[INFO] fetching crate slacs-core 0.0.0...
[INFO] checking slacs-core-0.0.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate slacs-core 0.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate slacs-core 0.0.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slacs-core 0.0.0
[INFO] finished tweaking crates.io crate slacs-core 0.0.0
[INFO] tweaked toml for crates.io crate slacs-core 0.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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] 5e4751e6ad686e95b159f3e956ed7af1a147e331a42a38777eedf692bf3bcbd8
[INFO] running `Command { std: "docker" "start" "-a" "5e4751e6ad686e95b159f3e956ed7af1a147e331a42a38777eedf692bf3bcbd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e4751e6ad686e95b159f3e956ed7af1a147e331a42a38777eedf692bf3bcbd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e4751e6ad686e95b159f3e956ed7af1a147e331a42a38777eedf692bf3bcbd8", kill_on_drop: false }`
[INFO] [stdout] 5e4751e6ad686e95b159f3e956ed7af1a147e331a42a38777eedf692bf3bcbd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0117621b54adf77c26d757fcdae45cc04540873a61156a92f121ebcf0074554
[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" "e0117621b54adf77c26d757fcdae45cc04540873a61156a92f121ebcf0074554", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.85
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking itoa v0.1.1
[INFO] [stderr]     Checking serde v0.7.15
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking dtoa v0.2.2
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]     Checking bytecount v0.1.7
[INFO] [stderr]     Checking xi-unicode v0.0.1
[INFO] [stderr]     Checking gapbuffer v0.1.1
[INFO] [stderr]     Checking xi-rope v0.1.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde_json v0.7.4
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking error-chain v0.2.2
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking slog v0.7.0
[INFO] [stderr]     Checking slog-serde v0.7.0
[INFO] [stderr]     Checking slog-term v0.7.0
[INFO] [stderr]     Checking slog-json v0.7.0
[INFO] [stderr]     Checking slacs-core v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/slacs/marks.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new() -> MarkPosition {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cursor`
[INFO] [stdout]   --> src/slacs/marks.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Cursor(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DisplayMark`
[INFO] [stdout]   --> src/slacs/marks.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     DisplayMark(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/slacs/marks.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn new() -> MarkPosition {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cursor`
[INFO] [stdout]   --> src/slacs/marks.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Cursor(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DisplayMark`
[INFO] [stdout]   --> src/slacs/marks.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     DisplayMark(usize),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.93s
[INFO] running `Command { std: "docker" "inspect" "e0117621b54adf77c26d757fcdae45cc04540873a61156a92f121ebcf0074554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0117621b54adf77c26d757fcdae45cc04540873a61156a92f121ebcf0074554", kill_on_drop: false }`
[INFO] [stdout] e0117621b54adf77c26d757fcdae45cc04540873a61156a92f121ebcf0074554