[INFO] fetching crate ruban 0.1.3...
[INFO] checking ruban-0.1.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate ruban 0.1.3 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate ruban 0.1.3
[INFO] finished tweaking crates.io crate ruban 0.1.3
[INFO] tweaked toml for crates.io crate ruban 0.1.3 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ruban 0.1.3 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 crates.io crate ruban 0.1.3 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ecbd0b219db50e914cfd1986958ebff7e7dfa23980fc2a8020174c357293a2c1
[INFO] running `Command { std: "docker" "start" "-a" "ecbd0b219db50e914cfd1986958ebff7e7dfa23980fc2a8020174c357293a2c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecbd0b219db50e914cfd1986958ebff7e7dfa23980fc2a8020174c357293a2c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecbd0b219db50e914cfd1986958ebff7e7dfa23980fc2a8020174c357293a2c1", kill_on_drop: false }`
[INFO] [stdout] ecbd0b219db50e914cfd1986958ebff7e7dfa23980fc2a8020174c357293a2c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 61e908addefb6e660ae56be2c4a232c751723d7446f7cb5dca27a75bf84caf1b
[INFO] running `Command { std: "docker" "start" "-a" "61e908addefb6e660ae56be2c4a232c751723d7446f7cb5dca27a75bf84caf1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking float-cmp v0.6.0
[INFO] [stderr]     Checking predicates v1.0.4
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Checking ruban v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:24:63
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let filepath: PathBuf = [dirs::data_local_dir().unwrap(), PathBuf::from_str("ruban.json").unwrap()].iter().collect::<PathBuf>();
[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: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | /         #[structopt(default_value = "", short = "t", long = "tags")]
[INFO] [stdout] 7 | |         tags: String,
[INFO] [stdout]   | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |         description: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         status: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruban` (bin "ruban") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:24:63
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let filepath: PathBuf = [dirs::data_local_dir().unwrap(), PathBuf::from_str("ruban.json").unwrap()].iter().collect::<PathBuf>();
[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: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | /         #[structopt(default_value = "", short = "t", long = "tags")]
[INFO] [stdout] 7 | |         tags: String,
[INFO] [stdout]   | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |         description: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         status: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruban` (bin "ruban" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "61e908addefb6e660ae56be2c4a232c751723d7446f7cb5dca27a75bf84caf1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61e908addefb6e660ae56be2c4a232c751723d7446f7cb5dca27a75bf84caf1b", kill_on_drop: false }`
[INFO] [stdout] 61e908addefb6e660ae56be2c4a232c751723d7446f7cb5dca27a75bf84caf1b