[INFO] cloning repository https://github.com/NorbertBodziony/matching_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NorbertBodziony/matching_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorbertBodziony%2Fmatching_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorbertBodziony%2Fmatching_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8f977a91d8d0bde0ed832f22f0d976696301f063
[INFO] checking NorbertBodziony/matching_engine against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorbertBodziony%2Fmatching_engine" "/workspace/builds/worker-40/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-40/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NorbertBodziony/matching_engine on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NorbertBodziony/matching_engine
[INFO] finished tweaking git repo https://github.com/NorbertBodziony/matching_engine
[INFO] tweaked toml for git repo https://github.com/NorbertBodziony/matching_engine written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate git repo https://github.com/NorbertBodziony/matching_engine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcb725c862a5ce337d68c2d4d59e51d9123bb23f3b08400718ebfabf13eba00e
[INFO] running `Command { std: "docker" "start" "-a" "dcb725c862a5ce337d68c2d4d59e51d9123bb23f3b08400718ebfabf13eba00e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcb725c862a5ce337d68c2d4d59e51d9123bb23f3b08400718ebfabf13eba00e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcb725c862a5ce337d68c2d4d59e51d9123bb23f3b08400718ebfabf13eba00e", kill_on_drop: false }`
[INFO] [stdout] dcb725c862a5ce337d68c2d4d59e51d9123bb23f3b08400718ebfabf13eba00e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea4eb5de52a835e886da01d10a343507d6fc18e4979a7060a80e0b909eea7fa9
[INFO] running `Command { std: "docker" "start" "-a" "ea4eb5de52a835e886da01d10a343507d6fc18e4979a7060a80e0b909eea7fa9", kill_on_drop: false }`
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling priority-queue v1.0.0
[INFO] [stderr]     Checking engine v0.1.0 (/opt/rustwide/workdir/engine)
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/offer.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut should_pop: bool = false;
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/offer.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             should_pop = false;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/bid.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let mut should_pop: bool = false;
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/bid.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             should_pop = false;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/offer.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut should_pop: bool = false;
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/offer.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |             should_pop = false;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/bid.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let mut should_pop: bool = false;
[INFO] [stdout]    |                 ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `should_pop` is never read
[INFO] [stdout]   --> engine/src/bid.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             should_pop = false;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.15s
[INFO] running `Command { std: "docker" "inspect" "ea4eb5de52a835e886da01d10a343507d6fc18e4979a7060a80e0b909eea7fa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea4eb5de52a835e886da01d10a343507d6fc18e4979a7060a80e0b909eea7fa9", kill_on_drop: false }`
[INFO] [stdout] ea4eb5de52a835e886da01d10a343507d6fc18e4979a7060a80e0b909eea7fa9