[INFO] cloning repository https://github.com/jschappel/Flax
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jschappel/Flax" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjschappel%2FFlax", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjschappel%2FFlax'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fd3663632a3eeab7db41d1dbec8c92d9d2952d74
[INFO] checking jschappel/Flax against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjschappel%2FFlax" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jschappel/Flax 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/jschappel/Flax
[INFO] finished tweaking git repo https://github.com/jschappel/Flax
[INFO] tweaked toml for git repo https://github.com/jschappel/Flax written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/jschappel/Flax 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] a2cdc49c66bc8d337e7f99bb7049dd80b0555200146c92179d36fad0280d281c
[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" "a2cdc49c66bc8d337e7f99bb7049dd80b0555200146c92179d36fad0280d281c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2cdc49c66bc8d337e7f99bb7049dd80b0555200146c92179d36fad0280d281c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2cdc49c66bc8d337e7f99bb7049dd80b0555200146c92179d36fad0280d281c", kill_on_drop: false }`
[INFO] [stdout] a2cdc49c66bc8d337e7f99bb7049dd80b0555200146c92179d36fad0280d281c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] e28d7b463b7e82d1152c19ba6d78666cb28f487123436ed9bda13776c774aa76
[INFO] running `Command { std: "docker" "start" "-a" "e28d7b463b7e82d1152c19ba6d78666cb28f487123436ed9bda13776c774aa76", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking basic_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/callable.rs:85:93
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn call(&self, interpreter: &mut Interpreter, args: Vec<Value>, _env: &mut Environment, line: u64) -> Result<Value, RuntimeError> {
[INFO] [stdout]    |                                                                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/callable.rs:85:93
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn call(&self, interpreter: &mut Interpreter, args: Vec<Value>, _env: &mut Environment, line: u64) -> Result<Value, RuntimeError> {
[INFO] [stdout]    |                                                                                             ^^^^ help: if this is intentional, prefix it with an underscore: `_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.87s
[INFO] running `Command { std: "docker" "inspect" "e28d7b463b7e82d1152c19ba6d78666cb28f487123436ed9bda13776c774aa76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e28d7b463b7e82d1152c19ba6d78666cb28f487123436ed9bda13776c774aa76", kill_on_drop: false }`
[INFO] [stdout] e28d7b463b7e82d1152c19ba6d78666cb28f487123436ed9bda13776c774aa76