[INFO] fetching crate pngeq 0.1.0...
[INFO] checking pngeq-0.1.0 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate pngeq 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate pngeq 0.1.0 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pngeq 0.1.0
[INFO] finished tweaking crates.io crate pngeq 0.1.0
[INFO] tweaked toml for crates.io crate pngeq 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3e32e424b1c06a3656c720c7656074057951901fd015a751fabdd3e19d7ceeed
[INFO] running `Command { std: "docker" "start" "-a" "3e32e424b1c06a3656c720c7656074057951901fd015a751fabdd3e19d7ceeed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e32e424b1c06a3656c720c7656074057951901fd015a751fabdd3e19d7ceeed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e32e424b1c06a3656c720c7656074057951901fd015a751fabdd3e19d7ceeed", kill_on_drop: false }`
[INFO] [stdout] 3e32e424b1c06a3656c720c7656074057951901fd015a751fabdd3e19d7ceeed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3f1be94fda039d820c2bac0c7b8315cdf37eb5cbc0bdb5ea5345c8454b24405
[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" "b3f1be94fda039d820c2bac0c7b8315cdf37eb5cbc0bdb5ea5345c8454b24405", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling lodepng v0.8.1
[INFO] [stderr]     Checking c_vec v1.0.12
[INFO] [stderr]     Checking exoquant v0.2.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking pngeq v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:38:23
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let ditherer: Box<ditherer::Ditherer> = match matches.value_of("ditherer")
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ditherer::Ditherer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:38
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let (optimizer, opt_level): (Box<Optimizer>, u32) = match matches.value_of("optimization level")
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Optimizer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:38:23
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let ditherer: Box<ditherer::Ditherer> = match matches.value_of("ditherer")
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ditherer::Ditherer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:55:38
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let (optimizer, opt_level): (Box<Optimizer>, u32) = match matches.value_of("optimization level")
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Optimizer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.25s
[INFO] running `Command { std: "docker" "inspect" "b3f1be94fda039d820c2bac0c7b8315cdf37eb5cbc0bdb5ea5345c8454b24405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3f1be94fda039d820c2bac0c7b8315cdf37eb5cbc0bdb5ea5345c8454b24405", kill_on_drop: false }`
[INFO] [stdout] b3f1be94fda039d820c2bac0c7b8315cdf37eb5cbc0bdb5ea5345c8454b24405