[INFO] cloning repository https://github.com/Varunml3/v_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Varunml3/v_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVarunml3%2Fv_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVarunml3%2Fv_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2df1c23393c8125a0daf799324f236414be6f0df
[INFO] checking Varunml3/v_os against try#4a23c45c7893f1416456144e3883cc48ea91722e for pr-82322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVarunml3%2Fv_os" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Varunml3/v_os on toolchain 4a23c45c7893f1416456144e3883cc48ea91722e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Varunml3/v_os
[INFO] finished tweaking git repo https://github.com/Varunml3/v_os
[INFO] tweaked toml for git repo https://github.com/Varunml3/v_os written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Varunml3/v_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "metadata" "--no-deps" "--format-version=1", 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] a06bed1d7b5bbbc9e6e3f74c3851d8ac0ad6794f8d49cfc045c4dfdcd64fa8f8
[INFO] running `Command { std: "docker" "start" "-a" "a06bed1d7b5bbbc9e6e3f74c3851d8ac0ad6794f8d49cfc045c4dfdcd64fa8f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a06bed1d7b5bbbc9e6e3f74c3851d8ac0ad6794f8d49cfc045c4dfdcd64fa8f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a06bed1d7b5bbbc9e6e3f74c3851d8ac0ad6794f8d49cfc045c4dfdcd64fa8f8", kill_on_drop: false }`
[INFO] [stdout] a06bed1d7b5bbbc9e6e3f74c3851d8ac0ad6794f8d49cfc045c4dfdcd64fa8f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3de0fa97b07abe4d85da3f286358dd4846c5f126c3bd8e86ae2c7a0e7afff713
[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" "3de0fa97b07abe4d85da3f286358dd4846c5f126c3bd8e86ae2c7a0e7afff713", kill_on_drop: false }`
[INFO] [stderr] error: "/opt/rustwide/rustup-home/toolchains/4a23c45c7893f1416456144e3883cc48ea91722e/lib/rustlib/src/rust/Cargo.lock" does not exist, unable to build with the standard library, try:
[INFO] [stderr]         rustup component add rust-src
[INFO] running `Command { std: "docker" "inspect" "3de0fa97b07abe4d85da3f286358dd4846c5f126c3bd8e86ae2c7a0e7afff713", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3de0fa97b07abe4d85da3f286358dd4846c5f126c3bd8e86ae2c7a0e7afff713", kill_on_drop: false }`
[INFO] [stdout] 3de0fa97b07abe4d85da3f286358dd4846c5f126c3bd8e86ae2c7a0e7afff713