[INFO] cloning repository https://github.com/taraka/rusty-containers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taraka/rusty-containers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaraka%2Frusty-containers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaraka%2Frusty-containers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c467b5ac39b6a8cc8512b994dc942610aafc7e07
[INFO] testing taraka/rusty-containers against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaraka%2Frusty-containers" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/taraka/rusty-containers
[INFO] finished tweaking git repo https://github.com/taraka/rusty-containers
[INFO] tweaked toml for git repo https://github.com/taraka/rusty-containers written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/taraka/rusty-containers on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/taraka/rusty-containers 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arraymap v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e2e0aa04915fc9e191cc9c4e98bf8c87c514417c896aef9e0d80e2497271047
[INFO] running `Command { std: "docker" "start" "-a" "7e2e0aa04915fc9e191cc9c4e98bf8c87c514417c896aef9e0d80e2497271047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e2e0aa04915fc9e191cc9c4e98bf8c87c514417c896aef9e0d80e2497271047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2e0aa04915fc9e191cc9c4e98bf8c87c514417c896aef9e0d80e2497271047", kill_on_drop: false }`
[INFO] [stdout] 7e2e0aa04915fc9e191cc9c4e98bf8c87c514417c896aef9e0d80e2497271047
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77dbb69dcc014793688fd31c2097cffe60aaa4e0c497656024f8f7547f78f544
[INFO] running `Command { std: "docker" "start" "-a" "77dbb69dcc014793688fd31c2097cffe60aaa4e0c497656024f8f7547f78f544", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling arraymap v0.1.1
[INFO] [stderr]    Compiling rusty-containers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `gethostname`
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nix::unistd::{execv, gethostname, sethostname, getpid, getppid, chroot, mkdir, chdir, Pid};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::from_utf8`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::str::from_utf8;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `WaitPidFlag`
[INFO] [stdout]  --> src/main.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 | use nix::sys::wait::{waitpid, WaitPidFlag, WaitStatus};
[INFO] [stdout]   |                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:29:37
[INFO] [stdout]    |
[INFO] [stdout] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:34:34
[INFO] [stdout]    |
[INFO] [stdout] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/main.rs:34:44
[INFO] [stdout]    |
[INFO] [stdout] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stdout]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 |             WaitStatus::Stopped(pid, sig) => println!("Stopped {}", sig),
[INFO] [stdout]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:38:37
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]   --> src/main.rs:38:42
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:38:47
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:40:39
[INFO] [stdout]    |
[INFO] [stdout] 40 |             WaitStatus::PtraceSyscall(pid) => println!("PtraceSyscall"),
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:42:35
[INFO] [stdout]    |
[INFO] [stdout] 42 |             WaitStatus::Continued(pid)=> println!("Continue"),
[INFO] [stdout]    |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let _ = mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     chroot(&container_base[..]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let _ = chroot(&container_base[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     chdir("/");
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = chdir("/");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.73s
[INFO] running `Command { std: "docker" "inspect" "77dbb69dcc014793688fd31c2097cffe60aaa4e0c497656024f8f7547f78f544", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77dbb69dcc014793688fd31c2097cffe60aaa4e0c497656024f8f7547f78f544", kill_on_drop: false }`
[INFO] [stdout] 77dbb69dcc014793688fd31c2097cffe60aaa4e0c497656024f8f7547f78f544
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96f9628b4a9e51e9a2c4f114730ce40ae0f745fa38f19917381f31337682b496
[INFO] running `Command { std: "docker" "start" "-a" "96f9628b4a9e51e9a2c4f114730ce40ae0f745fa38f19917381f31337682b496", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-containers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `gethostname`
[INFO] [stdout]  --> src/main.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | use nix::unistd::{execv, gethostname, sethostname, getpid, getppid, chroot, mkdir, chdir, Pid};
[INFO] [stdout]   |                          ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::from_utf8`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::str::from_utf8;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `WaitPidFlag`
[INFO] [stdout]  --> src/main.rs:9:31
[INFO] [stdout]   |
[INFO] [stdout] 9 | use nix::sys::wait::{waitpid, WaitPidFlag, WaitStatus};
[INFO] [stdout]   |                               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:29:37
[INFO] [stdout]    |
[INFO] [stdout] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:34:34
[INFO] [stdout]    |
[INFO] [stdout] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stdout]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/main.rs:34:44
[INFO] [stdout]    |
[INFO] [stdout] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stdout]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:36:33
[INFO] [stdout]    |
[INFO] [stdout] 36 |             WaitStatus::Stopped(pid, sig) => println!("Stopped {}", sig),
[INFO] [stdout]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:38:37
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]   --> src/main.rs:38:42
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:38:47
[INFO] [stdout]    |
[INFO] [stdout] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stdout]    |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:40:39
[INFO] [stdout]    |
[INFO] [stdout] 40 |             WaitStatus::PtraceSyscall(pid) => println!("PtraceSyscall"),
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pid`
[INFO] [stdout]   --> src/main.rs:42:35
[INFO] [stdout]    |
[INFO] [stdout] 42 |             WaitStatus::Continued(pid)=> println!("Continue"),
[INFO] [stdout]    |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let _ = mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     chroot(&container_base[..]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let _ = chroot(&container_base[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     chdir("/");
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = chdir("/");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "96f9628b4a9e51e9a2c4f114730ce40ae0f745fa38f19917381f31337682b496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96f9628b4a9e51e9a2c4f114730ce40ae0f745fa38f19917381f31337682b496", kill_on_drop: false }`
[INFO] [stdout] 96f9628b4a9e51e9a2c4f114730ce40ae0f745fa38f19917381f31337682b496
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1c9f242414b113431990ff2dcf37dc298a23fda3849281c91f060fc62e71adcf
[INFO] running `Command { std: "docker" "start" "-a" "1c9f242414b113431990ff2dcf37dc298a23fda3849281c91f060fc62e71adcf", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `gethostname`
[INFO] [stderr]  --> src/main.rs:1:26
[INFO] [stderr]   |
[INFO] [stderr] 1 | use nix::unistd::{execv, gethostname, sethostname, getpid, getppid, chroot, mkdir, chdir, Pid};
[INFO] [stderr]   |                          ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str::from_utf8`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::str::from_utf8;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `WaitPidFlag`
[INFO] [stderr]  --> src/main.rs:9:31
[INFO] [stderr]   |
[INFO] [stderr] 9 | use nix::sys::wait::{waitpid, WaitPidFlag, WaitStatus};
[INFO] [stderr]   |                               ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:29:32
[INFO] [stderr]    |
[INFO] [stderr] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stderr]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:29:37
[INFO] [stderr]    |
[INFO] [stderr] 29 |             WaitStatus::Exited(pid, i) => {
[INFO] [stderr]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:34:34
[INFO] [stderr]    |
[INFO] [stderr] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stderr]    |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:34:44
[INFO] [stderr]    |
[INFO] [stderr] 34 |             WaitStatus::Signaled(pid, sig, b) => println!("Signaled, {}", sig),
[INFO] [stderr]    |                                            ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:36:33
[INFO] [stderr]    |
[INFO] [stderr] 36 |             WaitStatus::Stopped(pid, sig) => println!("Stopped {}", sig),
[INFO] [stderr]    |                                 ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:38:37
[INFO] [stderr]    |
[INFO] [stderr] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stderr]    |                                     ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sig`
[INFO] [stderr]   --> src/main.rs:38:42
[INFO] [stderr]    |
[INFO] [stderr] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stderr]    |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/main.rs:38:47
[INFO] [stderr]    |
[INFO] [stderr] 38 |             WaitStatus::PtraceEvent(pid, sig, i) => println!("PtraceEvent"),
[INFO] [stderr]    |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:40:39
[INFO] [stderr]    |
[INFO] [stderr] 40 |             WaitStatus::PtraceSyscall(pid) => println!("PtraceSyscall"),
[INFO] [stderr]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pid`
[INFO] [stderr]   --> src/main.rs:42:35
[INFO] [stderr]    |
[INFO] [stderr] 42 |             WaitStatus::Continued(pid)=> println!("Continue"),
[INFO] [stderr]    |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_pid`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let _ = mkdir::<str>(&container_base[..], stat::Mode::S_IRWXU | stat::Mode::S_IRGRP | stat::Mode::S_IXGRP);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     chroot(&container_base[..]);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let _ = chroot(&container_base[..]);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     chdir("/");
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let _ = chdir("/");
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty-containers` (bin "rusty-containers" test) generated 17 warnings (run `cargo fix --bin "rusty-containers" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rusty_containers-f4e129b1815206ac)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1c9f242414b113431990ff2dcf37dc298a23fda3849281c91f060fc62e71adcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c9f242414b113431990ff2dcf37dc298a23fda3849281c91f060fc62e71adcf", kill_on_drop: false }`
[INFO] [stdout] 1c9f242414b113431990ff2dcf37dc298a23fda3849281c91f060fc62e71adcf