[INFO] cloning repository https://github.com/dinhtap/distributed-block-device
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dinhtap/distributed-block-device" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinhtap%2Fdistributed-block-device", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinhtap%2Fdistributed-block-device'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b21380713675dd75a8673071458b47d28c359d54
[INFO] checking dinhtap/distributed-block-device against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdinhtap%2Fdistributed-block-device" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dinhtap/distributed-block-device
[INFO] finished tweaking git repo https://github.com/dinhtap/distributed-block-device
[INFO] tweaked toml for git repo https://github.com/dinhtap/distributed-block-device written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dinhtap/distributed-block-device on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dinhtap/distributed-block-device 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 508706784bd667023a6e9f5f30181eb598c9d1f9fc85f5bc013b8d9753c0613d
[INFO] running `Command { std: "docker" "start" "-a" "508706784bd667023a6e9f5f30181eb598c9d1f9fc85f5bc013b8d9753c0613d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "508706784bd667023a6e9f5f30181eb598c9d1f9fc85f5bc013b8d9753c0613d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "508706784bd667023a6e9f5f30181eb598c9d1f9fc85f5bc013b8d9753c0613d", kill_on_drop: false }`
[INFO] [stdout] 508706784bd667023a6e9f5f30181eb598c9d1f9fc85f5bc013b8d9753c0613d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8fbc9cd2922827d4851968fdc1571b9faa321e83add275ca3e2ff9585a2de40
[INFO] running `Command { std: "docker" "start" "-a" "e8fbc9cd2922827d4851968fdc1571b9faa321e83add275ca3e2ff9585a2de40", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking concurrent-queue v2.5.0
[INFO] [stderr]     Checking event-listener v5.3.1
[INFO] [stderr]     Checking event-listener-strategy v0.5.3
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking mio v1.0.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking socket2 v0.5.8
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking async-channel v2.3.1
[INFO] [stderr]    Compiling serde_derive v1.0.216
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling async-trait v0.1.83
[INFO] [stderr]     Checking tokio v1.42.0
[INFO] [stderr]     Checking serde v1.0.216
[INFO] [stderr]     Checking uuid v1.11.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking assignment-2-solution v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<GenericArray<u8, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]    --> src/lib.rs:505:42
[INFO] [stdout]     |
[INFO] [stdout] 505 |             let hmac_valid = mac.verify(&hmac_tag.try_into().unwrap()).is_ok();
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `assignment-2-solution` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<GenericArray<u8, UInt<UInt<UInt<UInt<UInt<UInt<UTerm, B1>, B0>, B0>, B0>, B0>, B0>>, Infallible>
[INFO] [stdout]    --> src/lib.rs:505:42
[INFO] [stdout]     |
[INFO] [stdout] 505 |             let hmac_valid = mac.verify(&hmac_tag.try_into().unwrap()).is_ok();
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `assignment-2-solution` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e8fbc9cd2922827d4851968fdc1571b9faa321e83add275ca3e2ff9585a2de40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8fbc9cd2922827d4851968fdc1571b9faa321e83add275ca3e2ff9585a2de40", kill_on_drop: false }`
[INFO] [stdout] e8fbc9cd2922827d4851968fdc1571b9faa321e83add275ca3e2ff9585a2de40
