[INFO] cloning repository https://github.com/andresovela/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/andresovela/png-message" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandresovela%2Fpng-message", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandresovela%2Fpng-message'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 829d1397ac4f66bc4330d0ef025e552a4f4c54de
[INFO] checking andresovela/png-message against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandresovela%2Fpng-message" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andresovela/png-message on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andresovela/png-message
[INFO] finished tweaking git repo https://github.com/andresovela/png-message
[INFO] tweaked toml for git repo https://github.com/andresovela/png-message written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/andresovela/png-message already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7aaea7dcc8f39f8aa655355cc909cd5d04c1385e47ca9d992a0766315cbe561a
[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" "7aaea7dcc8f39f8aa655355cc909cd5d04c1385e47ca9d992a0766315cbe561a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7aaea7dcc8f39f8aa655355cc909cd5d04c1385e47ca9d992a0766315cbe561a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aaea7dcc8f39f8aa655355cc909cd5d04c1385e47ca9d992a0766315cbe561a", kill_on_drop: false }`
[INFO] [stdout] 7aaea7dcc8f39f8aa655355cc909cd5d04c1385e47ca9d992a0766315cbe561a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 8d7e96a61e0aed5d3ffeb90c7f9e98d6917e4247b9c6ac392a1203e83a24e57d
[INFO] running `Command { std: "docker" "start" "-a" "8d7e96a61e0aed5d3ffeb90c7f9e98d6917e4247b9c6ac392a1203e83a24e57d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling fehler-macros v1.0.0
[INFO] [stderr]     Checking fehler v1.0.0
[INFO] [stderr]     Checking png-msg v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/chunk.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn new(chunk_type: ChunkType, data: Vec<u8>) -> Self {
[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: `length`
[INFO] [stdout]   --> src/chunk.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn length(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chunk_type`
[INFO] [stdout]   --> src/chunk.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn chunk_type(&self) -> &ChunkType {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `data`
[INFO] [stdout]   --> src/chunk.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn data(&self) -> &[u8] {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `crc`
[INFO] [stdout]   --> src/chunk.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn crc(&self) -> u32 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `data_as_string`
[INFO] [stdout]   --> src/chunk.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn data_as_string(&self) -> Result<String, FromUtf8Error> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_bytes`
[INFO] [stdout]   --> src/chunk.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn as_bytes(&self) -> Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bytes`
[INFO] [stdout]   --> src/chunk_type.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn bytes(&self) -> &[u8; 4] {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_valid`
[INFO] [stdout]   --> src/chunk_type.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn is_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:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     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:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn is_public(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_reserved_bit_valid`
[INFO] [stdout]   --> src/chunk_type.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn is_reserved_bit_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:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn is_safe_to_copy(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `header`
[INFO] [stdout]  --> src/png.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     header: [u8; 8],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `chunks`
[INFO] [stdout]  --> src/png.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     chunks: Vec<Chunk>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_chunks`
[INFO] [stdout]   --> src/png.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `append_chunk`
[INFO] [stdout]   --> src/png.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn append_chunk(&mut self, chunk: Chunk) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove_chunk`
[INFO] [stdout]   --> src/png.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn remove_chunk(&mut self, chunk_type: &str) -> Result<Chunk, &'static str> {
[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: associated function is never used: `chunks`
[INFO] [stdout]   --> src/png.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn chunks(&self) -> &[Chunk] {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `chunk_by_type`
[INFO] [stdout]   --> src/png.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn chunk_by_type(&self, chunk_type: &str) -> Option<&Chunk> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `as_bytes`
[INFO] [stdout]   --> src/png.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn as_bytes(&self) -> Vec<u8> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `data`
[INFO] [stdout]   --> src/chunk.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub 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 21.54s
[INFO] running `Command { std: "docker" "inspect" "8d7e96a61e0aed5d3ffeb90c7f9e98d6917e4247b9c6ac392a1203e83a24e57d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d7e96a61e0aed5d3ffeb90c7f9e98d6917e4247b9c6ac392a1203e83a24e57d", kill_on_drop: false }`
[INFO] [stdout] 8d7e96a61e0aed5d3ffeb90c7f9e98d6917e4247b9c6ac392a1203e83a24e57d