[INFO] updating cached repository https://github.com/Idolf/syscall-challenge
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ec63f361e67560791d5209106eeac6ea40df8023
[INFO] checking Idolf/syscall-challenge against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIdolf%2Fsyscall-challenge" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Idolf/syscall-challenge on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Idolf/syscall-challenge
[INFO] finished tweaking git repo https://github.com/Idolf/syscall-challenge
[INFO] tweaked toml for git repo https://github.com/Idolf/syscall-challenge written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Idolf/syscall-challenge already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3996b1800418fc274e6425d2910778a2d422f4fbcc2bcb1a0903b8cd557e3cf4
[INFO] running `"docker" "start" "-a" "3996b1800418fc274e6425d2910778a2d422f4fbcc2bcb1a0903b8cd557e3cf4"`
[INFO] [stderr]     Checking libc v0.2.20
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking libc v0.2.20 (https://github.com/rust-lang/libc#bce927b3)
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nix v0.8.0 (https://github.com/Idolf/nix.git?branch=ptrace-stuff#65f0d512)
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking bincode v0.6.1
[INFO] [stderr]     Checking ipc-channel v0.6.0
[INFO] [stderr]     Checking syscall-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.08s
[INFO] running `"docker" "inspect" "3996b1800418fc274e6425d2910778a2d422f4fbcc2bcb1a0903b8cd557e3cf4"`
[INFO] running `"docker" "rm" "-f" "3996b1800418fc274e6425d2910778a2d422f4fbcc2bcb1a0903b8cd557e3cf4"`
[INFO] [stdout] 3996b1800418fc274e6425d2910778a2d422f4fbcc2bcb1a0903b8cd557e3cf4