[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 try#9d63f825c0d409b0e1743a2c84b33f86965e5929 for pr-136968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNorbertBodziony%2Fmatching_engine" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NorbertBodziony/matching_engine on toolchain 9d63f825c0d409b0e1743a2c84b33f86965e5929
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "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-3-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "fetch" "--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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded priority-queue v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2b5f5a00e6ad83fa9f27fa859535e57cc7a9de5fe99a672bb5234130b4da09e
[INFO] running `Command { std: "docker" "start" "-a" "f2b5f5a00e6ad83fa9f27fa859535e57cc7a9de5fe99a672bb5234130b4da09e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2b5f5a00e6ad83fa9f27fa859535e57cc7a9de5fe99a672bb5234130b4da09e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2b5f5a00e6ad83fa9f27fa859535e57cc7a9de5fe99a672bb5234130b4da09e", kill_on_drop: false }`
[INFO] [stdout] f2b5f5a00e6ad83fa9f27fa859535e57cc7a9de5fe99a672bb5234130b4da09e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f77ca91b45b90ddf08b85600705d94e495c118ca866f6b5704e3d956401505c
[INFO] running `Command { std: "docker" "start" "-a" "1f77ca91b45b90ddf08b85600705d94e495c118ca866f6b5704e3d956401505c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[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]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[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: 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]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "1f77ca91b45b90ddf08b85600705d94e495c118ca866f6b5704e3d956401505c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f77ca91b45b90ddf08b85600705d94e495c118ca866f6b5704e3d956401505c", kill_on_drop: false }`
[INFO] [stdout] 1f77ca91b45b90ddf08b85600705d94e495c118ca866f6b5704e3d956401505c