[INFO] cloning repository https://github.com/ashwinp15/rust-png-cryptex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ashwinp15/rust-png-cryptex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashwinp15%2Frust-png-cryptex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashwinp15%2Frust-png-cryptex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 531cb4180aed267b544795b3843e2352a2de0582
[INFO] checking ashwinp15/rust-png-cryptex against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashwinp15%2Frust-png-cryptex" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ashwinp15/rust-png-cryptex
[INFO] finished tweaking git repo https://github.com/ashwinp15/rust-png-cryptex
[INFO] tweaked toml for git repo https://github.com/ashwinp15/rust-png-cryptex written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ashwinp15/rust-png-cryptex on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ashwinp15/rust-png-cryptex 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" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67c6c8f5648c034fa3c6260c871e131e6d9c658d61e998a2a557922c1c34c4ed
[INFO] running `Command { std: "docker" "start" "-a" "67c6c8f5648c034fa3c6260c871e131e6d9c658d61e998a2a557922c1c34c4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67c6c8f5648c034fa3c6260c871e131e6d9c658d61e998a2a557922c1c34c4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67c6c8f5648c034fa3c6260c871e131e6d9c658d61e998a2a557922c1c34c4ed", kill_on_drop: false }`
[INFO] [stdout] 67c6c8f5648c034fa3c6260c871e131e6d9c658d61e998a2a557922c1c34c4ed
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e94eccf9a6ad3619d355459224eca5375ba1816b9f0a0b2095a3bf167262689
[INFO] running `Command { std: "docker" "start" "-a" "3e94eccf9a6ad3619d355459224eca5375ba1816b9f0a0b2095a3bf167262689", kill_on_drop: false }`
[INFO] [stderr]     Checking crc v3.2.1
[INFO] [stderr]     Checking rust-png-cryptex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `from_utf8`
[INFO] [stdout]  --> src/chunk_type.rs:1:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{result::Result, str::{FromStr, from_utf8}, ops::BitAnd, fmt::Display};
[INFO] [stdout]   |                                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `from_utf8`
[INFO] [stdout]  --> src/chunk_type.rs:1:42
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{result::Result, str::{FromStr, from_utf8}, ops::BitAnd, fmt::Display};
[INFO] [stdout]   |                                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> src/png.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn append_chunk(&mut self, chunk: Chunk) {}
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk` is never constructed
[INFO] [stdout]  --> src/chunk.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Chunk {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/chunk.rs:68:12
[INFO] [stdout]     |
[INFO] [stdout]  66 | impl Chunk {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout]  67 |
[INFO] [stdout]  68 |     pub fn new(chunk_type: ChunkType, data: Vec<u8>) -> Chunk {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  81 |     pub fn length(&self) -> u32 {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  85 |     pub fn chunk_type(&self) -> &ChunkType {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  89 |     pub fn data(&self) -> &[u8] {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout]  93 |     pub fn crc(&self) -> u32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  97 |     pub fn data_as_string(&self) -> Result<String, FromUtf8Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     pub fn as_bytes(&self) -> Vec<u8> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChunkType` is never constructed
[INFO] [stdout]  --> src/chunk_type.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct ChunkType {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fifth_bit_to_bool` is never used
[INFO] [stdout]   --> src/chunk_type.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn fifth_bit_to_bool(number: &u8) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `bytes`, `is_valid`, `is_critical`, `is_public`, `is_reserved_bit_valid`, and `is_safe_to_copy` are never used
[INFO] [stdout]   --> src/chunk_type.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 75 | impl ChunkType {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 76 |     pub fn bytes(&self) -> [u8; 4] {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn is_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |     pub fn is_critical(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     pub fn is_public(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92 |     pub fn is_reserved_bit_valid(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |     pub fn is_safe_to_copy(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Png` is never constructed
[INFO] [stdout]  --> src/png.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Png {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ChunkError` is never used
[INFO] [stdout]   --> src/png.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type ChunkError = &'static str;
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `STANDARD_HEADER`, `from_chunks`, `append_chunk`, `chunks`, and `chunk_by_type` are never used
[INFO] [stdout]   --> src/png.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Png {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout] 15 |     const STANDARD_HEADER: [u8; 8] = [137, 80, 78, 71, 13, 10, 26, 10];
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 16 |
[INFO] [stdout] 17 |     fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn append_chunk(&mut self, chunk: Chunk) {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn chunks(&self) -> &[Chunk] {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn chunk_by_type(&self, chunk_type: &str) -> Option<&Chunk> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]   --> src/png.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn append_chunk(&mut self, chunk: Chunk) {}
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `data` is never used
[INFO] [stdout]   --> src/chunk.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Chunk {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     pub fn data(&self) -> &[u8] {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `header` is never read
[INFO] [stdout]  --> src/png.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Png {
[INFO] [stdout]   |        --- field in this struct
[INFO] [stdout] 8 |     header: [u8; 8],
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PNG_FILE` is never used
[INFO] [stdout]    --> src/png.rs:243:11
[INFO] [stdout]     |
[INFO] [stdout] 243 |     const PNG_FILE: [u8; 4803] = [
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "3e94eccf9a6ad3619d355459224eca5375ba1816b9f0a0b2095a3bf167262689", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e94eccf9a6ad3619d355459224eca5375ba1816b9f0a0b2095a3bf167262689", kill_on_drop: false }`
[INFO] [stdout] 3e94eccf9a6ad3619d355459224eca5375ba1816b9f0a0b2095a3bf167262689
