[INFO] fetching crate captcha 0.0.8...
[INFO] testing captcha-0.0.8 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate captcha 0.0.8 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate captcha 0.0.8 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate captcha 0.0.8
[INFO] finished tweaking crates.io crate captcha 0.0.8
[INFO] tweaked toml for crates.io crate captcha 0.0.8 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate captcha 0.0.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-rational v0.3.1
[INFO] [stderr]   Downloaded bytemuck v1.4.0
[INFO] [stderr]   Downloaded lodepng v3.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9f2421f7f04b0343c3243437febe49795a297b083b3c162d959706dae6df6a7
[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" "e9f2421f7f04b0343c3243437febe49795a297b083b3c162d959706dae6df6a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9f2421f7f04b0343c3243437febe49795a297b083b3c162d959706dae6df6a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9f2421f7f04b0343c3243437febe49795a297b083b3c162d959706dae6df6a7", kill_on_drop: false }`
[INFO] [stdout] e9f2421f7f04b0343c3243437febe49795a297b083b3c162d959706dae6df6a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 251a35d0dad6e145fe161094503b741b3e46c581e9138ca950ed902944791587
[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" "251a35d0dad6e145fe161094503b741b3e46c581e9138ca950ed902944791587", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]    Compiling weezl v0.1.2
[INFO] [stderr]    Compiling bytemuck v1.4.0
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling hound v3.4.0
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.1
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling deflate v0.8.6
[INFO] [stderr]    Compiling crossbeam-channel v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling rgb v0.8.25
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling gif v0.11.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling png v0.16.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling flate2 v1.0.18
[INFO] [stderr]    Compiling lodepng v3.2.2
[INFO] [stderr]    Compiling jpeg-decoder v0.1.20
[INFO] [stderr]    Compiling tiff v0.6.0
[INFO] [stderr]    Compiling image v0.23.11
[INFO] [stderr]    Compiling captcha v0.0.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.76s
[INFO] running `Command { std: "docker" "inspect" "251a35d0dad6e145fe161094503b741b3e46c581e9138ca950ed902944791587", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "251a35d0dad6e145fe161094503b741b3e46c581e9138ca950ed902944791587", kill_on_drop: false }`
[INFO] [stdout] 251a35d0dad6e145fe161094503b741b3e46c581e9138ca950ed902944791587
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e98966563064afb8ef016af7f9134c6ab1fe7578de320e84c31654f9d03198ec
[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" "e98966563064afb8ef016af7f9134c6ab1fe7578de320e84c31654f9d03198ec", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling time-macros v0.1.1
[INFO] [stderr]    Compiling captcha v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::BufReader`
[INFO] [stdout]  --> examples/base64.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::BufReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stdout]  --> examples/perf.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use time::PreciseTime;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stdout]   --> examples/perf.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let b = PreciseTime::now();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stdout]   --> examples/perf.rs:20:35
[INFO] [stdout]    |
[INFO] [stdout] 20 |             println!("done {}ms", time::precise_time_ns() / 1000 / 1000);
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stdout]   --> examples/perf.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let c = PreciseTime::now();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `time::Instant::to`: Use `rhs - lhs`
[INFO] [stdout]   --> examples/perf.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let d = b.to(c).num_milliseconds();
[INFO] [stdout]    |               ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `time::Duration::num_milliseconds`: Use the `whole_milliseconds` function. The value is clamped between `i64::min_value()` and `i64::max_value()`.
[INFO] [stdout]   --> examples/perf.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let d = b.to(c).num_milliseconds();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 34.12s
[INFO] running `Command { std: "docker" "inspect" "e98966563064afb8ef016af7f9134c6ab1fe7578de320e84c31654f9d03198ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e98966563064afb8ef016af7f9134c6ab1fe7578de320e84c31654f9d03198ec", kill_on_drop: false }`
[INFO] [stdout] e98966563064afb8ef016af7f9134c6ab1fe7578de320e84c31654f9d03198ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4e813a88ef2e38b41834066b08095e4a843bc5f23c6cd023a9fb6270b0085611
[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" "4e813a88ef2e38b41834066b08095e4a843bc5f23c6cd023a9fb6270b0085611", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stdout] running 4 tests
[INFO] [stderr]  --> examples/perf.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use time::PreciseTime;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stderr]   --> examples/perf.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let b = PreciseTime::now();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `time::precise_time_ns`: Use `OffsetDateTime::now() - OffsetDateTime::unix_epoch()` to get a `Duration` since a known epoch.
[INFO] [stderr]   --> examples/perf.rs:20:35
[INFO] [stderr]    |
[INFO] [stderr] 20 |             println!("done {}ms", time::precise_time_ns() / 1000 / 1000);
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated type alias `time::PreciseTime`: Use `Instant`
[INFO] [stderr]   --> examples/perf.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let c = PreciseTime::now();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `time::Instant::to`: Use `rhs - lhs`
[INFO] [stderr]   --> examples/perf.rs:30:15
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let d = b.to(c).num_milliseconds();
[INFO] [stderr]    |               ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `time::Duration::num_milliseconds`: Use the `whole_milliseconds` function. The value is clamped between `i64::min_value()` and `i64::max_value()`.
[INFO] [stderr]   --> examples/perf.rs:30:21
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let d = b.to(c).num_milliseconds();
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufReader`
[INFO] [stderr]  --> examples/base64.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::BufReader;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/captcha-b96d41ae4d67a7bd
[INFO] [stdout] test tests::image_size ... ok
[INFO] [stdout] test fonts::tests::fonts_default ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test audio::tests::length_of_all_audio ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests captcha
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/samples/mod.rs - samples (line 8) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 6.08s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4e813a88ef2e38b41834066b08095e4a843bc5f23c6cd023a9fb6270b0085611", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e813a88ef2e38b41834066b08095e4a843bc5f23c6cd023a9fb6270b0085611", kill_on_drop: false }`
[INFO] [stdout] 4e813a88ef2e38b41834066b08095e4a843bc5f23c6cd023a9fb6270b0085611