[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 try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLadderTheory%2Feuler" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LadderTheory/euler on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "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-12/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" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.4.0
[INFO] [stderr]   Downloaded num-rational v0.4.0
[INFO] [stderr]   Downloaded num-bigint v0.4.0
[INFO] [stderr]   Downloaded num v0.4.0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 099dd690a9ffb0241b6b24390382e1b68f2c54e6f4ba6daec9cd01a400a67716
[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" "099dd690a9ffb0241b6b24390382e1b68f2c54e6f4ba6daec9cd01a400a67716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "099dd690a9ffb0241b6b24390382e1b68f2c54e6f4ba6daec9cd01a400a67716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "099dd690a9ffb0241b6b24390382e1b68f2c54e6f4ba6daec9cd01a400a67716", kill_on_drop: false }`
[INFO] [stdout] 099dd690a9ffb0241b6b24390382e1b68f2c54e6f4ba6daec9cd01a400a67716
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c59cdfcb066e66a71b0cff056bcb7fdb7503fe794816abb9285c801a77e8f46
[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" "4c59cdfcb066e66a71b0cff056bcb7fdb7503fe794816abb9285c801a77e8f46", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking termcolor v1.1.2
[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 5.99s
[INFO] running `Command { std: "docker" "inspect" "4c59cdfcb066e66a71b0cff056bcb7fdb7503fe794816abb9285c801a77e8f46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c59cdfcb066e66a71b0cff056bcb7fdb7503fe794816abb9285c801a77e8f46", kill_on_drop: false }`
[INFO] [stdout] 4c59cdfcb066e66a71b0cff056bcb7fdb7503fe794816abb9285c801a77e8f46