[INFO] fetching crate png_pong 0.8.2...
[INFO] testing png_pong-0.8.2 against 1.76.0 for beta-1.77-1
[INFO] extracting crate png_pong 0.8.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate png_pong 0.8.2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate png_pong 0.8.2
[INFO] finished tweaking crates.io crate png_pong 0.8.2
[INFO] tweaked toml for crates.io crate png_pong 0.8.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate png_pong 0.8.2 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cast v0.2.6
[INFO] [stderr]   Downloaded pix v0.13.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d53f23df7f4c4d60a3da880c0d90711779cfc8bba82022ff8b1a38df36afe084
[INFO] running `Command { std: "docker" "start" "-a" "d53f23df7f4c4d60a3da880c0d90711779cfc8bba82022ff8b1a38df36afe084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d53f23df7f4c4d60a3da880c0d90711779cfc8bba82022ff8b1a38df36afe084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d53f23df7f4c4d60a3da880c0d90711779cfc8bba82022ff8b1a38df36afe084", kill_on_drop: false }`
[INFO] [stdout] d53f23df7f4c4d60a3da880c0d90711779cfc8bba82022ff8b1a38df36afe084
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afff38e33125bc159d91b05f743dbab2a5cea395de0c3aadcd2f0f8869980459
[INFO] running `Command { std: "docker" "start" "-a" "afff38e33125bc159d91b05f743dbab2a5cea395de0c3aadcd2f0f8869980459", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pix v0.13.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling png_pong v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 3.26s
[INFO] running `Command { std: "docker" "inspect" "afff38e33125bc159d91b05f743dbab2a5cea395de0c3aadcd2f0f8869980459", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afff38e33125bc159d91b05f743dbab2a5cea395de0c3aadcd2f0f8869980459", kill_on_drop: false }`
[INFO] [stdout] afff38e33125bc159d91b05f743dbab2a5cea395de0c3aadcd2f0f8869980459
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 146315b2b3f0d574124face87c2c68bbde413853819c5a73689844f2700dede6
[INFO] running `Command { std: "docker" "start" "-a" "146315b2b3f0d574124face87c2c68bbde413853819c5a73689844f2700dede6", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.4
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling plotters-backend v0.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling plotters-svg v0.3.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling plotters v0.3.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling png_pong v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 22.32s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "146315b2b3f0d574124face87c2c68bbde413853819c5a73689844f2700dede6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "146315b2b3f0d574124face87c2c68bbde413853819c5a73689844f2700dede6", kill_on_drop: false }`
[INFO] [stdout] 146315b2b3f0d574124face87c2c68bbde413853819c5a73689844f2700dede6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ea1b9e9f25b9f5cc521038c8b1f401861815dd1a794a0bae37e19e5f4fa2dbac
[INFO] running `Command { std: "docker" "start" "-a" "ea1b9e9f25b9f5cc521038c8b1f401861815dd1a794a0bae37e19e5f4fa2dbac", kill_on_drop: false }`
[INFO] [stderr] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stderr]   --> src/decode/steps.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | struct TextEntry {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 28 |     text: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 29 |     langtag: Option<String>,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 30 |     transkey: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stderr]   --> src/decode/steps.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub struct Steps<R: Read> {
[INFO] [stderr]    |            ----- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 38 |     has_decoded: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |     is_animation: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 43 |     // Is IDAT part of the animation?
[INFO] [stderr] 44 |     idat_anim: bool,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `coldepth` and `header` are never read
[INFO] [stderr]    --> src/encode/step_enc.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 117 | pub struct StepEnc<W: Write> {
[INFO] [stderr]     |            ------- fields in this struct
[INFO] [stderr] 118 |     encoder: ChunkEnc<W>,
[INFO] [stderr] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 120 |     header: Option<ImageHeader>,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `png_pong` (lib) generated 3 warnings
[INFO] [stderr] warning: `png_pong` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 0.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/png_pong-aa369b4d7a621d52)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests png_pong
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 21) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 21) stdout ----
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at src/lib.rs:13:41:
[INFO] [stdout] Failed to save image: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5597a127cc46 - std::backtrace_rs::backtrace::libunwind::trace::hbee8a7973eeb6c93
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x5597a127cc46 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8ac75eea3aa6899
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5597a127cc46 - std::sys_common::backtrace::_print_fmt::hc7f3e3b5298b1083
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x5597a127cc46 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbb235daedd7c6190
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x5597a129bb40 - core::fmt::rt::Argument::fmt::h76c38a80d925a410
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x5597a129bb40 - core::fmt::write::h3ed6aeaa977c8e45
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x5597a127b0ff - std::io::Write::write_fmt::h78b18af5775fedb5
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:1810:15
[INFO] [stdout]    7:     0x5597a127ca24 - std::sys_common::backtrace::_print::h5d645a07e0fcfdbb
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x5597a127ca24 - std::sys_common::backtrace::print::h85035a511aafe7a8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x5597a127df87 - std::panicking::default_hook::{{closure}}::hcce8cea212785a25
[INFO] [stdout]   10:     0x5597a127dce9 - std::panicking::default_hook::hf5fcb0f213fe709a
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:292:9
[INFO] [stdout]   11:     0x5597a127e418 - std::panicking::rust_panic_with_hook::h095fccf1dc9379ee
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:779:13
[INFO] [stdout]   12:     0x5597a127e2f2 - std::panicking::begin_panic_handler::{{closure}}::h032ba12139b353db
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:657:13
[INFO] [stdout]   13:     0x5597a127d146 - std::sys_common::backtrace::__rust_end_short_backtrace::h9259bc2ff8fd0f76
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   14:     0x5597a127e050 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:645:5
[INFO] [stdout]   15:     0x5597a1232035 - core::panicking::panic_fmt::h784f20a50eaab275
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:72:14
[INFO] [stdout]   16:     0x5597a12324a3 - core::result::unwrap_failed::h03d8a5018196e1cd
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/result.rs:1649:5
[INFO] [stdout]   17:     0x5597a1237a03 - core::result::Result<T,E>::expect::h4ce3f20b093054b0
[INFO] [stdout]   18:     0x5597a124ee4e - rust_out::main::_doctest_main_src_lib_rs_21_0::h96f194c9351ae792
[INFO] [stdout]   19:     0x5597a124ebd6 - rust_out::main::h7d13ed1f0b74fb4f
[INFO] [stdout]   20:     0x5597a1235713 - core::ops::function::FnOnce::call_once::h9310bc2590e31970
[INFO] [stdout]   21:     0x5597a12334d6 - std::sys_common::backtrace::__rust_begin_short_backtrace::haeb71db878654b8a
[INFO] [stdout]   22:     0x5597a1234309 - std::rt::lang_start::{{closure}}::h3fc7e49d09688110
[INFO] [stdout]   23:     0x5597a12783f1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h37600b1e5eea4ecd
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:284:13
[INFO] [stdout]   24:     0x5597a12783f1 - std::panicking::try::do_call::hb4bda49fa13a0c2b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   25:     0x5597a12783f1 - std::panicking::try::h8bbf75149211aaaa
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   26:     0x5597a12783f1 - std::panic::catch_unwind::h8c78ec68ebea34cb
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   27:     0x5597a12783f1 - std::rt::lang_start_internal::{{closure}}::hffdf44a19fd9e220
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/rt.rs:148:48
[INFO] [stdout]   28:     0x5597a12783f1 - std::panicking::try::do_call::hcb3194972c74716d
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   29:     0x5597a12783f1 - std::panicking::try::hcdc6892c5f0dba4c
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   30:     0x5597a12783f1 - std::panic::catch_unwind::h4910beb4573f4776
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x5597a12783f1 - std::rt::lang_start_internal::h6939038e2873596b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/rt.rs:148:20
[INFO] [stdout]   32:     0x5597a12342e7 - std::rt::lang_start::hd109d716ba1a5b01
[INFO] [stdout]   33:     0x5597a124f075 - main
[INFO] [stdout]   34:     0x7fde93927d90 - <unknown>
[INFO] [stdout]   35:     0x7fde93927e40 - __libc_start_main
[INFO] [stdout]   36:     0x5597a1232765 - _start
[INFO] [stdout]   37:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 21)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.29s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "ea1b9e9f25b9f5cc521038c8b1f401861815dd1a794a0bae37e19e5f4fa2dbac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea1b9e9f25b9f5cc521038c8b1f401861815dd1a794a0bae37e19e5f4fa2dbac", kill_on_drop: false }`
[INFO] [stdout] ea1b9e9f25b9f5cc521038c8b1f401861815dd1a794a0bae37e19e5f4fa2dbac
[INFO] testing png_pong-0.8.2 against beta-2024-02-10 for beta-1.77-1
[INFO] extracting crate png_pong 0.8.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate png_pong 0.8.2 on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate png_pong 0.8.2
[INFO] finished tweaking crates.io crate png_pong 0.8.2
[INFO] tweaked toml for crates.io crate png_pong 0.8.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate png_pong 0.8.2 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" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98281d355563fdf1dc68236ea45574e8169b52e6e6e87412b7ab0e23dee93251
[INFO] running `Command { std: "docker" "start" "-a" "98281d355563fdf1dc68236ea45574e8169b52e6e6e87412b7ab0e23dee93251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98281d355563fdf1dc68236ea45574e8169b52e6e6e87412b7ab0e23dee93251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98281d355563fdf1dc68236ea45574e8169b52e6e6e87412b7ab0e23dee93251", kill_on_drop: false }`
[INFO] [stdout] 98281d355563fdf1dc68236ea45574e8169b52e6e6e87412b7ab0e23dee93251
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48d425578fe79faaf38f70c181ae2aff4d0e11d9dc114fd9c9613283d3c42bf0
[INFO] running `Command { std: "docker" "start" "-a" "48d425578fe79faaf38f70c181ae2aff4d0e11d9dc114fd9c9613283d3c42bf0", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling pix v0.13.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling png_pong v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 1.33s
[INFO] running `Command { std: "docker" "inspect" "48d425578fe79faaf38f70c181ae2aff4d0e11d9dc114fd9c9613283d3c42bf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48d425578fe79faaf38f70c181ae2aff4d0e11d9dc114fd9c9613283d3c42bf0", kill_on_drop: false }`
[INFO] [stdout] 48d425578fe79faaf38f70c181ae2aff4d0e11d9dc114fd9c9613283d3c42bf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-02-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0800d6485272a88909772039361b668feb1e8b7c2c060893ff745a28d9b8982b
[INFO] running `Command { std: "docker" "start" "-a" "0800d6485272a88909772039361b668feb1e8b7c2c060893ff745a28d9b8982b", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.4
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling cast v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling plotters-backend v0.3.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling plotters-svg v0.3.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling plotters v0.3.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling png_pong v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stdout]   --> src/decode/steps.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct TextEntry {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 29 |     langtag: Option<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 30 |     transkey: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stdout]   --> src/decode/steps.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Steps<R: Read> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 38 |     has_decoded: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     is_animation: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 43 |     // Is IDAT part of the animation?
[INFO] [stdout] 44 |     idat_anim: bool,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coldepth` and `header` are never read
[INFO] [stdout]    --> src/encode/step_enc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | pub struct StepEnc<W: Write> {
[INFO] [stdout]     |            ------- fields in this struct
[INFO] [stdout] 118 |     encoder: ChunkEnc<W>,
[INFO] [stdout] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 120 |     header: Option<ImageHeader>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 19.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "0800d6485272a88909772039361b668feb1e8b7c2c060893ff745a28d9b8982b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0800d6485272a88909772039361b668feb1e8b7c2c060893ff745a28d9b8982b", kill_on_drop: false }`
[INFO] [stdout] 0800d6485272a88909772039361b668feb1e8b7c2c060893ff745a28d9b8982b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-02-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0881124501c0cd5cb6fcdd3488a6b991e2531a46610579c8ce0bd797e90662c3
[INFO] running `Command { std: "docker" "start" "-a" "0881124501c0cd5cb6fcdd3488a6b991e2531a46610579c8ce0bd797e90662c3", kill_on_drop: false }`
[INFO] [stderr] warning: fields `text`, `langtag`, and `transkey` are never read
[INFO] [stderr]   --> src/decode/steps.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | struct TextEntry {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 28 |     text: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 29 |     langtag: Option<String>,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 30 |     transkey: Option<String>,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TextEntry` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `has_decoded`, `is_animation`, and `idat_anim` are never read
[INFO] [stderr]   --> src/decode/steps.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub struct Steps<R: Read> {
[INFO] [stderr]    |            ----- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 38 |     has_decoded: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |     is_animation: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 43 |     // Is IDAT part of the animation?
[INFO] [stderr] 44 |     idat_anim: bool,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Steps` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `coldepth` and `header` are never read
[INFO] [stderr]    --> src/encode/step_enc.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 117 | pub struct StepEnc<W: Write> {
[INFO] [stderr]     |            ------- fields in this struct
[INFO] [stderr] 118 |     encoder: ChunkEnc<W>,
[INFO] [stderr] 119 |     coldepth: Option<(ColorType, u32)>,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 120 |     header: Option<ImageHeader>,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `StepEnc` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `png_pong` (lib) generated 3 warnings
[INFO] [stderr] warning: `png_pong` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [optimized + debuginfo] target(s) in 0.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/png_pong-f33b6455ffc31788)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests png_pong
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 21) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 21) stdout ----
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at src/lib.rs:13:41:
[INFO] [stdout] Failed to save image: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55b19c935c46 - std::backtrace_rs::backtrace::libunwind::trace::h140b6deb6a45c671
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x55b19c935c46 - std::backtrace_rs::backtrace::trace_unsynchronized::h8450d7e4e9219aed
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55b19c935c46 - std::sys_common::backtrace::_print_fmt::hbd28e5e6c6fc3a3f
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55b19c935c46 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb058f285768cf98e
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55b19c954890 - core::fmt::rt::Argument::fmt::h87dec7a95127da24
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x55b19c954890 - core::fmt::write::h873f89a91a4832db
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x55b19c933f0f - std::io::Write::write_fmt::hc65183f01d14754a
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/io/mod.rs:1846:15
[INFO] [stdout]    7:     0x55b19c935a24 - std::sys_common::backtrace::_print::h7719d1529d9a9e13
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55b19c935a24 - std::sys_common::backtrace::print::haa3afbd0e7947108
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55b19c936f87 - std::panicking::default_hook::{{closure}}::h10e3de2ec0eaff22
[INFO] [stdout]   10:     0x55b19c936ce9 - std::panicking::default_hook::hbdc1b1b7fe073dab
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:292:9
[INFO] [stdout]   11:     0x55b19c937418 - std::panicking::rust_panic_with_hook::hb81692602460473d
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:781:13
[INFO] [stdout]   12:     0x55b19c9372f2 - std::panicking::begin_panic_handler::{{closure}}::h2470593aa2678e9c
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:659:13
[INFO] [stdout]   13:     0x55b19c936146 - std::sys_common::backtrace::__rust_end_short_backtrace::h560bb50225b0562b
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   14:     0x55b19c937044 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:647:5
[INFO] [stdout]   15:     0x55b19c8eb035 - core::panicking::panic_fmt::h29b6f262f6458dc3
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/core/src/panicking.rs:72:14
[INFO] [stdout]   16:     0x55b19c8eb4a3 - core::result::unwrap_failed::h12bc80647957bcdb
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/core/src/result.rs:1649:5
[INFO] [stdout]   17:     0x55b19c8f0be3 - core::result::Result<T,E>::expect::h771944b7b55a3474
[INFO] [stdout]   18:     0x55b19c9080ee - rust_out::main::_doctest_main_src_lib_rs_21_0::hfe47fcbf9969f09e
[INFO] [stdout]   19:     0x55b19c907e76 - rust_out::main::hff4e5118cb484971
[INFO] [stdout]   20:     0x55b19c8ee503 - core::ops::function::FnOnce::call_once::h07035dc3b47525ba
[INFO] [stdout]   21:     0x55b19c8ec4b6 - std::sys_common::backtrace::__rust_begin_short_backtrace::h27e28290e6a5ea6b
[INFO] [stdout]   22:     0x55b19c8ed259 - std::rt::lang_start::{{closure}}::hc9e353f29d6b9183
[INFO] [stdout]   23:     0x55b19c9310d1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hb70d08830a5ade10
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/core/src/ops/function.rs:284:13
[INFO] [stdout]   24:     0x55b19c9310d1 - std::panicking::try::do_call::h22b4f7e5a6651b4a
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:554:40
[INFO] [stdout]   25:     0x55b19c9310d1 - std::panicking::try::hc21d1712e01c2e20
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:518:19
[INFO] [stdout]   26:     0x55b19c9310d1 - std::panic::catch_unwind::h043dedc9b446785f
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panic.rs:142:14
[INFO] [stdout]   27:     0x55b19c9310d1 - std::rt::lang_start_internal::{{closure}}::hd5b437811c37f411
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/rt.rs:148:48
[INFO] [stdout]   28:     0x55b19c9310d1 - std::panicking::try::do_call::hd87c54a927c7af49
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:554:40
[INFO] [stdout]   29:     0x55b19c9310d1 - std::panicking::try::hf94d97659ed75d92
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panicking.rs:518:19
[INFO] [stdout]   30:     0x55b19c9310d1 - std::panic::catch_unwind::h2ddd57de1d25402e
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x55b19c9310d1 - std::rt::lang_start_internal::h7fecc45801af5220
[INFO] [stdout]                                at /rustc/f2048098a1ca42a520e7bed68e321a66edc0a1b1/library/std/src/rt.rs:148:20
[INFO] [stdout]   32:     0x55b19c8ed237 - std::rt::lang_start::h613ce2a20714e78a
[INFO] [stdout]   33:     0x55b19c908315 - main
[INFO] [stdout]   34:     0x7f780d80ad90 - <unknown>
[INFO] [stdout]   35:     0x7f780d80ae40 - __libc_start_main
[INFO] [stdout]   36:     0x55b19c8eb765 - _start
[INFO] [stdout]   37:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 21)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "0881124501c0cd5cb6fcdd3488a6b991e2531a46610579c8ce0bd797e90662c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0881124501c0cd5cb6fcdd3488a6b991e2531a46610579c8ce0bd797e90662c3", kill_on_drop: false }`
[INFO] [stdout] 0881124501c0cd5cb6fcdd3488a6b991e2531a46610579c8ce0bd797e90662c3
