[INFO] cloning repository https://github.com/hedonhermdev/png-message
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hedonhermdev/png-message" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedonhermdev%2Fpng-message", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedonhermdev%2Fpng-message'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c54017707e8ed5dbaacf3bcc54dabae41676a385
[INFO] checking hedonhermdev/png-message against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhedonhermdev%2Fpng-message" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hedonhermdev/png-message on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hedonhermdev/png-message
[INFO] finished tweaking git repo https://github.com/hedonhermdev/png-message
[INFO] tweaked toml for git repo https://github.com/hedonhermdev/png-message written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/hedonhermdev/png-message already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] af4b5391c19e4efe9b7dc506a0aec8fa33d0d7cc319d58e30c823ae5eee26260
[INFO] running `Command { std: "docker" "start" "-a" "af4b5391c19e4efe9b7dc506a0aec8fa33d0d7cc319d58e30c823ae5eee26260", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af4b5391c19e4efe9b7dc506a0aec8fa33d0d7cc319d58e30c823ae5eee26260", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af4b5391c19e4efe9b7dc506a0aec8fa33d0d7cc319d58e30c823ae5eee26260", kill_on_drop: false }`
[INFO] [stdout] af4b5391c19e4efe9b7dc506a0aec8fa33d0d7cc319d58e30c823ae5eee26260
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3d6e5c1ad19a5437ed5b554ca7b77ece1c3a7049a6bf19951860debd2934051
[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" "c3d6e5c1ad19a5437ed5b554ca7b77ece1c3a7049a6bf19951860debd2934051", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `data_as_string`
[INFO] [stdout]    --> src/chunk.rs:105:12
[INFO] [stdout]     |
[INFO] [stdout] 105 |     pub fn data_as_string(&self) -> Result<String, std::string::FromUtf8Error> {
[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: `crc`
[INFO] [stdout]    --> src/chunk.rs:109:12
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub fn crc(&self) -> u32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_reserved_bit_valid`
[INFO] [stdout]   --> src/chunk_type.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn is_reserved_bit_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_critical`
[INFO] [stdout]   --> src/chunk_type.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn is_critical(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_public`
[INFO] [stdout]   --> src/chunk_type.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn is_public(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]   --> src/chunk_type.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_safe_to_copy`
[INFO] [stdout]   --> src/chunk_type.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn is_safe_to_copy(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_chunks`
[INFO] [stdout]   --> src/png.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chunks`
[INFO] [stdout]   --> src/png.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn chunks(&self) -> &[Chunk] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.96s
[INFO] running `Command { std: "docker" "inspect" "c3d6e5c1ad19a5437ed5b554ca7b77ece1c3a7049a6bf19951860debd2934051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3d6e5c1ad19a5437ed5b554ca7b77ece1c3a7049a6bf19951860debd2934051", kill_on_drop: false }`
[INFO] [stdout] c3d6e5c1ad19a5437ed5b554ca7b77ece1c3a7049a6bf19951860debd2934051