[INFO] fetching crate pxsort 0.5.0...
[INFO] checking pxsort-0.5.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate pxsort 0.5.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate pxsort 0.5.0
[INFO] finished tweaking crates.io crate pxsort 0.5.0
[INFO] tweaked toml for crates.io crate pxsort 0.5.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pxsort 0.5.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 69 packages to latest compatible versions
[INFO] [stderr]       Adding image v0.21.3 (available: v0.25.8)
[INFO] [stderr]       Adding indicatif v0.11.0 (available: v0.18.3)
[INFO] [stderr]       Adding structopt v0.2.18 (available: v0.3.26)
[INFO] [stderr]       Adding strum v0.15.0 (available: v0.27.2)
[INFO] [stderr]       Adding strum_macros v0.15.0 (available: v0.27.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03783a2cb9fd1f7337ba859458ebe993357b7928c96fb76fc63617bb52b9902a
[INFO] running `Command { std: "docker" "start" "-a" "03783a2cb9fd1f7337ba859458ebe993357b7928c96fb76fc63617bb52b9902a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03783a2cb9fd1f7337ba859458ebe993357b7928c96fb76fc63617bb52b9902a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03783a2cb9fd1f7337ba859458ebe993357b7928c96fb76fc63617bb52b9902a", kill_on_drop: false }`
[INFO] [stdout] 03783a2cb9fd1f7337ba859458ebe993357b7928c96fb76fc63617bb52b9902a
[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=forbid -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b46a3c50b05253b306498dfa38e7cb9bc4dc7fbe2462631826d0811881754ba
[INFO] running `Command { std: "docker" "start" "-a" "7b46a3c50b05253b306498dfa38e7cb9bc4dc7fbe2462631826d0811881754ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking console v0.16.1
[INFO] [stderr]     Checking strum v0.15.0
[INFO] [stderr]     Checking rayon v1.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.21.3
[INFO] [stderr]     Checking pxsort v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/heuristic.rs:85:31
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn func(&self) -> Box<Fn(&Rgba<u8>) -> u8> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn func(&self) -> Box<dyn Fn(&Rgba<u8>) -> u8> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/heuristic.rs:85:31
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn func(&self) -> Box<Fn(&Rgba<u8>) -> u8> {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn func(&self) -> Box<dyn Fn(&Rgba<u8>) -> u8> {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/main.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[derive(StructOpt)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]   = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pxsort` (bin "pxsort" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]  --> src/main.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[derive(StructOpt)]
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]   = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pxsort` (bin "pxsort") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7b46a3c50b05253b306498dfa38e7cb9bc4dc7fbe2462631826d0811881754ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b46a3c50b05253b306498dfa38e7cb9bc4dc7fbe2462631826d0811881754ba", kill_on_drop: false }`
[INFO] [stdout] 7b46a3c50b05253b306498dfa38e7cb9bc4dc7fbe2462631826d0811881754ba
