[INFO] cloning repository https://github.com/grahamc/nixos-activation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grahamc/nixos-activation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrahamc%2Fnixos-activation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrahamc%2Fnixos-activation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e210e7cf077918b35430ea55ed807a8b8dc0456e
[INFO] checking grahamc/nixos-activation against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrahamc%2Fnixos-activation" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/grahamc/nixos-activation on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/grahamc/nixos-activation
[INFO] finished tweaking git repo https://github.com/grahamc/nixos-activation
[INFO] tweaked toml for git repo https://github.com/grahamc/nixos-activation written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/grahamc/nixos-activation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--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 memchr v2.1.1
[INFO] [stderr]   Downloaded aho-corasick v0.6.9
[INFO] [stderr]   Downloaded regex v1.0.6
[INFO] [stderr]   Downloaded libc v0.2.44
[INFO] [stderr]   Downloaded lazy_static v1.2.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b5911e3c9f2a7dfab0d768a8c50a4b833ae6a1f980103071908d42021b22da0
[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" "7b5911e3c9f2a7dfab0d768a8c50a4b833ae6a1f980103071908d42021b22da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b5911e3c9f2a7dfab0d768a8c50a4b833ae6a1f980103071908d42021b22da0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b5911e3c9f2a7dfab0d768a8c50a4b833ae6a1f980103071908d42021b22da0", kill_on_drop: false }`
[INFO] [stdout] 7b5911e3c9f2a7dfab0d768a8c50a4b833ae6a1f980103071908d42021b22da0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae2180e22e2831ad7e52e0de580b31f1e02a09326d804a9bb7096232f542e32e
[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" "ae2180e22e2831ad7e52e0de580b31f1e02a09326d804a9bb7096232f542e32e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking regex-syntax v0.6.3
[INFO] [stderr]     Checking memchr v2.1.1
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.0.6
[INFO] [stderr]     Checking activate v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `parse_fstab_line`
[INFO] [stdout]   --> src/fstab.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn parse_fstab_line<'a>(fstab: &'a str) -> Option<FSTabEntry<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_fstab`
[INFO] [stdout]   --> src/fstab.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn parse_fstab<'a, T: Iterator<Item = &'a str>>(fstab_lines: T) -> FSTabFile<'a> {
[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 7.56s
[INFO] running `Command { std: "docker" "inspect" "ae2180e22e2831ad7e52e0de580b31f1e02a09326d804a9bb7096232f542e32e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae2180e22e2831ad7e52e0de580b31f1e02a09326d804a9bb7096232f542e32e", kill_on_drop: false }`
[INFO] [stdout] ae2180e22e2831ad7e52e0de580b31f1e02a09326d804a9bb7096232f542e32e