[INFO] fetching crate stringutils 0.0.3...
[INFO] testing stringutils-0.0.3 against 1.76.0 for beta-1.77-1
[INFO] extracting crate stringutils 0.0.3 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate stringutils 0.0.3 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stringutils 0.0.3
[INFO] finished tweaking crates.io crate stringutils 0.0.3
[INFO] tweaked toml for crates.io crate stringutils 0.0.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15640eadb7adfd64425cf214e15c0132659f7c50af52f45d6ab1a05ee2c5cbc1
[INFO] running `Command { std: "docker" "start" "-a" "15640eadb7adfd64425cf214e15c0132659f7c50af52f45d6ab1a05ee2c5cbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15640eadb7adfd64425cf214e15c0132659f7c50af52f45d6ab1a05ee2c5cbc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15640eadb7adfd64425cf214e15c0132659f7c50af52f45d6ab1a05ee2c5cbc1", kill_on_drop: false }`
[INFO] [stdout] 15640eadb7adfd64425cf214e15c0132659f7c50af52f45d6ab1a05ee2c5cbc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2616f772fc37d0da66a044b635e8163b3d6c57b5b4d3a6160c4b1667acdb1c25
[INFO] running `Command { std: "docker" "start" "-a" "2616f772fc37d0da66a044b635e8163b3d6c57b5b4d3a6160c4b1667acdb1c25", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringutils v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "2616f772fc37d0da66a044b635e8163b3d6c57b5b4d3a6160c4b1667acdb1c25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2616f772fc37d0da66a044b635e8163b3d6c57b5b4d3a6160c4b1667acdb1c25", kill_on_drop: false }`
[INFO] [stdout] 2616f772fc37d0da66a044b635e8163b3d6c57b5b4d3a6160c4b1667acdb1c25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 020514327b68370e01c63422e16a83664106dbe35cb1347346151b2022b31579
[INFO] running `Command { std: "docker" "start" "-a" "020514327b68370e01c63422e16a83664106dbe35cb1347346151b2022b31579", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringutils v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "020514327b68370e01c63422e16a83664106dbe35cb1347346151b2022b31579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "020514327b68370e01c63422e16a83664106dbe35cb1347346151b2022b31579", kill_on_drop: false }`
[INFO] [stdout] 020514327b68370e01c63422e16a83664106dbe35cb1347346151b2022b31579
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f352218bb2aafcd1e5404d0eec1f7d0a14302479c3331fa8a436683d8707a7c3
[INFO] running `Command { std: "docker" "start" "-a" "f352218bb2aafcd1e5404d0eec1f7d0a14302479c3331fa8a436683d8707a7c3", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stringutils-a4da3520bbf03003)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_ba_to_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stringutils
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - timestamp_to_string (line 37) ... FAILED
[INFO] [stdout] test src/lib.rs - byte_array_to_string (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - timestamp_to_string (line 37) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `libc`
[INFO] [stdout]  --> src/lib.rs:39:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | let current_time = unsafe { libc::time(std::ptr::null_mut()) };
[INFO] [stdout]   |                             ^^^^ use of undeclared crate or module `libc`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - timestamp_to_string (line 37)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.18s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "f352218bb2aafcd1e5404d0eec1f7d0a14302479c3331fa8a436683d8707a7c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f352218bb2aafcd1e5404d0eec1f7d0a14302479c3331fa8a436683d8707a7c3", kill_on_drop: false }`
[INFO] [stdout] f352218bb2aafcd1e5404d0eec1f7d0a14302479c3331fa8a436683d8707a7c3
[INFO] testing stringutils-0.0.3 against beta-2024-02-10 for beta-1.77-1
[INFO] extracting crate stringutils 0.0.3 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate stringutils 0.0.3 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stringutils 0.0.3
[INFO] finished tweaking crates.io crate stringutils 0.0.3
[INFO] tweaked toml for crates.io crate stringutils 0.0.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5002eda3dfbeb45a0c8bd818743715e95e2819ef9d5fde7b6053e20d6a73c73a
[INFO] running `Command { std: "docker" "start" "-a" "5002eda3dfbeb45a0c8bd818743715e95e2819ef9d5fde7b6053e20d6a73c73a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5002eda3dfbeb45a0c8bd818743715e95e2819ef9d5fde7b6053e20d6a73c73a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5002eda3dfbeb45a0c8bd818743715e95e2819ef9d5fde7b6053e20d6a73c73a", kill_on_drop: false }`
[INFO] [stdout] 5002eda3dfbeb45a0c8bd818743715e95e2819ef9d5fde7b6053e20d6a73c73a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b2f9489ccbfe7f9ee09c1aa3ed736932c2cb159fb79a6d96953178643c7aecb
[INFO] running `Command { std: "docker" "start" "-a" "5b2f9489ccbfe7f9ee09c1aa3ed736932c2cb159fb79a6d96953178643c7aecb", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringutils v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "5b2f9489ccbfe7f9ee09c1aa3ed736932c2cb159fb79a6d96953178643c7aecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b2f9489ccbfe7f9ee09c1aa3ed736932c2cb159fb79a6d96953178643c7aecb", kill_on_drop: false }`
[INFO] [stdout] 5b2f9489ccbfe7f9ee09c1aa3ed736932c2cb159fb79a6d96953178643c7aecb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9fd175321927d0e33b1bad81c3bd08ad0091f8a5ab1a55e8eb412587a204bfc
[INFO] running `Command { std: "docker" "start" "-a" "b9fd175321927d0e33b1bad81c3bd08ad0091f8a5ab1a55e8eb412587a204bfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling stringutils v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "b9fd175321927d0e33b1bad81c3bd08ad0091f8a5ab1a55e8eb412587a204bfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9fd175321927d0e33b1bad81c3bd08ad0091f8a5ab1a55e8eb412587a204bfc", kill_on_drop: false }`
[INFO] [stdout] b9fd175321927d0e33b1bad81c3bd08ad0091f8a5ab1a55e8eb412587a204bfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0be369908f6902f6dadbf82c47c8da9c5f66f45f71d27e2bcea1e3690e96c19c
[INFO] running `Command { std: "docker" "start" "-a" "0be369908f6902f6dadbf82c47c8da9c5f66f45f71d27e2bcea1e3690e96c19c", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stringutils-230e7abd83f0ccd2)
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_ba_to_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stringutils
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - timestamp_to_string (line 37) ... FAILED
[INFO] [stdout] test src/lib.rs - byte_array_to_string (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - timestamp_to_string (line 37) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `libc`
[INFO] [stdout]  --> src/lib.rs:39:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | let current_time = unsafe { libc::time(std::ptr::null_mut()) };
[INFO] [stdout]   |                             ^^^^ use of undeclared crate or module `libc`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - timestamp_to_string (line 37)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.22s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "0be369908f6902f6dadbf82c47c8da9c5f66f45f71d27e2bcea1e3690e96c19c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0be369908f6902f6dadbf82c47c8da9c5f66f45f71d27e2bcea1e3690e96c19c", kill_on_drop: false }`
[INFO] [stdout] 0be369908f6902f6dadbf82c47c8da9c5f66f45f71d27e2bcea1e3690e96c19c
