[INFO] cloning repository https://github.com/davidhelbig/pngme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidhelbig/pngme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidhelbig%2Fpngme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidhelbig%2Fpngme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 770c95c880b81ce9c398ada235ef8cb03fa0f672
[INFO] checking davidhelbig/pngme against master#21de280cccb4eb02ead6bf0af40e2355a9136d6f for pr-100043-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidhelbig%2Fpngme" "/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/davidhelbig/pngme on toolchain 21de280cccb4eb02ead6bf0af40e2355a9136d6f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/davidhelbig/pngme
[INFO] finished tweaking git repo https://github.com/davidhelbig/pngme
[INFO] tweaked toml for git repo https://github.com/davidhelbig/pngme written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/davidhelbig/pngme already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b70833000481fde565864dabdd3c8d7de36222cc18d9132feb4eb3e62c877407
[INFO] running `Command { std: "docker" "start" "-a" "b70833000481fde565864dabdd3c8d7de36222cc18d9132feb4eb3e62c877407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b70833000481fde565864dabdd3c8d7de36222cc18d9132feb4eb3e62c877407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b70833000481fde565864dabdd3c8d7de36222cc18d9132feb4eb3e62c877407", kill_on_drop: false }`
[INFO] [stdout] b70833000481fde565864dabdd3c8d7de36222cc18d9132feb4eb3e62c877407
[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" "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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29cf9c0f289c0dc8ff47af8d9ab4497b79918d69baf68099b86087de1703ea89
[INFO] running `Command { std: "docker" "start" "-a" "29cf9c0f289c0dc8ff47af8d9ab4497b79918d69baf68099b86087de1703ea89", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking clap v3.1.5
[INFO] [stderr]     Checking pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/png.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             ref_reader.take(num_bytes_remaining).read_to_end(&mut chunk_bytes)?;
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `std::io::Read::take(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(slice_take)]` to the crate attributes to enable `core::slice::<impl [T]>::take`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `length` is never used
[INFO] [stdout]   --> src/chunk.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub 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 `data` is never used
[INFO] [stdout]   --> src/chunk.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn data(&self) -> &[u8] {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `crc` is never used
[INFO] [stdout]   --> src/chunk.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn crc(&self) -> u32 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_critical` is never used
[INFO] [stdout]   --> src/chunk_type.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn is_critical(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_public` is never used
[INFO] [stdout]   --> src/chunk_type.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn is_public(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `is_safe_to_copy` is never used
[INFO] [stdout]   --> src/chunk_type.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn is_safe_to_copy(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_chunks` is never used
[INFO] [stdout]   --> src/png.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `header` is never used
[INFO] [stdout]   --> src/png.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/png.rs:113:24
[INFO] [stdout]     |
[INFO] [stdout] 113 |             ref_reader.take(num_bytes_remaining).read_to_end(&mut chunk_bytes)?;
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `std::io::Read::take(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(slice_take)]` to the crate attributes to enable `core::slice::<impl [T]>::take`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chunk`
[INFO] [stdout]    --> src/chunk.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 |         let chunk: Chunk = TryFrom::try_from(chunk_data.as_ref()).unwrap();
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_chunk`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `png`
[INFO] [stdout]    --> src/png.rs:288:13
[INFO] [stdout]     |
[INFO] [stdout] 288 |         let png: Png = TryFrom::try_from(bytes.as_ref()).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_png`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `data` is never used
[INFO] [stdout]   --> src/chunk.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 |     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 `header` is never used
[INFO] [stdout]   --> src/png.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.05s
[INFO] running `Command { std: "docker" "inspect" "29cf9c0f289c0dc8ff47af8d9ab4497b79918d69baf68099b86087de1703ea89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29cf9c0f289c0dc8ff47af8d9ab4497b79918d69baf68099b86087de1703ea89", kill_on_drop: false }`
[INFO] [stdout] 29cf9c0f289c0dc8ff47af8d9ab4497b79918d69baf68099b86087de1703ea89