[INFO] cloning repository https://github.com/overoxidize/png-dec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/overoxidize/png-dec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foveroxidize%2Fpng-dec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foveroxidize%2Fpng-dec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 767b212d47ee888ef4786e0a9d195490efdeb113
[INFO] checking overoxidize/png-dec against master#4d1bd0db7f489b22c6d8aa2385937a95412c015b for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foveroxidize%2Fpng-dec" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/overoxidize/png-dec on toolchain 4d1bd0db7f489b22c6d8aa2385937a95412c015b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/overoxidize/png-dec
[INFO] finished tweaking git repo https://github.com/overoxidize/png-dec
[INFO] tweaked toml for git repo https://github.com/overoxidize/png-dec written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/overoxidize/png-dec already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking overoxidize/png-dec against try#785364c7e5e0804473a3fddfb579798ea14e3493 for pr-114682
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foveroxidize%2Fpng-dec" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/overoxidize/png-dec on toolchain 785364c7e5e0804473a3fddfb579798ea14e3493
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/overoxidize/png-dec
[INFO] finished tweaking git repo https://github.com/overoxidize/png-dec
[INFO] tweaked toml for git repo https://github.com/overoxidize/png-dec written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/overoxidize/png-dec already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d344e8cdcb32b52a5b13110e7c740550ce4baf86e860fedf4c4896d132494ef1
[INFO] running `Command { std: "docker" "start" "-a" "d344e8cdcb32b52a5b13110e7c740550ce4baf86e860fedf4c4896d132494ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d344e8cdcb32b52a5b13110e7c740550ce4baf86e860fedf4c4896d132494ef1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d344e8cdcb32b52a5b13110e7c740550ce4baf86e860fedf4c4896d132494ef1", kill_on_drop: false }`
[INFO] [stdout] d344e8cdcb32b52a5b13110e7c740550ce4baf86e860fedf4c4896d132494ef1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75f64b2695eeb46350b4de5abfbc4de7347b59637e543aa266dae505cb52c762
[INFO] running `Command { std: "docker" "start" "-a" "75f64b2695eeb46350b4de5abfbc4de7347b59637e543aa266dae505cb52c762", kill_on_drop: false }`
[INFO] [stderr]     Checking png-dec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `try_from`
[INFO] [stdout]   --> src/chunk_type.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl TryFrom<[u8; 4]> for ChunkType {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `try_from` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement the missing item: `fn try_from(_: [u8; 4]) -> std::result::Result<Self, <Self as TryFrom<[u8; 4]>>::Error> { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() -> Result<()> {
[INFO] [stdout]    |    ----      ^^^^^^^^^^ expected `Result<(), Box<dyn Error>>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `std::result::Result<(), Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `png-dec` (bin "png-dec") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `try_from`
[INFO] [stdout]   --> src/chunk_type.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl TryFrom<[u8; 4]> for ChunkType {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `try_from` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement the missing item: `fn try_from(_: [u8; 4]) -> std::result::Result<Self, <Self as TryFrom<[u8; 4]>>::Error> { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `bytes` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:32:41
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- method `bytes` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 32 |             assert_eq!(expected, actual.bytes());
[INFO] [stdout]    |                                         ^^^^^ method not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `bytes`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `std::io::Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:38:37
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |             let actual = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                     ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:44:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 44 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:50:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 50 |             let chunk = ChunkType::from_str("ruSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:56:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 56 |             let chunk = ChunkType::from_str("RUSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:62:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 62 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:68:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:74:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 74 |             let chunk = ChunkType::from_str("Rust").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:80:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 80 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:86:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 86 |             let chunk = ChunkType::from_str("RuST").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:92:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 92 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]   --> src/chunk_type.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 5  | struct ChunkType {
[INFO] [stdout]    | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 98 |             let chunk = ChunkType::from_str("Rust").unwrap();
[INFO] [stdout]    |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]    = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]            candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]    --> src/chunk_type.rs:101:36
[INFO] [stdout]     |
[INFO] [stdout] 5   | struct ChunkType {
[INFO] [stdout]     | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 101 |             let chunk = ChunkType::from_str("Ru1t");
[INFO] [stdout]     |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `from_str` found for struct `chunk_type::ChunkType` in the current scope
[INFO] [stdout]    --> src/chunk_type.rs:107:36
[INFO] [stdout]     |
[INFO] [stdout] 5   | struct ChunkType {
[INFO] [stdout]     | ---------------- function or associated item `from_str` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 107 |             let chunk = ChunkType::from_str("RuSt").unwrap();
[INFO] [stdout]     |                                    ^^^^^^^^ function or associated item not found in `ChunkType`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `from_str`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `FromStr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `chunk_type::ChunkType: FromStr` is not satisfied
[INFO] [stdout]    --> src/chunk_type.rs:114:43
[INFO] [stdout]     |
[INFO] [stdout] 114 |             let chunk_type_2: ChunkType = FromStr::from_str("RuSt").unwrap();
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^ the trait `FromStr` is not implemented for `chunk_type::ChunkType`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `FromStr`:
[INFO] [stdout]               bool
[INFO] [stdout]               char
[INFO] [stdout]               isize
[INFO] [stdout]               i8
[INFO] [stdout]               i16
[INFO] [stdout]               i32
[INFO] [stdout]               i64
[INFO] [stdout]               i128
[INFO] [stdout]             and 29 others
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `chunk_type::ChunkType: FromStr` is not satisfied
[INFO] [stdout]    --> src/chunk_type.rs:114:43
[INFO] [stdout]     |
[INFO] [stdout] 114 |             let chunk_type_2: ChunkType = FromStr::from_str("RuSt").unwrap();
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromStr` is not implemented for `chunk_type::ChunkType`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following other types implement trait `FromStr`:
[INFO] [stdout]               bool
[INFO] [stdout]               char
[INFO] [stdout]               isize
[INFO] [stdout]               i8
[INFO] [stdout]               i16
[INFO] [stdout]               i32
[INFO] [stdout]               i64
[INFO] [stdout]               i128
[INFO] [stdout]             and 29 others
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `chunk_type::ChunkType` doesn't implement `std::fmt::Display`
[INFO] [stdout]    --> src/chunk_type.rs:115:47
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let _chunk_string = format!("{}", chunk_type_1);
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ `chunk_type::ChunkType` cannot be formatted with the default formatter
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `std::fmt::Display` is not implemented for `chunk_type::ChunkType`
[INFO] [stdout]     = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout]     = note: this error originates in the macro `$crate::__export::format_args` which comes from the expansion of the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() -> Result<()> {
[INFO] [stdout]    |    ----      ^^^^^^^^^^ expected `Result<(), Box<dyn Error>>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `std::result::Result<(), Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 19 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0277, E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `png-dec` (bin "png-dec" test) due to 20 previous errors
[INFO] running `Command { std: "docker" "inspect" "75f64b2695eeb46350b4de5abfbc4de7347b59637e543aa266dae505cb52c762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75f64b2695eeb46350b4de5abfbc4de7347b59637e543aa266dae505cb52c762", kill_on_drop: false }`
[INFO] [stdout] 75f64b2695eeb46350b4de5abfbc4de7347b59637e543aa266dae505cb52c762
