[INFO] fetching crate crucible 0.0.0...
[INFO] checking crucible-0.0.0 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate crucible 0.0.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate crucible 0.0.0 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate crucible 0.0.0
[INFO] finished tweaking crates.io crate crucible 0.0.0
[INFO] tweaked toml for crates.io crate crucible 0.0.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e724db775d6aca668dfcab4f55e3391af6c4934ceeaf5db9aad661c82cf59ffa
[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" "e724db775d6aca668dfcab4f55e3391af6c4934ceeaf5db9aad661c82cf59ffa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e724db775d6aca668dfcab4f55e3391af6c4934ceeaf5db9aad661c82cf59ffa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e724db775d6aca668dfcab4f55e3391af6c4934ceeaf5db9aad661c82cf59ffa", kill_on_drop: false }`
[INFO] [stdout] e724db775d6aca668dfcab4f55e3391af6c4934ceeaf5db9aad661c82cf59ffa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "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] 504823864e1994790c973c36e99c194ddbd4176691fad4e81f34c13cc62650cf
[INFO] running `Command { std: "docker" "start" "-a" "504823864e1994790c973c36e99c194ddbd4176691fad4e81f34c13cc62650cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking odds v0.2.26
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking inflate v0.2.0
[INFO] [stderr]     Checking hsl v0.1.1
[INFO] [stderr]     Checking chunked_transfer v0.3.1
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking allan v0.2.4
[INFO] [stderr]     Checking mpmc v0.1.5
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking stb_truetype v0.1.2
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking arrayvec v0.3.25
[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]     Checking log v0.3.9
[INFO] [stderr]     Checking rusttype v0.1.2
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking clocksource v0.2.4
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking heatmap v0.6.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking uuid v0.1.18
[INFO] [stderr]     Checking url v0.2.38
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking png v0.7.0
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking waterfall v0.7.1
[INFO] [stderr]     Checking tiny_http v0.5.9
[INFO] [stderr]     Checking tic v0.2.4
[INFO] [stderr]     Checking crucible v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/metrics.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[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] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/metrics.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[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 19.92s
[INFO] running `Command { std: "docker" "inspect" "504823864e1994790c973c36e99c194ddbd4176691fad4e81f34c13cc62650cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "504823864e1994790c973c36e99c194ddbd4176691fad4e81f34c13cc62650cf", kill_on_drop: false }`
[INFO] [stdout] 504823864e1994790c973c36e99c194ddbd4176691fad4e81f34c13cc62650cf