[INFO] fetching crate stratum-types 0.9.24...
[INFO] checking stratum-types-0.9.24 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate stratum-types 0.9.24 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate stratum-types 0.9.24 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stratum-types 0.9.24
[INFO] finished tweaking crates.io crate stratum-types 0.9.24
[INFO] tweaked toml for crates.io crate stratum-types 0.9.24 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v0.8.1
[INFO] [stderr]   Downloaded serde_tuple v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "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] 84a2344fec2409db33538feacc83b7dc0a78bf78dcd70657dd3c2754fdb4da0c
[INFO] running `Command { std: "docker" "start" "-a" "84a2344fec2409db33538feacc83b7dc0a78bf78dcd70657dd3c2754fdb4da0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84a2344fec2409db33538feacc83b7dc0a78bf78dcd70657dd3c2754fdb4da0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84a2344fec2409db33538feacc83b7dc0a78bf78dcd70657dd3c2754fdb4da0c", kill_on_drop: false }`
[INFO] [stdout] 84a2344fec2409db33538feacc83b7dc0a78bf78dcd70657dd3c2754fdb4da0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] fcf6982b8a4756f9c208f6e9cb81f088950068f2758e51be1a43252346a1c654
[INFO] running `Command { std: "docker" "start" "-a" "fcf6982b8a4756f9c208f6e9cb81f088950068f2758e51be1a43252346a1c654", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]    Compiling serde_tuple v0.4.0
[INFO] [stderr]     Checking stratum-types v0.9.24 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SeqAccess`
[INFO] [stdout]   --> src/lib.rs:11:34
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::de::{self, MapAccess, SeqAccess, Visitor};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SeqAccess`
[INFO] [stdout]   --> src/lib.rs:11:34
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde::de::{self, MapAccess, SeqAccess, Visitor};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "fcf6982b8a4756f9c208f6e9cb81f088950068f2758e51be1a43252346a1c654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcf6982b8a4756f9c208f6e9cb81f088950068f2758e51be1a43252346a1c654", kill_on_drop: false }`
[INFO] [stdout] fcf6982b8a4756f9c208f6e9cb81f088950068f2758e51be1a43252346a1c654