[INFO] cloning repository https://github.com/remram44/reprozip-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/remram44/reprozip-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fremram44%2Freprozip-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fremram44%2Freprozip-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 994b9b8c83f4b6acf2df5bbcc8ab945868167181
[INFO] testing remram44/reprozip-rs against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fremram44%2Freprozip-rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/remram44/reprozip-rs on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/remram44/reprozip-rs
[INFO] finished tweaking git repo https://github.com/remram44/reprozip-rs
[INFO] tweaked toml for git repo https://github.com/remram44/reprozip-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/remram44/reprozip-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded isatty v0.1.9
[INFO] [stderr]   Downloaded crossbeam v0.2.12
[INFO] [stderr]   Downloaded slog-stdlog v3.0.2
[INFO] [stderr]   Downloaded slog-scope v4.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e99ca104e8b328bb22c4ac75e80f80e7bf2daaaa1cf4e5284de72a4a040d9cac
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e99ca104e8b328bb22c4ac75e80f80e7bf2daaaa1cf4e5284de72a4a040d9cac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e99ca104e8b328bb22c4ac75e80f80e7bf2daaaa1cf4e5284de72a4a040d9cac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e99ca104e8b328bb22c4ac75e80f80e7bf2daaaa1cf4e5284de72a4a040d9cac", kill_on_drop: false }`
[INFO] [stdout] e99ca104e8b328bb22c4ac75e80f80e7bf2daaaa1cf4e5284de72a4a040d9cac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d44f9e61d38faa3741f8c2245f726fca5077d8b599c89f0d20a0f62ecd3bf450
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d44f9e61d38faa3741f8c2245f726fca5077d8b599c89f0d20a0f62ecd3bf450", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling isatty v0.1.9
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling slog-scope v4.0.1
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling slog-stdlog v3.0.2
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling slog-term v2.4.0
[INFO] [stderr]    Compiling reprozip v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/lib.rs:329:52
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]    --> src/lib.rs:329:57
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/database.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         path: D,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tid`
[INFO] [stdout]   --> src/lib.rs:70:15
[INFO] [stdout]    |
[INFO] [stdout] 70 |     Unknown { tid: Pid },
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pid`
[INFO] [stdout]    --> src/lib.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn get_pid(&self, pid: Pid) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier`
[INFO] [stdout]    --> src/lib.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn get_identifier(&self, id: ProcessId) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier_mut`
[INFO] [stdout]    --> src/lib.rs:182:8
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn get_identifier_mut(&mut self, id: ProcessId) -> &mut Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.00s
[INFO] running `Command { std: "docker" "inspect" "d44f9e61d38faa3741f8c2245f726fca5077d8b599c89f0d20a0f62ecd3bf450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d44f9e61d38faa3741f8c2245f726fca5077d8b599c89f0d20a0f62ecd3bf450", kill_on_drop: false }`
[INFO] [stdout] d44f9e61d38faa3741f8c2245f726fca5077d8b599c89f0d20a0f62ecd3bf450
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3aa22b21e666e214e3da184a948a54d03ecbb897b4c28e259f5e58e97054d2a2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3aa22b21e666e214e3da184a948a54d03ecbb897b4c28e259f5e58e97054d2a2", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/lib.rs:329:52
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]    --> src/lib.rs:329:57
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/database.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         path: D,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tid`
[INFO] [stdout]   --> src/lib.rs:70:15
[INFO] [stdout]    |
[INFO] [stdout] 70 |     Unknown { tid: Pid },
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pid`
[INFO] [stdout]    --> src/lib.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn get_pid(&self, pid: Pid) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier`
[INFO] [stdout]    --> src/lib.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn get_identifier(&self, id: ProcessId) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier_mut`
[INFO] [stdout]    --> src/lib.rs:182:8
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn get_identifier_mut(&mut self, id: ProcessId) -> &mut Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling reprozip v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `sig`
[INFO] [stdout]    --> src/lib.rs:329:52
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]    --> src/lib.rs:329:57
[INFO] [stdout]     |
[INFO] [stdout] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/database.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         path: D,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tid`
[INFO] [stdout]   --> src/lib.rs:70:15
[INFO] [stdout]    |
[INFO] [stdout] 70 |     Unknown { tid: Pid },
[INFO] [stdout]    |               ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pid`
[INFO] [stdout]    --> src/lib.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn get_pid(&self, pid: Pid) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier`
[INFO] [stdout]    --> src/lib.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn get_identifier(&self, id: ProcessId) -> &Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_identifier_mut`
[INFO] [stdout]    --> src/lib.rs:182:8
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn get_identifier_mut(&mut self, id: ProcessId) -> &mut Thread {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "3aa22b21e666e214e3da184a948a54d03ecbb897b4c28e259f5e58e97054d2a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aa22b21e666e214e3da184a948a54d03ecbb897b4c28e259f5e58e97054d2a2", kill_on_drop: false }`
[INFO] [stdout] 3aa22b21e666e214e3da184a948a54d03ecbb897b4c28e259f5e58e97054d2a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 40dd1a03bcdaa44ad8b0ac9905ec570a1fdfbd99b0953a6f7eb47f5c4abf4b9f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "40dd1a03bcdaa44ad8b0ac9905ec570a1fdfbd99b0953a6f7eb47f5c4abf4b9f", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `sig`
[INFO] [stderr]    --> src/lib.rs:329:52
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stderr]     |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]    --> src/lib.rs:329:57
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stderr]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/database.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         path: D,
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tid`
[INFO] [stderr]   --> src/lib.rs:70:15
[INFO] [stderr]    |
[INFO] [stderr] 70 |     Unknown { tid: Pid },
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_pid`
[INFO] [stderr]    --> src/lib.rs:169:8
[INFO] [stderr]     |
[INFO] [stderr] 169 |     fn get_pid(&self, pid: Pid) -> &Thread {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_identifier`
[INFO] [stderr]    --> src/lib.rs:177:8
[INFO] [stderr]     |
[INFO] [stderr] 177 |     fn get_identifier(&self, id: ProcessId) -> &Thread {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_identifier_mut`
[INFO] [stderr]    --> src/lib.rs:182:8
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn get_identifier_mut(&mut self, id: ProcessId) -> &mut Thread {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sig`
[INFO] [stderr]    --> src/lib.rs:329:52
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stderr]     |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_sig`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `event`
[INFO] [stderr]    --> src/lib.rs:329:57
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 wait::WaitStatus::PtraceEvent(pid, sig, event) => {
[INFO] [stderr]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/database.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         path: D,
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tid`
[INFO] [stderr]   --> src/lib.rs:70:15
[INFO] [stderr]    |
[INFO] [stderr] 70 |     Unknown { tid: Pid },
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_pid`
[INFO] [stderr]    --> src/lib.rs:169:8
[INFO] [stderr]     |
[INFO] [stderr] 169 |     fn get_pid(&self, pid: Pid) -> &Thread {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_identifier`
[INFO] [stderr]    --> src/lib.rs:177:8
[INFO] [stderr]     |
[INFO] [stderr] 177 |     fn get_identifier(&self, id: ProcessId) -> &Thread {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_identifier_mut`
[INFO] [stderr]    --> src/lib.rs:182:8
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn get_identifier_mut(&mut self, id: ProcessId) -> &mut Thread {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/reprozip-f954b6f5e181ea2a)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-6c5b91d962c4cb4d)
[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] [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] [stderr]    Doc-tests reprozip
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - trace_arg0 (line 415) - compile ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40dd1a03bcdaa44ad8b0ac9905ec570a1fdfbd99b0953a6f7eb47f5c4abf4b9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40dd1a03bcdaa44ad8b0ac9905ec570a1fdfbd99b0953a6f7eb47f5c4abf4b9f", kill_on_drop: false }`
[INFO] [stdout] 40dd1a03bcdaa44ad8b0ac9905ec570a1fdfbd99b0953a6f7eb47f5c4abf4b9f