
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `acc`
[INFO] [stdout]    --> src/main.rs:531:32
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                              ^^^ help: if this is intentional, prefix it with an underscore: `_acc`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:531:38
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                    ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:531:40
[INFO] [stdout]     |
[INFO] [stdout] 531 | ...                   .fold("".to_string(), |acc, (i,x)| {
[INFO] [stdout]     |                                                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.01s
[INFO] running `Command { std: "docker" "inspect" "ea0e7a13178615261d99ebeed3fe5715245cebd37bd16244859f9e82740dff0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea0e7a13178615261d99ebeed3fe5715245cebd37bd16244859f9e82740dff0d", kill_on_drop: false }`
[INFO] [stdout] ea0e7a13178615261d99ebeed3fe5715245cebd37bd16244859f9e82740dff0d