[INFO] cloning repository https://github.com/Nemo157/oubliette
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nemo157/oubliette" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNemo157%2Foubliette", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNemo157%2Foubliette'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b029edc4ea17d39c16f630476fb7938d5d38c677
[INFO] checking Nemo157/oubliette 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%2FNemo157%2Foubliette" "/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/Nemo157/oubliette
[INFO] finished tweaking git repo https://github.com/Nemo157/oubliette
[INFO] tweaked toml for git repo https://github.com/Nemo157/oubliette written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Nemo157/oubliette 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/Nemo157/oubliette 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] 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] b1874ae830c68e83bd8fc06161b4ef0723b3bdfc346b0b5c3601e3e27be56e72
[INFO] running `Command { std: "docker" "start" "-a" "b1874ae830c68e83bd8fc06161b4ef0723b3bdfc346b0b5c3601e3e27be56e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1874ae830c68e83bd8fc06161b4ef0723b3bdfc346b0b5c3601e3e27be56e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1874ae830c68e83bd8fc06161b4ef0723b3bdfc346b0b5c3601e3e27be56e72", kill_on_drop: false }`
[INFO] [stdout] b1874ae830c68e83bd8fc06161b4ef0723b3bdfc346b0b5c3601e3e27be56e72
[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] 8c65ad68e8e069b20b16c958dc503f134a830d548eaf538936253dd7f4bf4ffe
[INFO] running `Command { std: "docker" "start" "-a" "8c65ad68e8e069b20b16c958dc503f134a830d548eaf538936253dd7f4bf4ffe", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling jobserver v0.1.21
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling fst v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling zstd-sys v1.4.17+zstd.1.4.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]     Checking structopt v0.3.20
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking zstd-safe v2.0.5+zstd.1.4.5
[INFO] [stderr]     Checking zstd v0.5.3+zstd.1.4.5
[INFO] [stderr]     Checking oubliette v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `header` is never read
[INFO] [stdout]   --> src/archive.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Index {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 16 |     header: Header,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Index` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking oubliette-cli v0.1.0 (/opt/rustwide/workdir/cli)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> cli/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | /         /// Directory to archive
[INFO] [stdout] 9 | |         directory: 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: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | /         /// Index file to write
[INFO] [stdout] 11 | |         index: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | /         /// Index file to read
[INFO] [stdout] 15 | |         index: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | /         /// File to read from archive
[INFO] [stdout] 17 | |         path: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oubliette-cli` (bin "oubliette") 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<String, Infallible>
[INFO] [stdout]  --> cli/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 | /         /// Directory to archive
[INFO] [stdout] 9 | |         directory: 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: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | /         /// Index file to write
[INFO] [stdout] 11 | |         index: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | /         /// Index file to read
[INFO] [stdout] 15 | |         index: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | /         /// File to read from archive
[INFO] [stdout] 17 | |         path: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `header` is never read
[INFO] [stdout]   --> src/archive.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Index {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 16 |     header: Header,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Index` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `oubliette-cli` (bin "oubliette" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "8c65ad68e8e069b20b16c958dc503f134a830d548eaf538936253dd7f4bf4ffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c65ad68e8e069b20b16c958dc503f134a830d548eaf538936253dd7f4bf4ffe", kill_on_drop: false }`
[INFO] [stdout] 8c65ad68e8e069b20b16c958dc503f134a830d548eaf538936253dd7f4bf4ffe