[INFO] crate png 0.16.3 is already in cache
[INFO] checking png-0.16.3 against master#6d69caba110c0c2fb90180df1cbc8be5033b91d4 for pr-69530
[INFO] extracting crate png 0.16.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate png 0.16.3 on toolchain 6d69caba110c0c2fb90180df1cbc8be5033b91d4
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate png 0.16.3
[INFO] finished tweaking crates.io crate png 0.16.3
[INFO] tweaked toml for crates.io crate png 0.16.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate png 0.16.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7fd672093a7a2e15952cdefe96648be931b63ffd05293a2a340ddbedeb80c683
[INFO] running `"docker" "start" "-a" "7fd672093a7a2e15952cdefe96648be931b63ffd05293a2a340ddbedeb80c683"`
[INFO] [stderr]    Compiling xml-rs v0.8.1
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking deflate v0.8.3
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking line_drawing v0.7.0
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking rusttype v0.8.2
[INFO] [stderr]     Checking png v0.16.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.6
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.4
[INFO] [stderr]    Compiling glium v0.24.0
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.5
[INFO] [stderr]     Checking glutin v0.20.1
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> examples/show.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 26s
[INFO] running `"docker" "inspect" "7fd672093a7a2e15952cdefe96648be931b63ffd05293a2a340ddbedeb80c683"`
[INFO] running `"docker" "rm" "-f" "7fd672093a7a2e15952cdefe96648be931b63ffd05293a2a340ddbedeb80c683"`
[INFO] [stdout] 7fd672093a7a2e15952cdefe96648be931b63ffd05293a2a340ddbedeb80c683