[INFO] updating cached repository https://github.com/Jasperav/imagebufferrust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2a41f507b0f9d51a8dbd55689a76db972a9c5e34
[INFO] checking Jasperav/imagebufferrust against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJasperav%2Fimagebufferrust" "/workspace/builds/worker-13/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jasperav/imagebufferrust on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Jasperav/imagebufferrust
[INFO] finished tweaking git repo https://github.com/Jasperav/imagebufferrust
[INFO] tweaked toml for git repo https://github.com/Jasperav/imagebufferrust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Jasperav/imagebufferrust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "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] f9e37bd48859e73a560e18e37d596d935d6375bdc95e4544faa3fcfa9c58dd3c
[INFO] running `"docker" "start" "-a" "f9e37bd48859e73a560e18e37d596d935d6375bdc95e4544faa3fcfa9c58dd3c"`
[INFO] [stderr]     Checking tiff v0.4.0
[INFO] [stderr]     Checking png v0.15.2
[INFO] [stderr]     Checking image v0.23.0-preview.0
[INFO] [stderr]     Checking imagebufferrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `converted`
[INFO] [stderr]  --> src/main.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let converted = image::load_from_memory(&pixels);
[INFO] [stderr]   |             ^^^^^^^^^ help: consider prefixing with an underscore: `_converted`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted_with_format`
[INFO] [stderr]  --> src/main.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let converted_with_format = image::load_from_memory_with_format(&pixels, ImageFormat::Png).unwrap();
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_converted_with_format`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted`
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let converted = image::load_from_memory(&pixels);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_converted`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted_with_format`
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let converted_with_format = image::load_from_memory_with_format(&pixels, ImageFormat::Jpeg).unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_converted_with_format`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted`
[INFO] [stderr]  --> src/main.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |         let converted = image::load_from_memory(&pixels);
[INFO] [stderr]   |             ^^^^^^^^^ help: consider prefixing with an underscore: `_converted`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted_with_format`
[INFO] [stderr]  --> src/main.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let converted_with_format = image::load_from_memory_with_format(&pixels, ImageFormat::Png).unwrap();
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_converted_with_format`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted`
[INFO] [stderr]   --> src/main.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let converted = image::load_from_memory(&pixels);
[INFO] [stderr]    |             ^^^^^^^^^ help: consider prefixing with an underscore: `_converted`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `converted_with_format`
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let converted_with_format = image::load_from_memory_with_format(&pixels, ImageFormat::Jpeg).unwrap();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_converted_with_format`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.37s
[INFO] running `"docker" "inspect" "f9e37bd48859e73a560e18e37d596d935d6375bdc95e4544faa3fcfa9c58dd3c"`
[INFO] running `"docker" "rm" "-f" "f9e37bd48859e73a560e18e37d596d935d6375bdc95e4544faa3fcfa9c58dd3c"`
[INFO] [stdout] f9e37bd48859e73a560e18e37d596d935d6375bdc95e4544faa3fcfa9c58dd3c