[INFO] fetching crate devpng 0.1.2...
[INFO] testing devpng-0.1.2 against 1.76.0 for beta-1.77-1
[INFO] extracting crate devpng 0.1.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate devpng 0.1.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate devpng 0.1.2
[INFO] finished tweaking crates.io crate devpng 0.1.2
[INFO] tweaked toml for crates.io crate devpng 0.1.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded devker v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f67ad45df94c463ec7ada7f54b9879a07eb4804ebfd927c00d15f77e81e16af0
[INFO] running `Command { std: "docker" "start" "-a" "f67ad45df94c463ec7ada7f54b9879a07eb4804ebfd927c00d15f77e81e16af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f67ad45df94c463ec7ada7f54b9879a07eb4804ebfd927c00d15f77e81e16af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f67ad45df94c463ec7ada7f54b9879a07eb4804ebfd927c00d15f77e81e16af0", kill_on_drop: false }`
[INFO] [stdout] f67ad45df94c463ec7ada7f54b9879a07eb4804ebfd927c00d15f77e81e16af0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f100d9034befacdd753782399dcf2b7f668544a396d88df9c12e4a7efb8a940
[INFO] running `Command { std: "docker" "start" "-a" "1f100d9034befacdd753782399dcf2b7f668544a396d88df9c12e4a7efb8a940", kill_on_drop: false }`
[INFO] [stderr]    Compiling devker v0.1.6
[INFO] [stderr]    Compiling devpng v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "1f100d9034befacdd753782399dcf2b7f668544a396d88df9c12e4a7efb8a940", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f100d9034befacdd753782399dcf2b7f668544a396d88df9c12e4a7efb8a940", kill_on_drop: false }`
[INFO] [stdout] 1f100d9034befacdd753782399dcf2b7f668544a396d88df9c12e4a7efb8a940
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4c0d1e38bf07213677c6c923e459169e75b4734fce9f1081ea5384688598732
[INFO] running `Command { std: "docker" "start" "-a" "f4c0d1e38bf07213677c6c923e459169e75b4734fce9f1081ea5384688598732", kill_on_drop: false }`
[INFO] [stderr]    Compiling devpng v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "f4c0d1e38bf07213677c6c923e459169e75b4734fce9f1081ea5384688598732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4c0d1e38bf07213677c6c923e459169e75b4734fce9f1081ea5384688598732", kill_on_drop: false }`
[INFO] [stdout] f4c0d1e38bf07213677c6c923e459169e75b4734fce9f1081ea5384688598732
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 389dcf9fc114aff5678560aef93809916088835499f547761fe0e8f75f09a371
[INFO] running `Command { std: "docker" "start" "-a" "389dcf9fc114aff5678560aef93809916088835499f547761fe0e8f75f09a371", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/devpng-0ae603d012373f52)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests devpng
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 57) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 4) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 28) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 57) stdout ----
[INFO] [stdout] error[E0596]: cannot borrow `img` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/lib.rs:72:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for x in img.iter_mut() {
[INFO] [stdout]    |              ^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut img = cache.image();
[INFO] [stdout]    |         +++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 4) stdout ----
[INFO] [stdout] error[E0596]: cannot borrow `img` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/lib.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for x in img.iter_mut() {
[INFO] [stdout]    |              ^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut img = png.image();
[INFO] [stdout]    |         +++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 28) stdout ----
[INFO] [stdout] Test executable failed (exit status: 1).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] Error: "Read-only file system (os error 30)"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 28)
[INFO] [stdout]     src/lib.rs - (line 4)
[INFO] [stdout]     src/lib.rs - (line 57)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.22s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "389dcf9fc114aff5678560aef93809916088835499f547761fe0e8f75f09a371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "389dcf9fc114aff5678560aef93809916088835499f547761fe0e8f75f09a371", kill_on_drop: false }`
[INFO] [stdout] 389dcf9fc114aff5678560aef93809916088835499f547761fe0e8f75f09a371
[INFO] testing devpng-0.1.2 against beta-2024-02-10 for beta-1.77-1
[INFO] extracting crate devpng 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate devpng 0.1.2 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate devpng 0.1.2
[INFO] finished tweaking crates.io crate devpng 0.1.2
[INFO] tweaked toml for crates.io crate devpng 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93497a1712aa8500dd6ad6c2e85b3e321463df8ad533bd1108244f3f7cd7269c
[INFO] running `Command { std: "docker" "start" "-a" "93497a1712aa8500dd6ad6c2e85b3e321463df8ad533bd1108244f3f7cd7269c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93497a1712aa8500dd6ad6c2e85b3e321463df8ad533bd1108244f3f7cd7269c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93497a1712aa8500dd6ad6c2e85b3e321463df8ad533bd1108244f3f7cd7269c", kill_on_drop: false }`
[INFO] [stdout] 93497a1712aa8500dd6ad6c2e85b3e321463df8ad533bd1108244f3f7cd7269c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6eb45e5db59d40c18994905e8281b2b288df60edffc47156805ff5a62e3bf46d
[INFO] running `Command { std: "docker" "start" "-a" "6eb45e5db59d40c18994905e8281b2b288df60edffc47156805ff5a62e3bf46d", kill_on_drop: false }`
[INFO] [stderr]    Compiling devker v0.1.6
[INFO] [stderr]    Compiling devpng v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/bkgd.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/sbit.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/trns.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "6eb45e5db59d40c18994905e8281b2b288df60edffc47156805ff5a62e3bf46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eb45e5db59d40c18994905e8281b2b288df60edffc47156805ff5a62e3bf46d", kill_on_drop: false }`
[INFO] [stdout] 6eb45e5db59d40c18994905e8281b2b288df60edffc47156805ff5a62e3bf46d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85571106ca4484878567ebc6ac9724352e87fdae0793cba93d54b31e22277dfc
[INFO] running `Command { std: "docker" "start" "-a" "85571106ca4484878567ebc6ac9724352e87fdae0793cba93d54b31e22277dfc", kill_on_drop: false }`
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/bkgd.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling devpng v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/sbit.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/trns.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/bkgd.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/sbit.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct SbitMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]  --> src/chunk/trns.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ColourType);
[INFO] [stdout]   |            -------                   ^^^^^^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ());
[INFO] [stdout]   |                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "85571106ca4484878567ebc6ac9724352e87fdae0793cba93d54b31e22277dfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85571106ca4484878567ebc6ac9724352e87fdae0793cba93d54b31e22277dfc", kill_on_drop: false }`
[INFO] [stdout] 85571106ca4484878567ebc6ac9724352e87fdae0793cba93d54b31e22277dfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 839987224cb7c23739365ca9ead7fd92a4c29a521b0345594eec8ba0fe5a3a83
[INFO] running `Command { std: "docker" "start" "-a" "839987224cb7c23739365ca9ead7fd92a4c29a521b0345594eec8ba0fe5a3a83", kill_on_drop: false }`
[INFO] [stderr] warning: field `1` is never read
[INFO] [stderr]  --> src/chunk/bkgd.rs:6:38
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ColourType);
[INFO] [stderr]   |            -------                   ^^^^^^^^^^
[INFO] [stderr]   |            |
[INFO] [stderr]   |            field in this struct
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct BkgdMut<'a>(&'a mut [u8], ());
[INFO] [stderr]   |                                      ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `1` is never read
[INFO] [stderr]  --> src/chunk/sbit.rs:6:38
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct SbitMut<'a>(&'a mut [u8], ColourType);
[INFO] [stderr]   |            -------                   ^^^^^^^^^^
[INFO] [stderr]   |            |
[INFO] [stderr]   |            field in this struct
[INFO] [stderr]   |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct SbitMut<'a>(&'a mut [u8], ());
[INFO] [stderr]   |                                      ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `1` is never read
[INFO] [stderr]  --> src/chunk/trns.rs:6:38
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ColourType);
[INFO] [stderr]   |            -------                   ^^^^^^^^^^
[INFO] [stderr]   |            |
[INFO] [stderr]   |            field in this struct
[INFO] [stderr]   |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct TrnsMut<'a>(&'a mut [u8], ());
[INFO] [stderr]   |                                      ~~
[INFO] [stderr] 
[INFO] [stderr] warning: `devpng` (lib) generated 3 warnings
[INFO] [stderr] warning: `devpng` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/devpng-0820c720332f3625)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests devpng
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 57) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 4) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 28) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 57) stdout ----
[INFO] [stdout] error[E0596]: cannot borrow `img` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/lib.rs:72:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for x in img.iter_mut() {
[INFO] [stdout]    |              ^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut img = cache.image();
[INFO] [stdout]    |         +++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 4) stdout ----
[INFO] [stdout] error[E0596]: cannot borrow `img` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> src/lib.rs:18:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     for x in img.iter_mut() {
[INFO] [stdout]    |              ^^^ cannot borrow as mutable
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing this to be mutable
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut img = png.image();
[INFO] [stdout]    |         +++
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - (line 28) stdout ----
[INFO] [stdout] Test executable failed (exit status: 1).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] Error: "Read-only file system (os error 30)"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 28)
[INFO] [stdout]     src/lib.rs - (line 4)
[INFO] [stdout]     src/lib.rs - (line 57)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.34s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "839987224cb7c23739365ca9ead7fd92a4c29a521b0345594eec8ba0fe5a3a83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "839987224cb7c23739365ca9ead7fd92a4c29a521b0345594eec8ba0fe5a3a83", kill_on_drop: false }`
[INFO] [stdout] 839987224cb7c23739365ca9ead7fd92a4c29a521b0345594eec8ba0fe5a3a83
