[INFO] fetching crate mktoc 2.2.1...
[INFO] checking mktoc-2.2.1 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate mktoc 2.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mktoc 2.2.1 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mktoc 2.2.1
[INFO] finished tweaking crates.io crate mktoc 2.2.1
[INFO] tweaked toml for crates.io crate mktoc 2.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate mktoc 2.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "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] 32f911d8b5ed92107ad12902357757bb8c63a72c99929cf351f9f15eda3cd473
[INFO] running `Command { std: "docker" "start" "-a" "32f911d8b5ed92107ad12902357757bb8c63a72c99929cf351f9f15eda3cd473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32f911d8b5ed92107ad12902357757bb8c63a72c99929cf351f9f15eda3cd473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32f911d8b5ed92107ad12902357757bb8c63a72c99929cf351f9f15eda3cd473", kill_on_drop: false }`
[INFO] [stdout] 32f911d8b5ed92107ad12902357757bb8c63a72c99929cf351f9f15eda3cd473
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e528b945b4229a0fa33586e1e0b531d055fa735f07b3c93461962ea4e4c78f09
[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" "e528b945b4229a0fa33586e1e0b531d055fa735f07b3c93461962ea4e4c78f09", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking aho-corasick v0.7.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-error v0.4.9
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.9
[INFO] [stderr]    Compiling structopt-derive v0.4.2
[INFO] [stderr]     Checking structopt v0.3.9
[INFO] [stderr]     Checking mktoc v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.73s
[INFO] running `Command { std: "docker" "inspect" "e528b945b4229a0fa33586e1e0b531d055fa735f07b3c93461962ea4e4c78f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e528b945b4229a0fa33586e1e0b531d055fa735f07b3c93461962ea4e4c78f09", kill_on_drop: false }`
[INFO] [stdout] e528b945b4229a0fa33586e1e0b531d055fa735f07b3c93461962ea4e4c78f09