[INFO] cloning repository https://github.com/9999years/concat_strs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/9999years/concat_strs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9999years%2Fconcat_strs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9999years%2Fconcat_strs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10e280f740476fd5b08ae0ce0381a56aba2ffc3b
[INFO] checking 9999years/concat_strs against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F9999years%2Fconcat_strs" "/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/9999years/concat_strs on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/9999years/concat_strs
[INFO] finished tweaking git repo https://github.com/9999years/concat_strs
[INFO] tweaked toml for git repo https://github.com/9999years/concat_strs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/9999years/concat_strs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ad2490e91817763cdf5bc9d7815da7aa42d86b1f04c5b446550e49d82381492
[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" "0ad2490e91817763cdf5bc9d7815da7aa42d86b1f04c5b446550e49d82381492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ad2490e91817763cdf5bc9d7815da7aa42d86b1f04c5b446550e49d82381492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ad2490e91817763cdf5bc9d7815da7aa42d86b1f04c5b446550e49d82381492", kill_on_drop: false }`
[INFO] [stdout] 0ad2490e91817763cdf5bc9d7815da7aa42d86b1f04c5b446550e49d82381492
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85807704cb371fa61c53c81c075eac4c06397338ff8eeea355061df55437c2cd
[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" "85807704cb371fa61c53c81c075eac4c06397338ff8eeea355061df55437c2cd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking oorandom v11.1.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking criterion-plot v0.4.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking serde_json v1.0.53
[INFO] [stderr]     Checking concat_strs_impl v1.0.1 (/opt/rustwide/workdir/impl)
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking concat_strs v1.0.3 (/opt/rustwide/workdir/decl)
[INFO] [stderr]     Checking criterion v0.3.2
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.47s
[INFO] running `Command { std: "docker" "inspect" "85807704cb371fa61c53c81c075eac4c06397338ff8eeea355061df55437c2cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85807704cb371fa61c53c81c075eac4c06397338ff8eeea355061df55437c2cd", kill_on_drop: false }`
[INFO] [stdout] 85807704cb371fa61c53c81c075eac4c06397338ff8eeea355061df55437c2cd