[INFO] cloning repository https://github.com/nowlow/Chronometer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nowlow/Chronometer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnowlow%2FChronometer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnowlow%2FChronometer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8730f6063c0f03966334f7926058974e378e80d2
[INFO] testing nowlow/Chronometer against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnowlow%2FChronometer" "/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/nowlow/Chronometer
[INFO] finished tweaking git repo https://github.com/nowlow/Chronometer
[INFO] tweaked toml for git repo https://github.com/nowlow/Chronometer written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nowlow/Chronometer on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nowlow/Chronometer 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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f40659d4d2bccd7458d6958dfaa1b2b2507252c40820efcba5e5500dac7b72ca
[INFO] running `Command { std: "docker" "start" "-a" "f40659d4d2bccd7458d6958dfaa1b2b2507252c40820efcba5e5500dac7b72ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f40659d4d2bccd7458d6958dfaa1b2b2507252c40820efcba5e5500dac7b72ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f40659d4d2bccd7458d6958dfaa1b2b2507252c40820efcba5e5500dac7b72ca", kill_on_drop: false }`
[INFO] [stdout] f40659d4d2bccd7458d6958dfaa1b2b2507252c40820efcba5e5500dac7b72ca
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7acbd8c6d16459858986bfe7444c1f50d59fb35652853a5d6344b068caaa1f33
[INFO] running `Command { std: "docker" "start" "-a" "7acbd8c6d16459858986bfe7444c1f50d59fb35652853a5d6344b068caaa1f33", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling chronometer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "7acbd8c6d16459858986bfe7444c1f50d59fb35652853a5d6344b068caaa1f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7acbd8c6d16459858986bfe7444c1f50d59fb35652853a5d6344b068caaa1f33", kill_on_drop: false }`
[INFO] [stdout] 7acbd8c6d16459858986bfe7444c1f50d59fb35652853a5d6344b068caaa1f33
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca23b4e62104bfe067e691355afc0ad3c7599d1581f556959ebee4e8c6f95ea5
[INFO] running `Command { std: "docker" "start" "-a" "ca23b4e62104bfe067e691355afc0ad3c7599d1581f556959ebee4e8c6f95ea5", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling chronometer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "ca23b4e62104bfe067e691355afc0ad3c7599d1581f556959ebee4e8c6f95ea5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca23b4e62104bfe067e691355afc0ad3c7599d1581f556959ebee4e8c6f95ea5", kill_on_drop: false }`
[INFO] [stdout] ca23b4e62104bfe067e691355afc0ad3c7599d1581f556959ebee4e8c6f95ea5
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f1c011af060643ccfe3a97f68648af9eb4acbc7c0646a2c6a560410badf5ecf2
[INFO] running `Command { std: "docker" "start" "-a" "f1c011af060643ccfe3a97f68648af9eb4acbc7c0646a2c6a560410badf5ecf2", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/chronometer-bf8db677aac982f5)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::create ... ok
[INFO] [stdout] test test::pause ... ok
[INFO] [stdout] test test::start ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests chronometer
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - Chronometer::lap (line 93) ... FAILED
[INFO] [stdout] test src/lib.rs - Chronometer::duration (line 147) ... FAILED
[INFO] [stdout] test src/lib.rs - Chronometer::reset (line 118) ... FAILED
[INFO] [stdout] test src/lib.rs - Chronometer::start (line 45) ... FAILED
[INFO] [stdout] test src/lib.rs - Chronometer::new (line 24) ... ok
[INFO] [stdout] test src/lib.rs - Chronometer::pause (line 60) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - Chronometer::lap (line 93) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:94:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | chrono.start();
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `time`
[INFO] [stdout]  --> src/lib.rs:96:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | let time = time::Duration::from_millis(100);
[INFO] [stdout]   |            ^^^^ use of unresolved module or unlinked crate `time`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `time`, use `cargo add time` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::time::Duration;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `Duration`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 5 - let time = time::Duration::from_millis(100);
[INFO] [stdout] 5 + let time = Duration::from_millis(100);
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]  --> src/lib.rs:98:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | thread::sleep(time);
[INFO] [stdout]   | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::thread;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:100:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | chrono.lap(); // chono.laps == [Duration<0.1s>, Duration<0.2s>]
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   --> src/lib.rs:102:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | thread::sleep(time);
[INFO] [stdout]    | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 2  + use std::thread;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]   --> src/lib.rs:104:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | chrono.lap();
[INFO] [stdout]    | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Chronometer::duration (line 147) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:148:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | chrono.start();
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `time`
[INFO] [stdout]  --> src/lib.rs:150:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | let time = time::Duration::from_millis(100);
[INFO] [stdout]   |            ^^^^ use of unresolved module or unlinked crate `time`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `time`, use `cargo add time` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::time::Duration;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `Duration`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 5 - let time = time::Duration::from_millis(100);
[INFO] [stdout] 5 + let time = Duration::from_millis(100);
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]  --> src/lib.rs:152:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | thread::sleep(time);
[INFO] [stdout]   | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::thread;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:154:25
[INFO] [stdout]   |
[INFO] [stdout] 9 | println!("elapsed: {}", chrono.duration().as_millis());
[INFO] [stdout]   |                         ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Chronometer::reset (line 118) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:119:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | chrono.start();
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `time`
[INFO] [stdout]  --> src/lib.rs:121:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | let time = time::Duration::from_millis(100);
[INFO] [stdout]   |            ^^^^ use of unresolved module or unlinked crate `time`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `time`, use `cargo add time` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::time::Duration;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `Duration`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 5 - let time = time::Duration::from_millis(100);
[INFO] [stdout] 5 + let time = Duration::from_millis(100);
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]  --> src/lib.rs:123:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | thread::sleep(time);
[INFO] [stdout]   | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::thread;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:125:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | chrono.lap(); // chono.laps == [Duration<0.1s>, Duration<0.2s>]
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]   --> src/lib.rs:126:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | chrono.reset();
[INFO] [stdout]    | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Chronometer::start (line 45) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:46:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | chrono.start();
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - Chronometer::pause (line 60) stdout ----
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:61:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | chrono.start();
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `time`
[INFO] [stdout]  --> src/lib.rs:63:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | let time = time::Duration::from_millis(100);
[INFO] [stdout]   |            ^^^^ use of unresolved module or unlinked crate `time`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `time`, use `cargo add time` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::time::Duration;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `Duration`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 5 - let time = time::Duration::from_millis(100);
[INFO] [stdout] 5 + let time = Duration::from_millis(100);
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]  --> src/lib.rs:65:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | thread::sleep(time);
[INFO] [stdout]   | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::thread;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]  --> src/lib.rs:66:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | chrono.pause(); // chrono.duration == Duration<0.1s>
[INFO] [stdout]   | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]  --> src/lib.rs:67:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | thread::sleep(time);
[INFO] [stdout]   | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use std::thread;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `chrono` in this scope
[INFO] [stdout]   --> src/lib.rs:71:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | chrono.start();
[INFO] [stdout]    | ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]   --> src/lib.rs:72:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | thread::sleep(time);
[INFO] [stdout]    | ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]    |
[INFO] [stdout] 2  + use std::thread;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - Chronometer::duration (line 147)
[INFO] [stdout]     src/lib.rs - Chronometer::lap (line 93)
[INFO] [stdout]     src/lib.rs - Chronometer::pause (line 60)
[INFO] [stdout]     src/lib.rs - Chronometer::reset (line 118)
[INFO] [stdout]     src/lib.rs - Chronometer::start (line 45)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.41s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "f1c011af060643ccfe3a97f68648af9eb4acbc7c0646a2c6a560410badf5ecf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1c011af060643ccfe3a97f68648af9eb4acbc7c0646a2c6a560410badf5ecf2", kill_on_drop: false }`
[INFO] [stdout] f1c011af060643ccfe3a97f68648af9eb4acbc7c0646a2c6a560410badf5ecf2
