[INFO] cloning repository https://github.com/SanchithHegde/png-message-encode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SanchithHegde/png-message-encode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSanchithHegde%2Fpng-message-encode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSanchithHegde%2Fpng-message-encode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bd58eb2fd4788b8b39ee55d593448bbbbe43be6c
[INFO] checking SanchithHegde/png-message-encode against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSanchithHegde%2Fpng-message-encode" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SanchithHegde/png-message-encode on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SanchithHegde/png-message-encode
[INFO] finished tweaking git repo https://github.com/SanchithHegde/png-message-encode
[INFO] tweaked toml for git repo https://github.com/SanchithHegde/png-message-encode written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/SanchithHegde/png-message-encode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1156869f955480e323ea2fa906ac447f17d8822839fc1b205b426cc1840969f5
[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" "1156869f955480e323ea2fa906ac447f17d8822839fc1b205b426cc1840969f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1156869f955480e323ea2fa906ac447f17d8822839fc1b205b426cc1840969f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1156869f955480e323ea2fa906ac447f17d8822839fc1b205b426cc1840969f5", kill_on_drop: false }`
[INFO] [stdout] 1156869f955480e323ea2fa906ac447f17d8822839fc1b205b426cc1840969f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a92954fd50506dd5790e749791bd7e2176f944e1ddca232fad48f3a980ad85e
[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" "4a92954fd50506dd5790e749791bd7e2176f944e1ddca232fad48f3a980ad85e", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.4.6
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking png-message-encode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/chunk.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn length(&self) -> u32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `data`
[INFO] [stdout]   --> src/chunk.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn data(&self) -> &[u8] {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crc`
[INFO] [stdout]   --> src/chunk.rs:54:19
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub(crate) fn crc(&self) -> u32 {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `header`
[INFO] [stdout]   --> src/png.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `data`
[INFO] [stdout]   --> src/chunk.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn data(&self) -> &[u8] {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `header`
[INFO] [stdout]   --> src/png.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.03s
[INFO] running `Command { std: "docker" "inspect" "4a92954fd50506dd5790e749791bd7e2176f944e1ddca232fad48f3a980ad85e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a92954fd50506dd5790e749791bd7e2176f944e1ddca232fad48f3a980ad85e", kill_on_drop: false }`
[INFO] [stdout] 4a92954fd50506dd5790e749791bd7e2176f944e1ddca232fad48f3a980ad85e