[INFO] cloning repository https://github.com/MaciejSzybiak/first_os
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MaciejSzybiak/first_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaciejSzybiak%2Ffirst_os", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaciejSzybiak%2Ffirst_os'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b42e949907898a1336e1c8c6f8a322dcc0c9f640
[INFO] checking MaciejSzybiak/first_os against try#55b3f428b4fac6790b1e8492e0b91ff2d80aec7c for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaciejSzybiak%2Ffirst_os" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MaciejSzybiak/first_os on toolchain 55b3f428b4fac6790b1e8492e0b91ff2d80aec7c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MaciejSzybiak/first_os
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/MaciejSzybiak/first_os
[INFO] tweaked toml for git repo https://github.com/MaciejSzybiak/first_os written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/MaciejSzybiak/first_os already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpuio v0.3.0
[INFO] [stderr]   Downloaded spinning_top v0.1.1
[INFO] [stderr]   Downloaded linked_list_allocator v0.8.6
[INFO] [stderr]   Downloaded bootloader v0.9.10
[INFO] [stderr]   Downloaded bit_field v0.9.0
[INFO] [stderr]   Downloaded pc-keyboard v0.5.1
[INFO] [stderr]   Downloaded pic8259_simple v0.2.0
[INFO] [stderr]   Downloaded volatile v0.2.7
[INFO] [stderr]   Downloaded uart_16550 v0.2.8
[INFO] [stderr]   Downloaded x86_64 v0.12.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f1efdfa8dd8752c9ed2f15c2f28183b3eb363e9a55f28c68575bdee56d14c14
[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" "6f1efdfa8dd8752c9ed2f15c2f28183b3eb363e9a55f28c68575bdee56d14c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f1efdfa8dd8752c9ed2f15c2f28183b3eb363e9a55f28c68575bdee56d14c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1efdfa8dd8752c9ed2f15c2f28183b3eb363e9a55f28c68575bdee56d14c14", kill_on_drop: false }`
[INFO] [stdout] 6f1efdfa8dd8752c9ed2f15c2f28183b3eb363e9a55f28c68575bdee56d14c14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+55b3f428b4fac6790b1e8492e0b91ff2d80aec7c" "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] 1469cc97337f285521e79b283aa9d7c890a9c2d3c9e626d51ede065a8e2a054e
[INFO] running `Command { std: "docker" "start" "-a" "1469cc97337f285521e79b283aa9d7c890a9c2d3c9e626d51ede065a8e2a054e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: "/opt/rustwide/rustup-home/toolchains/55b3f428b4fac6790b1e8492e0b91ff2d80aec7c/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" "1469cc97337f285521e79b283aa9d7c890a9c2d3c9e626d51ede065a8e2a054e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1469cc97337f285521e79b283aa9d7c890a9c2d3c9e626d51ede065a8e2a054e", kill_on_drop: false }`
[INFO] [stdout] 1469cc97337f285521e79b283aa9d7c890a9c2d3c9e626d51ede065a8e2a054e