[INFO] fetching crate artifact_lib 0.2.1...
[INFO] checking artifact_lib-0.2.1 against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] extracting crate artifact_lib 0.2.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate artifact_lib 0.2.1 on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate artifact_lib 0.2.1
[INFO] finished tweaking crates.io crate artifact_lib 0.2.1
[INFO] tweaked toml for crates.io crate artifact_lib 0.2.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b5431e259fd8e612c9743f52f7b21bce9b2fd52f974a13c4665e3f28da58243
[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" "7b5431e259fd8e612c9743f52f7b21bce9b2fd52f974a13c4665e3f28da58243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b5431e259fd8e612c9743f52f7b21bce9b2fd52f974a13c4665e3f28da58243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b5431e259fd8e612c9743f52f7b21bce9b2fd52f974a13c4665e3f28da58243", kill_on_drop: false }`
[INFO] [stdout] 7b5431e259fd8e612c9743f52f7b21bce9b2fd52f974a13c4665e3f28da58243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 110b8766188ce86a5396b1d69567b66c7005adc20f8a6a7ebc199bdfc59fdf12
[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" "110b8766188ce86a5396b1d69567b66c7005adc20f8a6a7ebc199bdfc59fdf12", kill_on_drop: false }`
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]     Checking ammonia v1.2.0
[INFO] [stderr]     Checking artifact_serde v0.2.1
[INFO] [stderr]     Checking artifact_lib v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `my_deck`
[INFO] [stdout]    --> src/lib.rs:426:13
[INFO] [stdout]     |
[INFO] [stdout] 426 |         let my_deck = my_artifact.get_deck(my_adc);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_deck`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `Command { std: "docker" "inspect" "110b8766188ce86a5396b1d69567b66c7005adc20f8a6a7ebc199bdfc59fdf12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "110b8766188ce86a5396b1d69567b66c7005adc20f8a6a7ebc199bdfc59fdf12", kill_on_drop: false }`
[INFO] [stdout] 110b8766188ce86a5396b1d69567b66c7005adc20f8a6a7ebc199bdfc59fdf12