[INFO] fetching crate bookcase 0.2.0-alpha.0...
[INFO] checking bookcase-0.2.0-alpha.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate bookcase 0.2.0-alpha.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate bookcase 0.2.0-alpha.0
[INFO] finished tweaking crates.io crate bookcase 0.2.0-alpha.0
[INFO] tweaked toml for crates.io crate bookcase 0.2.0-alpha.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate bookcase 0.2.0-alpha.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] crate crates.io crate bookcase 0.2.0-alpha.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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d31a3ccdd4ef95f76440c731696008e3fe1b72bcf7c99559aad937a0d6368550
[INFO] running `Command { std: "docker" "start" "-a" "d31a3ccdd4ef95f76440c731696008e3fe1b72bcf7c99559aad937a0d6368550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d31a3ccdd4ef95f76440c731696008e3fe1b72bcf7c99559aad937a0d6368550", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d31a3ccdd4ef95f76440c731696008e3fe1b72bcf7c99559aad937a0d6368550", kill_on_drop: false }`
[INFO] [stdout] d31a3ccdd4ef95f76440c731696008e3fe1b72bcf7c99559aad937a0d6368550
[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 -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] cf372866ed306db48d99a574f9a3e4a6594ba8d88870a3f54cf91b5ecd0080cc
[INFO] running `Command { std: "docker" "start" "-a" "cf372866ed306db48d99a574f9a3e4a6594ba8d88870a3f54cf91b5ecd0080cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]     Checking zlib-rs v0.5.2
[INFO] [stderr]    Compiling built v0.7.7
[INFO] [stderr]     Checking nom v8.0.0
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]    Compiling zstd-safe v7.2.4
[INFO] [stderr]    Compiling cc v1.2.43
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking inout v0.1.4
[INFO] [stderr]     Checking rgb v0.8.52
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking zune-core v0.4.12
[INFO] [stderr]     Checking rayon v1.11.0
[INFO] [stderr]     Checking new_debug_unreachable v1.0.6
[INFO] [stderr]     Checking weezl v0.1.10
[INFO] [stderr]     Checking imgref v1.12.0
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking bitstream-io v2.6.0
[INFO] [stderr]    Compiling noop_proc_macro v0.3.0
[INFO] [stderr]     Checking crc v3.3.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking zune-jpeg v0.4.21
[INFO] [stderr]     Checking loop9 v0.1.5
[INFO] [stderr]     Checking cipher v0.4.4
[INFO] [stderr]     Checking zopfli v0.8.2
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking pxfm v0.1.25
[INFO] [stderr]    Compiling rav1e v0.7.1
[INFO] [stderr]     Checking avif-serialize v0.8.6
[INFO] [stderr]     Checking libbz2-rs-sys v0.2.2
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking time v0.3.44
[INFO] [stderr]     Checking gif v0.13.3
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling simd_helpers v0.1.0
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking image-webp v0.2.4
[INFO] [stderr]     Checking aes v0.8.4
[INFO] [stderr]     Checking pbkdf2 v0.12.2
[INFO] [stderr]     Checking lzma-rust2 v0.13.0
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]     Checking filetime v0.2.26
[INFO] [stderr]     Checking rustc-hash v2.1.1
[INFO] [stderr]     Checking ppmd-rust v1.2.1
[INFO] [stderr]     Checking deflate64 v0.1.10
[INFO] [stderr]     Checking sysinfo v0.37.2
[INFO] [stderr]     Checking bzip2 v0.6.1
[INFO] [stderr]     Checking libz-rs-sys v0.5.2
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking flate2 v1.1.5
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]    Compiling libdeflate-sys v1.24.0
[INFO] [stderr]     Checking maybe-rayon v0.1.1
[INFO] [stderr]     Checking png v0.18.0
[INFO] [stderr]     Checking moxcms v0.7.7
[INFO] [stderr]     Checking libdeflater v1.24.0
[INFO] [stderr]     Checking oxipng v9.1.5
[INFO] [stderr]    Compiling equator-macro v0.4.2
[INFO] [stderr]    Compiling zerocopy-derive v0.8.27
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling profiling-procmacros v1.0.17
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.4
[INFO] [stderr]    Compiling fax_derive v0.2.0
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]     Checking profiling v1.0.17
[INFO] [stderr]     Checking zeroize v1.8.2
[INFO] [stderr]     Checking fax v0.2.6
[INFO] [stderr]     Checking equator v0.4.2
[INFO] [stderr]     Checking thiserror v1.0.69
[INFO] [stderr]     Checking zstd v0.13.3
[INFO] [stderr]     Checking aligned-vec v0.6.4
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking v_frame v0.3.9
[INFO] [stderr]     Checking zip v6.0.0
[INFO] [stderr]     Checking av1-grain v0.2.5
[INFO] [stderr]     Checking thiserror v2.0.17
[INFO] [stderr]     Checking zerocopy v0.8.27
[INFO] [stderr]     Checking half v2.7.1
[INFO] [stderr]     Checking exr v1.73.0
[INFO] [stderr]     Checking tiff v0.10.3
[INFO] [stderr]     Checking ravif v0.11.20
[INFO] [stderr]     Checking image v0.25.8
[INFO] [stderr]     Checking bookcase v0.2.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/io/byte_len.rs:29:54
[INFO] [stdout]    |
[INFO] [stdout] 29 |       fn byte_len(&self) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 30 | |         Ok(self.as_ref().len())
[INFO] [stdout] 31 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/io/byte_len.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Ok(self.as_ref().len())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/io/byte_len.rs:29:54
[INFO] [stdout]    |
[INFO] [stdout] 29 |       fn byte_len(&self) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 30 | |         Ok(self.as_ref().len())
[INFO] [stdout] 31 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/io/byte_len.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |         Ok(self.as_ref().len())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bookcase` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `bookcase` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cf372866ed306db48d99a574f9a3e4a6594ba8d88870a3f54cf91b5ecd0080cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf372866ed306db48d99a574f9a3e4a6594ba8d88870a3f54cf91b5ecd0080cc", kill_on_drop: false }`
[INFO] [stdout] cf372866ed306db48d99a574f9a3e4a6594ba8d88870a3f54cf91b5ecd0080cc