[INFO] cloning repository https://github.com/kotokaze/crabcan
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotokaze/crabcan" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotokaze%2Fcrabcan", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotokaze%2Fcrabcan'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 422b7dd9a397c1e7dfda4a7fb0ee625b65ab3431
[INFO] checking kotokaze/crabcan 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%2Fkotokaze%2Fcrabcan" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kotokaze/crabcan
[INFO] finished tweaking git repo https://github.com/kotokaze/crabcan
[INFO] tweaked toml for git repo https://github.com/kotokaze/crabcan written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kotokaze/crabcan 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/kotokaze/crabcan 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 711162ca664181d702e2b7289904517e9afd5e81fcd785d8578eb831e3333c0a
[INFO] running `Command { std: "docker" "start" "-a" "711162ca664181d702e2b7289904517e9afd5e81fcd785d8578eb831e3333c0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "711162ca664181d702e2b7289904517e9afd5e81fcd785d8578eb831e3333c0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "711162ca664181d702e2b7289904517e9afd5e81fcd785d8578eb831e3333c0a", kill_on_drop: false }`
[INFO] [stdout] 711162ca664181d702e2b7289904517e9afd5e81fcd785d8578eb831e3333c0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ed714e81e6e1ad811b8b1246fac37e6dd00ade4cf0124a53afc3c8212e2a90b3
[INFO] running `Command { std: "docker" "start" "-a" "ed714e81e6e1ad811b8b1246fac37e6dd00ade4cf0124a53afc3c8212e2a90b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.22.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking regex v1.6.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking crabcan v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `fd`, `uid`, and `mount_dir` are never read
[INFO] [stdout]   --> src/config.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ContainerOpts {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |   pub fd: RawFd,
[INFO] [stdout]    |       ^^
[INFO] [stdout] 14 |   pub uid: u32,
[INFO] [stdout]    |       ^^^
[INFO] [stdout] 15 |   pub mount_dir: PathBuf,
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ContainerOpts` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |   NotSupported(u8),
[INFO] [stdout]   |   ------------ ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -   NotSupported(u8),
[INFO] [stdout] 7 +   NotSupported(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |   SocketError(u8),
[INFO] [stdout]   |   ----------- ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 8 -   SocketError(u8),
[INFO] [stdout] 8 +   SocketError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |   ContainerError(u8),
[INFO] [stdout]   |   -------------- ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 9 -   ContainerError(u8),
[INFO] [stdout] 9 +   ContainerError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/errors.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |   ChildProcessError(u8),
[INFO] [stdout]    |   ----------------- ^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 10 -   ChildProcessError(u8),
[INFO] [stdout] 10 +   ChildProcessError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `send_boolean` is never used
[INFO] [stdout]   --> src/ipc.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn send_boolean(fd: RawFd, val: bool) -> Result<(), ErrCode> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recv_boolean` is never used
[INFO] [stdout]   --> src/ipc.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn recv_boolean(fd: RawFd) -> Result<bool, ErrCode> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 15 | /   #[structopt(short, long)]
[INFO] [stdout] 16 | |   pub command: String,
[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 `crabcan` (bin "crabcan") due to 1 previous error; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: fields `fd`, `uid`, and `mount_dir` are never read
[INFO] [stdout]   --> src/config.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ContainerOpts {
[INFO] [stdout]    |            ------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |   pub fd: RawFd,
[INFO] [stdout]    |       ^^
[INFO] [stdout] 14 |   pub uid: u32,
[INFO] [stdout]    |       ^^^
[INFO] [stdout] 15 |   pub mount_dir: PathBuf,
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ContainerOpts` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |   NotSupported(u8),
[INFO] [stdout]   |   ------------ ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -   NotSupported(u8),
[INFO] [stdout] 7 +   NotSupported(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |   SocketError(u8),
[INFO] [stdout]   |   ----------- ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 8 -   SocketError(u8),
[INFO] [stdout] 8 +   SocketError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/errors.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |   ContainerError(u8),
[INFO] [stdout]   |   -------------- ^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 9 -   ContainerError(u8),
[INFO] [stdout] 9 +   ContainerError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/errors.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |   ChildProcessError(u8),
[INFO] [stdout]    |   ----------------- ^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ErrCode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 10 -   ChildProcessError(u8),
[INFO] [stdout] 10 +   ChildProcessError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `send_boolean` is never used
[INFO] [stdout]   --> src/ipc.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn send_boolean(fd: RawFd, val: bool) -> Result<(), ErrCode> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recv_boolean` is never used
[INFO] [stdout]   --> src/ipc.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn recv_boolean(fd: RawFd) -> Result<bool, ErrCode> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/cli.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 15 | /   #[structopt(short, long)]
[INFO] [stdout] 16 | |   pub command: String,
[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 `crabcan` (bin "crabcan" test) due to 1 previous error; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ed714e81e6e1ad811b8b1246fac37e6dd00ade4cf0124a53afc3c8212e2a90b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed714e81e6e1ad811b8b1246fac37e6dd00ade4cf0124a53afc3c8212e2a90b3", kill_on_drop: false }`
[INFO] [stdout] ed714e81e6e1ad811b8b1246fac37e6dd00ade4cf0124a53afc3c8212e2a90b3
