[INFO] cloning repository https://github.com/ItayGarin/sym-or-num
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ItayGarin/sym-or-num" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItayGarin%2Fsym-or-num", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItayGarin%2Fsym-or-num'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 963e6163eabbef086d0e74b62b12c87e8989cfc3
[INFO] checking ItayGarin/sym-or-num against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItayGarin%2Fsym-or-num" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ItayGarin/sym-or-num on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ItayGarin/sym-or-num
[INFO] finished tweaking git repo https://github.com/ItayGarin/sym-or-num
[INFO] tweaked toml for git repo https://github.com/ItayGarin/sym-or-num written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ItayGarin/sym-or-num already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f63cbf2fd03152c3254a150918b93359ec89b6616a8f4f5853f4c867cd853330
[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" "f63cbf2fd03152c3254a150918b93359ec89b6616a8f4f5853f4c867cd853330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f63cbf2fd03152c3254a150918b93359ec89b6616a8f4f5853f4c867cd853330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f63cbf2fd03152c3254a150918b93359ec89b6616a8f4f5853f4c867cd853330", kill_on_drop: false }`
[INFO] [stdout] f63cbf2fd03152c3254a150918b93359ec89b6616a8f4f5853f4c867cd853330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7abdeff24cab437625a50751e1e6eb9ad2d5698f77f303e25c3b8ed139bc4f2
[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" "e7abdeff24cab437625a50751e1e6eb9ad2d5698f77f303e25c3b8ed139bc4f2", kill_on_drop: false }`
[INFO] [stderr]     Checking event-listener v2.3.0
[INFO] [stderr]     Checking concurrent-queue v1.2.0
[INFO] [stderr]     Checking futures-lite v0.1.10
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking async-channel v1.4.0
[INFO] [stderr]     Checking blocking v0.4.7
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking async-std v1.6.2
[INFO] [stderr]     Checking sym-or-num v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `filter_regex`
[INFO] [stdout]   --> src/freq.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn filter_regex(mut self, regex: Regex) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_freq`
[INFO] [stdout]   --> src/freq.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn get_freq(input: &str) -> FreqMap {
[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 18.93s
[INFO] running `Command { std: "docker" "inspect" "e7abdeff24cab437625a50751e1e6eb9ad2d5698f77f303e25c3b8ed139bc4f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7abdeff24cab437625a50751e1e6eb9ad2d5698f77f303e25c3b8ed139bc4f2", kill_on_drop: false }`
[INFO] [stdout] e7abdeff24cab437625a50751e1e6eb9ad2d5698f77f303e25c3b8ed139bc4f2