[INFO] fetching crate kurobako_core 0.1.12...
[INFO] checking kurobako_core-0.1.12 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate kurobako_core 0.1.12 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate kurobako_core 0.1.12
[INFO] finished tweaking crates.io crate kurobako_core 0.1.12
[INFO] tweaked toml for crates.io crate kurobako_core 0.1.12 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kurobako_core 0.1.12 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 75 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.14.0)
[INFO] [stderr]       Adding ordered-float v2.10.1 (available: v5.1.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding rlua v0.17.1 (available: v0.20.1)
[INFO] [stderr]       Adding sha2 v0.9.9 (available: v0.10.9)
[INFO] [stderr]       Adding trackable v0.2.24 (available: v1.3.0)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 7dc78bc37e7fea5cffad0835cc842830ce037c9a0f4745b311ab87eaa4012358
[INFO] running `Command { std: "docker" "start" "-a" "7dc78bc37e7fea5cffad0835cc842830ce037c9a0f4745b311ab87eaa4012358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7dc78bc37e7fea5cffad0835cc842830ce037c9a0f4745b311ab87eaa4012358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7dc78bc37e7fea5cffad0835cc842830ce037c9a0f4745b311ab87eaa4012358", kill_on_drop: false }`
[INFO] [stdout] 7dc78bc37e7fea5cffad0835cc842830ce037c9a0f4745b311ab87eaa4012358
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2a75271eb434b0e4b4ed13679b2daae5472ce18eee728944af89a96fc79d4599
[INFO] running `Command { std: "docker" "start" "-a" "2a75271eb434b0e4b4ed13679b2daae5472ce18eee728944af89a96fc79d4599", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]    Compiling rlua v0.17.1
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling trackable_derive v1.0.0
[INFO] [stderr]     Checking ordered-float v2.10.1
[INFO] [stderr]     Checking tempfile v3.23.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking trackable v1.3.0
[INFO] [stderr]     Checking trackable v0.2.24
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking kurobako_core v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/domain.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 | /         /// Possible choices.
[INFO] [stdout] 281 | |         choices: Vec<String>,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/embedded_script.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     /// Embedded script code.
[INFO] [stdout] 27 | |     pub script: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/embedded_script.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// Command line arguments that are passed to the script.
[INFO] [stdout] 30 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/epi/problem/external_program.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     /// The path of the external program.
[INFO] [stdout] 28 | |     pub path: PathBuf,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/external_program.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | /     /// The command line arguments that are passed to the program.
[INFO] [stdout] 31 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/embedded_script.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     /// Embedded script code.
[INFO] [stdout] 27 | |     pub script: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/embedded_script.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// Command line arguments that are passed to the script.
[INFO] [stdout] 30 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/epi/solver/external_program.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// The path of the external program.
[INFO] [stdout] 30 | |     pub path: PathBuf,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/external_program.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     /// The command line arguments that are passed to the program.
[INFO] [stdout] 33 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/domain.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 | /         /// Possible choices.
[INFO] [stdout] 281 | |         choices: Vec<String>,
[INFO] [stdout]     | |____________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/embedded_script.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     /// Embedded script code.
[INFO] [stdout] 27 | |     pub script: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/embedded_script.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// Command line arguments that are passed to the script.
[INFO] [stdout] 30 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/epi/problem/external_program.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     /// The path of the external program.
[INFO] [stdout] 28 | |     pub path: PathBuf,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/problem/external_program.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | /     /// The command line arguments that are passed to the program.
[INFO] [stdout] 31 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/embedded_script.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     /// Embedded script code.
[INFO] [stdout] 27 | |     pub script: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/embedded_script.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// Command line arguments that are passed to the script.
[INFO] [stdout] 30 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/epi/solver/external_program.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     /// The path of the external program.
[INFO] [stdout] 30 | |     pub path: PathBuf,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/epi/solver/external_program.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     /// The command line arguments that are passed to the program.
[INFO] [stdout] 33 | |     pub args: Vec<String>,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kurobako_core` (lib test) due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `kurobako_core` (lib) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "2a75271eb434b0e4b4ed13679b2daae5472ce18eee728944af89a96fc79d4599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a75271eb434b0e4b4ed13679b2daae5472ce18eee728944af89a96fc79d4599", kill_on_drop: false }`
[INFO] [stdout] 2a75271eb434b0e4b4ed13679b2daae5472ce18eee728944af89a96fc79d4599