[INFO] cloning repository https://github.com/jiegec/classroom-helper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiegec/classroom-helper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiegec%2Fclassroom-helper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiegec%2Fclassroom-helper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b235b37d3c59cb62283a3c5b1891657490e254d7
[INFO] checking jiegec/classroom-helper against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiegec%2Fclassroom-helper" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jiegec/classroom-helper on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jiegec/classroom-helper
[INFO] finished tweaking git repo https://github.com/jiegec/classroom-helper
[INFO] tweaked toml for git repo https://github.com/jiegec/classroom-helper written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jiegec/classroom-helper already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde-hjson v0.8.2
[INFO] [stderr]   Downloaded serde_test v0.8.23
[INFO] [stderr]   Downloaded rust-ini v0.13.0
[INFO] [stderr]   Downloaded config v0.9.3
[INFO] [stderr]   Downloaded linked-hash-map v0.3.0
[INFO] [stderr]   Downloaded bstr v0.2.1
[INFO] [stderr]   Downloaded regex-automata v0.1.7
[INFO] [stderr]   Downloaded tui v0.10.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c23c817c15c5cf65b8637ffefbf0db500f1518ad0f728ae4448cf2a58eb203b2
[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" "c23c817c15c5cf65b8637ffefbf0db500f1518ad0f728ae4448cf2a58eb203b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c23c817c15c5cf65b8637ffefbf0db500f1518ad0f728ae4448cf2a58eb203b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c23c817c15c5cf65b8637ffefbf0db500f1518ad0f728ae4448cf2a58eb203b2", kill_on_drop: false }`
[INFO] [stdout] c23c817c15c5cf65b8637ffefbf0db500f1518ad0f728ae4448cf2a58eb203b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb3ba4f5f79ba60e3fd596e927cbd9e4a2206abb11a905f6bbe812f1ecccc658
[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" "fb3ba4f5f79ba60e3fd596e927cbd9e4a2206abb11a905f6bbe812f1ecccc658", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking fs_extra v1.1.0
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking regex-automata v0.1.7
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking tui v0.10.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking regex v1.1.7
[INFO] [stderr]     Checking serde-hjson v0.8.2
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking bstr v0.2.1
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking config v0.9.3
[INFO] [stderr]     Checking classroom-helper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.53s
[INFO] running `Command { std: "docker" "inspect" "fb3ba4f5f79ba60e3fd596e927cbd9e4a2206abb11a905f6bbe812f1ecccc658", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb3ba4f5f79ba60e3fd596e927cbd9e4a2206abb11a905f6bbe812f1ecccc658", kill_on_drop: false }`
[INFO] [stdout] fb3ba4f5f79ba60e3fd596e927cbd9e4a2206abb11a905f6bbe812f1ecccc658