[INFO] fetching crate stega 0.1.0...
[INFO] checking stega-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate stega 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate stega 0.1.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stega 0.1.0
[INFO] finished tweaking crates.io crate stega 0.1.0
[INFO] tweaked toml for crates.io crate stega 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate stega 0.1.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7502699d37ed4a1517293b6ec3f4001504d057abac4dec0a41f6e7d90e02c28
[INFO] running `Command { std: "docker" "start" "-a" "a7502699d37ed4a1517293b6ec3f4001504d057abac4dec0a41f6e7d90e02c28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7502699d37ed4a1517293b6ec3f4001504d057abac4dec0a41f6e7d90e02c28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7502699d37ed4a1517293b6ec3f4001504d057abac4dec0a41f6e7d90e02c28", kill_on_drop: false }`
[INFO] [stdout] a7502699d37ed4a1517293b6ec3f4001504d057abac4dec0a41f6e7d90e02c28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5bb869a7aefe9fed83fbd97a2211088f5ed584e3a67a9d18070117e24db7aea
[INFO] running `Command { std: "docker" "start" "-a" "a5bb869a7aefe9fed83fbd97a2211088f5ed584e3a67a9d18070117e24db7aea", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling syn v1.0.100
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]    Compiling thiserror v1.0.35
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bytemuck v1.12.1
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking textwrap v0.15.1
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking png v0.17.6
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking image v0.24.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.35
[INFO] [stderr]    Compiling clap_derive v3.2.18
[INFO] [stderr]     Checking clap v3.2.22
[INFO] [stderr]     Checking stega v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]  --> src/image/open.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use image::{self, ImageFormat, RgbImage};
[INFO] [stdout]   |             ^^^^ the item `image` 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 `image` is imported redundantly
[INFO] [stdout]  --> src/image/save.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use image::{self, ImageFormat, RgbImage};
[INFO] [stdout]   |             ^^^^ the item `image` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]   --> src/image/open.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     use image::{self, EncodableLayout, RgbImage};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     use super::*;
[INFO] [stdout]    |         -------- the item `image` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RgbImage` is imported redundantly
[INFO] [stdout]   --> src/image/open.rs:20:40
[INFO] [stdout]    |
[INFO] [stdout] 20 |     use image::{self, EncodableLayout, RgbImage};
[INFO] [stdout]    |                                        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     use super::*;
[INFO] [stdout]    |         -------- the item `RgbImage` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `image` is imported redundantly
[INFO] [stdout]   --> src/image/save.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use image::{self, RgbImage};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     use super::*;
[INFO] [stdout]    |         -------- the item `image` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `RgbImage` is imported redundantly
[INFO] [stdout]   --> src/image/save.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use image::{self, RgbImage};
[INFO] [stdout]    |                       ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     use super::*;
[INFO] [stdout]    |         -------- the item `RgbImage` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.25s
[INFO] running `Command { std: "docker" "inspect" "a5bb869a7aefe9fed83fbd97a2211088f5ed584e3a67a9d18070117e24db7aea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5bb869a7aefe9fed83fbd97a2211088f5ed584e3a67a9d18070117e24db7aea", kill_on_drop: false }`
[INFO] [stdout] a5bb869a7aefe9fed83fbd97a2211088f5ed584e3a67a9d18070117e24db7aea