[INFO] cloning repository https://github.com/cct124/image-png-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cct124/image-png-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcct124%2Fimage-png-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcct124%2Fimage-png-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 35b7d275b0baf89a04ec2ab115460a45e9015abe
[INFO] checking cct124/image-png-demo against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcct124%2Fimage-png-demo" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cct124/image-png-demo on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cct124/image-png-demo
[INFO] finished tweaking git repo https://github.com/cct124/image-png-demo
[INFO] tweaked toml for git repo https://github.com/cct124/image-png-demo written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cct124/image-png-demo 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded noisy_float v0.2.0
[INFO] [stderr]   Downloaded imagequant v4.0.4
[INFO] [stderr]   Downloaded rgb v0.8.34
[INFO] [stderr]   Downloaded bytemuck v1.12.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80f89cd6be852efa5922fcaf076ae6a972f82a4a696115c63bd0aaed4a10c7ce
[INFO] running `Command { std: "docker" "start" "-a" "80f89cd6be852efa5922fcaf076ae6a972f82a4a696115c63bd0aaed4a10c7ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80f89cd6be852efa5922fcaf076ae6a972f82a4a696115c63bd0aaed4a10c7ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80f89cd6be852efa5922fcaf076ae6a972f82a4a696115c63bd0aaed4a10c7ce", kill_on_drop: false }`
[INFO] [stdout] 80f89cd6be852efa5922fcaf076ae6a972f82a4a696115c63bd0aaed4a10c7ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bde87419ed5a9cf62a744cfc04e4345053338304b8b4a36768a58380ee62b52
[INFO] running `Command { std: "docker" "start" "-a" "2bde87419ed5a9cf62a744cfc04e4345053338304b8b4a36768a58380ee62b52", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking bytemuck v1.12.2
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking rgb v0.8.34
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking png v0.17.7
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking imagequant v4.0.4
[INFO] [stderr]     Checking image-png-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_indexes.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_rgb.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `imagequant` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use imagequant;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `imagequant` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rgb` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rgb;
[INFO] [stdout]   |     ^^^ the item `rgb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_indexes.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_rgb.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `imagequant` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use imagequant;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `imagequant` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rgb` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rgb;
[INFO] [stdout]   |     ^^^ the item `rgb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/example/decoder_rbg_apng.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let info = reader.info();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/example/decoder_rbg_apng.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let info = reader.info();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decoder_indexes` is never used
[INFO] [stdout]  --> src/example/decoder_indexes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn decoder_indexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_indexes_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rbg_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rgb.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` is never used
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoder_rgb` is never used
[INFO] [stdout]  --> src/example/encoder_rgb.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoder_rgb(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `png_handle` is never used
[INFO] [stdout]   --> src/example/imagequant_handle.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn png_handle(path: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apng_handle` is never used
[INFO] [stdout]    --> src/example/imagequant_handle.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn apng_handle(path: &str) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]  --> src/example/decoder_rgb.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]   |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` should have a snake case name
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `encoder_indexes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_indexes.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_rgb.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decoder_indexes` is never used
[INFO] [stdout]  --> src/example/decoder_indexes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn decoder_indexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_indexes_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rbg_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rgb.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` is never used
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoder_rgb` is never used
[INFO] [stdout]  --> src/example/encoder_rgb.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoder_rgb(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `png_handle` is never used
[INFO] [stdout]   --> src/example/imagequant_handle.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn png_handle(path: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apng_handle` is never used
[INFO] [stdout]    --> src/example/imagequant_handle.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn apng_handle(path: &str) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]  --> src/example/decoder_rgb.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]   |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` should have a snake case name
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `encoder_indexes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_indexes.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_rgb.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.01s
[INFO] running `Command { std: "docker" "inspect" "2bde87419ed5a9cf62a744cfc04e4345053338304b8b4a36768a58380ee62b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bde87419ed5a9cf62a744cfc04e4345053338304b8b4a36768a58380ee62b52", kill_on_drop: false }`
[INFO] [stdout] 2bde87419ed5a9cf62a744cfc04e4345053338304b8b4a36768a58380ee62b52
[INFO] checking cct124/image-png-demo against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcct124%2Fimage-png-demo" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cct124/image-png-demo on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cct124/image-png-demo
[INFO] finished tweaking git repo https://github.com/cct124/image-png-demo
[INFO] tweaked toml for git repo https://github.com/cct124/image-png-demo written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cct124/image-png-demo 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 850890fe83ac9b7f6e827b1960f7edc9e9fdc19279afd0524ab2c9bf6d040b90
[INFO] running `Command { std: "docker" "start" "-a" "850890fe83ac9b7f6e827b1960f7edc9e9fdc19279afd0524ab2c9bf6d040b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "850890fe83ac9b7f6e827b1960f7edc9e9fdc19279afd0524ab2c9bf6d040b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "850890fe83ac9b7f6e827b1960f7edc9e9fdc19279afd0524ab2c9bf6d040b90", kill_on_drop: false }`
[INFO] [stdout] 850890fe83ac9b7f6e827b1960f7edc9e9fdc19279afd0524ab2c9bf6d040b90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 762941c09da652ecf4c91ceaa8110967ff89e17357915cd9b8f356f58f708f94
[INFO] running `Command { std: "docker" "start" "-a" "762941c09da652ecf4c91ceaa8110967ff89e17357915cd9b8f356f58f708f94", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.11
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]     Checking bytemuck v1.12.2
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking rgb v0.8.34
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking png v0.17.7
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rayon-core v1.9.3
[INFO] [stderr]     Checking noisy_float v0.2.0
[INFO] [stderr]     Checking rayon v1.5.3
[INFO] [stderr]     Checking imagequant v4.0.4
[INFO] [stderr]     Checking image-png-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_indexes.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_rgb.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `imagequant` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use imagequant;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `imagequant` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rgb` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rgb;
[INFO] [stdout]   |     ^^^ the item `rgb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_indexes.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/encoder_rgb.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `imagequant` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use imagequant;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `imagequant` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `png` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use png;
[INFO] [stdout]   |     ^^^ the item `png` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rgb` is imported redundantly
[INFO] [stdout]  --> src/example/imagequant_handle.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rgb;
[INFO] [stdout]   |     ^^^ the item `rgb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/example/decoder_rbg_apng.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let info = reader.info();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `info`
[INFO] [stdout]   --> src/example/decoder_rbg_apng.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let info = reader.info();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_info`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decoder_indexes` is never used
[INFO] [stdout]  --> src/example/decoder_indexes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn decoder_indexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_indexes_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rbg_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decoder_indexes` is never used
[INFO] [stdout]  --> src/example/decoder_indexes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn decoder_indexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rgb.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` is never used
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_indexes_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoder_rgb` is never used
[INFO] [stdout]  --> src/example/encoder_rgb.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoder_rgb(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rbg_apng.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handel` is never used
[INFO] [stdout]  --> src/example/decoder_rgb.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn handel(path: &str) {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `png_handle` is never used
[INFO] [stdout]   --> src/example/imagequant_handle.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn png_handle(path: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` is never used
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apng_handle` is never used
[INFO] [stdout]    --> src/example/imagequant_handle.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn apng_handle(path: &str) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoder_rgb` is never used
[INFO] [stdout]  --> src/example/encoder_rgb.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoder_rgb(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `png_handle` is never used
[INFO] [stdout]   --> src/example/imagequant_handle.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn png_handle(path: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `apng_handle` is never used
[INFO] [stdout]    --> src/example/imagequant_handle.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn apng_handle(path: &str) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]  --> src/example/decoder_rgb.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]   |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` should have a snake case name
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `encoder_indexes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]  --> src/example/decoder_rgb.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]   |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_indexes.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `encoderIndexes` should have a snake case name
[INFO] [stdout]  --> src/example/encoder_indexes.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn encoderIndexes(path: &str) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `encoder_indexes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_indexes.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_rgb.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `outputInfo` should have a snake case name
[INFO] [stdout]   --> src/example/encoder_rgb.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let outputInfo = reader.next_frame(&mut buf).unwrap();
[INFO] [stdout]    |         ^^^^^^^^^^ help: convert the identifier to snake case: `output_info`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.45s
[INFO] running `Command { std: "docker" "inspect" "762941c09da652ecf4c91ceaa8110967ff89e17357915cd9b8f356f58f708f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "762941c09da652ecf4c91ceaa8110967ff89e17357915cd9b8f356f58f708f94", kill_on_drop: false }`
[INFO] [stdout] 762941c09da652ecf4c91ceaa8110967ff89e17357915cd9b8f356f58f708f94