[INFO] fetching crate sticker-printer 0.1.0...
[INFO] testing sticker-printer-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate sticker-printer 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate sticker-printer 0.1.0
[INFO] finished tweaking crates.io crate sticker-printer 0.1.0
[INFO] tweaked toml for crates.io crate sticker-printer 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sticker-printer 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sticker-printer 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" "+beta-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54e30416e3a608fdb1fc7439a41adec4f77ab0cc2dba3421acb2a7f712cd8f94
[INFO] running `Command { std: "docker" "start" "-a" "54e30416e3a608fdb1fc7439a41adec4f77ab0cc2dba3421acb2a7f712cd8f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54e30416e3a608fdb1fc7439a41adec4f77ab0cc2dba3421acb2a7f712cd8f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54e30416e3a608fdb1fc7439a41adec4f77ab0cc2dba3421acb2a7f712cd8f94", kill_on_drop: false }`
[INFO] [stdout] 54e30416e3a608fdb1fc7439a41adec4f77ab0cc2dba3421acb2a7f712cd8f94
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a51f6571c393ddf93551296d8ccb8272974a2984d6924bb8eba28da6580dc8f
[INFO] running `Command { std: "docker" "start" "-a" "7a51f6571c393ddf93551296d8ccb8272974a2984d6924bb8eba28da6580dc8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling bytemuck v1.17.0
[INFO] [stderr]    Compiling adler2 v2.0.0
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling arrayref v0.3.8
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling crc32fast v1.4.2
[INFO] [stderr]    Compiling slotmap v1.0.7
[INFO] [stderr]    Compiling roxmltree v0.20.0
[INFO] [stderr]    Compiling tinyvec v1.8.0
[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.3.0
[INFO] [stderr]    Compiling miniz_oxide v0.8.0
[INFO] [stderr]    Compiling unicode-script v0.5.6
[INFO] [stderr]    Compiling siphasher v1.0.1
[INFO] [stderr]    Compiling strict-num v0.1.1
[INFO] [stderr]    Compiling fdeflate v0.3.4
[INFO] [stderr]    Compiling miniz_oxide v0.7.4
[INFO] [stderr]    Compiling kurbo v0.11.0
[INFO] [stderr]    Compiling zune-core v0.4.12
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling byteorder-lite v0.1.0
[INFO] [stderr]    Compiling unicode-properties v0.1.2
[INFO] [stderr]    Compiling tiny-skia-path v0.11.4
[INFO] [stderr]    Compiling unicode-ccc v0.3.0
[INFO] [stderr]    Compiling simplecss v0.2.1
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling weezl v0.1.8
[INFO] [stderr]    Compiling zune-jpeg v0.4.13
[INFO] [stderr]    Compiling unicode-vo v0.1.0
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]    Compiling fontconfig-parser v0.5.7
[INFO] [stderr]    Compiling imagesize v0.13.0
[INFO] [stderr]    Compiling core_maths v0.1.0
[INFO] [stderr]    Compiling pico-args v0.5.0
[INFO] [stderr]    Compiling ttf-parser v0.24.1
[INFO] [stderr]    Compiling data-url v0.3.1
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling image-webp v0.1.3
[INFO] [stderr]    Compiling gif v0.13.1
[INFO] [stderr]    Compiling memmap2 v0.9.4
[INFO] [stderr]    Compiling rgb v0.8.48
[INFO] [stderr]    Compiling flate2 v1.0.32
[INFO] [stderr]    Compiling svgtypes v0.15.2
[INFO] [stderr]    Compiling png v0.17.13
[INFO] [stderr]    Compiling rustybuzz v0.18.0
[INFO] [stderr]    Compiling fontdb v0.21.0
[INFO] [stderr]    Compiling tiny-skia v0.11.4
[INFO] [stderr]    Compiling image v0.25.2
[INFO] [stderr]    Compiling usvg v0.43.0
[INFO] [stderr]    Compiling resvg v0.43.0
[INFO] [stderr]    Compiling sticker-printer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(iter_next_chunk)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sticker-printer` (bin "sticker-printer") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "7a51f6571c393ddf93551296d8ccb8272974a2984d6924bb8eba28da6580dc8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a51f6571c393ddf93551296d8ccb8272974a2984d6924bb8eba28da6580dc8f", kill_on_drop: false }`
[INFO] [stdout] 7a51f6571c393ddf93551296d8ccb8272974a2984d6924bb8eba28da6580dc8f