[INFO] fetching crate captcha 0.0.8...
[INFO] checking captcha-0.0.8 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate captcha 0.0.8 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate captcha 0.0.8 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-0/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17bfa41a5af7d09e1b9057843c29a14e8e85fda0f1520e56643e4316dc30263f
[INFO] running `Command { std: "docker" "start" "-a" "17bfa41a5af7d09e1b9057843c29a14e8e85fda0f1520e56643e4316dc30263f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17bfa41a5af7d09e1b9057843c29a14e8e85fda0f1520e56643e4316dc30263f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17bfa41a5af7d09e1b9057843c29a14e8e85fda0f1520e56643e4316dc30263f", kill_on_drop: false }`
[INFO] [stdout] 17bfa41a5af7d09e1b9057843c29a14e8e85fda0f1520e56643e4316dc30263f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f430f707b2b43e6b1d757f29f4594865787adeaed33f7eafa0557d20de8d103e
[INFO] running `Command { std: "docker" "start" "-a" "f430f707b2b43e6b1d757f29f4594865787adeaed33f7eafa0557d20de8d103e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]    Compiling rayon-core v1.8.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking weezl v0.1.2
[INFO] [stderr]     Checking bytemuck v1.4.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling memoffset v0.5.5
[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 standback v0.2.11
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rgb v0.8.25
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking flate2 v1.0.18
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking lodepng v3.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking tiff v0.6.0
[INFO] [stderr]     Checking image v0.23.11
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking 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: 1 warning emitted
[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: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.61s
[INFO] running `Command { std: "docker" "inspect" "f430f707b2b43e6b1d757f29f4594865787adeaed33f7eafa0557d20de8d103e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f430f707b2b43e6b1d757f29f4594865787adeaed33f7eafa0557d20de8d103e", kill_on_drop: false }`
[INFO] [stdout] f430f707b2b43e6b1d757f29f4594865787adeaed33f7eafa0557d20de8d103e