[INFO] cloning repository https://github.com/taraka/rus-linux
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taraka/rus-linux" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaraka%2Frus-linux", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaraka%2Frus-linux'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c710642ae749fe1a437c3ac49058ea42429713b4
[INFO] checking taraka/rus-linux 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%2Ftaraka%2Frus-linux" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/taraka/rus-linux
[INFO] finished tweaking git repo https://github.com/taraka/rus-linux
[INFO] tweaked toml for git repo https://github.com/taraka/rus-linux written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/taraka/rus-linux 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/taraka/rus-linux 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] de61e519cfb663cdb2efb41f3a891fc6642e71f20763f1a6f01d99f2b7c01f0b
[INFO] running `Command { std: "docker" "start" "-a" "de61e519cfb663cdb2efb41f3a891fc6642e71f20763f1a6f01d99f2b7c01f0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de61e519cfb663cdb2efb41f3a891fc6642e71f20763f1a6f01d99f2b7c01f0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de61e519cfb663cdb2efb41f3a891fc6642e71f20763f1a6f01d99f2b7c01f0b", kill_on_drop: false }`
[INFO] [stdout] de61e519cfb663cdb2efb41f3a891fc6642e71f20763f1a6f01d99f2b7c01f0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 12e42f32521bfc60053cf50cb93f98b16ba6093ee8867b7107c406fcd2c902fb
[INFO] running `Command { std: "docker" "start" "-a" "12e42f32521bfc60053cf50cb93f98b16ba6093ee8867b7107c406fcd2c902fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.0
[INFO] [stderr]     Checking clap v3.1.0
[INFO] [stderr]     Checking rust-user-space v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/sh.rs:129:38
[INFO] [stdout]     |
[INFO] [stdout] 129 |               Ok(ForkResult::Child) => {
[INFO] [stdout]     |  ______________________________________^
[INFO] [stdout] 130 | |                 execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]     | |                 ---------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 131 | |             }
[INFO] [stdout]     | |_____________^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/sh.rs:130:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/sh.rs:129:38
[INFO] [stdout]     |
[INFO] [stdout] 129 |               Ok(ForkResult::Child) => {
[INFO] [stdout]     |  ______________________________________^
[INFO] [stdout] 130 | |                 execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]     | |                 ---------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 131 | |             }
[INFO] [stdout]     | |_____________^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/sh.rs:130:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/ls.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     paths: 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] [stderr] error: could not compile `rust-user-space` (bin "ls") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/init.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |   fn run_sh() {
[INFO] [stdout]    |  _____________^
[INFO] [stdout] 20 | |     let path_c = CString::new("/bin/sh").unwrap();
[INFO] [stdout] 21 | |     let argv_c: Vec<CString> = vec![path_c.clone()];
[INFO] [stdout] 22 | |     let env_c: Vec<CString> = vec![];
[INFO] [stdout] 23 | |
[INFO] [stdout] 24 | |     execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]    | |     ---------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 25 | | }
[INFO] [stdout]    | |_^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]   --> src/init.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/init.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |   fn run_sh() {
[INFO] [stdout]    |  _____________^
[INFO] [stdout] 20 | |     let path_c = CString::new("/bin/sh").unwrap();
[INFO] [stdout] 21 | |     let argv_c: Vec<CString> = vec![path_c.clone()];
[INFO] [stdout] 22 | |     let env_c: Vec<CString> = vec![];
[INFO] [stdout] 23 | |
[INFO] [stdout] 24 | |     execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]    | |     ---------------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout] 25 | | }
[INFO] [stdout]    | |_^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]   --> src/init.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     execve(&path_c, &argv_c[..], &env_c[..]).expect("evecve failed");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cat.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     paths: 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: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/ls.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     paths: 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] [stderr] error: could not compile `rust-user-space` (bin "cat" test) due to 1 previous error
[INFO] [stderr] error: could not compile `rust-user-space` (bin "ls" test) due to 1 previous error
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cat.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     paths: 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] [stderr] error: could not compile `rust-user-space` (bin "cat") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "12e42f32521bfc60053cf50cb93f98b16ba6093ee8867b7107c406fcd2c902fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e42f32521bfc60053cf50cb93f98b16ba6093ee8867b7107c406fcd2c902fb", kill_on_drop: false }`
[INFO] [stdout] 12e42f32521bfc60053cf50cb93f98b16ba6093ee8867b7107c406fcd2c902fb
