[INFO] fetching crate gcmap 0.1.4...
[INFO] checking gcmap-0.1.4 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate gcmap 0.1.4 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate gcmap 0.1.4 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gcmap 0.1.4
[INFO] finished tweaking crates.io crate gcmap 0.1.4
[INFO] tweaked toml for crates.io crate gcmap 0.1.4 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "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" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--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-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 974a37dfd036b346f023c421b4e2b2184a7bec97f9d65d0e5dedf57567e0712a
[INFO] running `Command { std: "docker" "start" "-a" "974a37dfd036b346f023c421b4e2b2184a7bec97f9d65d0e5dedf57567e0712a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "974a37dfd036b346f023c421b4e2b2184a7bec97f9d65d0e5dedf57567e0712a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "974a37dfd036b346f023c421b4e2b2184a7bec97f9d65d0e5dedf57567e0712a", kill_on_drop: false }`
[INFO] [stdout] 974a37dfd036b346f023c421b4e2b2184a7bec97f9d65d0e5dedf57567e0712a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20feb53854ff4963fae3426a8eeb93c6754e93c2d3228e2a67401f1d8b44ec5a
[INFO] running `Command { std: "docker" "start" "-a" "20feb53854ff4963fae3426a8eeb93c6754e93c2d3228e2a67401f1d8b44ec5a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking gcmap v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]    --> src/lib.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 |     let (mark, _) = wm.insert(2, 8);
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]    --> src/lib.rs:251:47
[INFO] [stdout]     |
[INFO] [stdout] 251 |         let val = wm.entry(1).or_insert_with(|mark|2);
[INFO] [stdout]     |                                               ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "20feb53854ff4963fae3426a8eeb93c6754e93c2d3228e2a67401f1d8b44ec5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20feb53854ff4963fae3426a8eeb93c6754e93c2d3228e2a67401f1d8b44ec5a", kill_on_drop: false }`
[INFO] [stdout] 20feb53854ff4963fae3426a8eeb93c6754e93c2d3228e2a67401f1d8b44ec5a