[INFO] cloning repository https://github.com/KCreate/pngencoder-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KCreate/pngencoder-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKCreate%2Fpngencoder-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKCreate%2Fpngencoder-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 083570fc3388b0e71a3bcb49240ef7873378bfd9
[INFO] testing KCreate/pngencoder-rust against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKCreate%2Fpngencoder-rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KCreate/pngencoder-rust on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KCreate/pngencoder-rust
[INFO] finished tweaking git repo https://github.com/KCreate/pngencoder-rust
[INFO] tweaked toml for git repo https://github.com/KCreate/pngencoder-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/KCreate/pngencoder-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b708a0944cc82978ae4c4f5038039f04f5e607da4712a043a1306182c4549551
[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" "b708a0944cc82978ae4c4f5038039f04f5e607da4712a043a1306182c4549551", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b708a0944cc82978ae4c4f5038039f04f5e607da4712a043a1306182c4549551", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b708a0944cc82978ae4c4f5038039f04f5e607da4712a043a1306182c4549551", kill_on_drop: false }`
[INFO] [stdout] b708a0944cc82978ae4c4f5038039f04f5e607da4712a043a1306182c4549551
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fefff987f113fd2737c131995007e4a4ac48df663568d7c949e573c0992b8153
[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" "fefff987f113fd2737c131995007e4a4ac48df663568d7c949e573c0992b8153", kill_on_drop: false }`
[INFO] [stderr]    Compiling tiff v0.6.1
[INFO] [stderr]    Compiling image v0.23.12
[INFO] [stderr]    Compiling pngencoder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `ImageRgba8` in crate `image`
[INFO] [stdout]   --> src/main.rs:57:20
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = image::ImageRgba8(img).save(fout, image::PNG);
[INFO] [stdout]    |                    ^^^^^^^^^^ not found in `image`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this tuple variant
[INFO] [stdout]    |
[INFO] [stdout] 3  | use image::DynamicImage::ImageRgba8;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `PNG` in crate `image`
[INFO] [stdout]   --> src/main.rs:57:54
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = image::ImageRgba8(img).save(fout, image::PNG);
[INFO] [stdout]    |                                                      ^^^ not found in `image`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngencoder`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "fefff987f113fd2737c131995007e4a4ac48df663568d7c949e573c0992b8153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fefff987f113fd2737c131995007e4a4ac48df663568d7c949e573c0992b8153", kill_on_drop: false }`
[INFO] [stdout] fefff987f113fd2737c131995007e4a4ac48df663568d7c949e573c0992b8153