[INFO] fetching crate tacky-borders-logger 0.1.0...
[INFO] testing tacky-borders-logger-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate tacky-borders-logger 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate tacky-borders-logger 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate tacky-borders-logger 0.1.0
[INFO] tweaked toml for crates.io crate tacky-borders-logger 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tacky-borders-logger 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 tacky-borders-logger 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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6560e7288df5cf858aa54db2a537e57e015638812c9b8430da8d8138741ba10b
[INFO] running `Command { std: "docker" "start" "-a" "6560e7288df5cf858aa54db2a537e57e015638812c9b8430da8d8138741ba10b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6560e7288df5cf858aa54db2a537e57e015638812c9b8430da8d8138741ba10b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6560e7288df5cf858aa54db2a537e57e015638812c9b8430da8d8138741ba10b", kill_on_drop: false }`
[INFO] [stdout] 6560e7288df5cf858aa54db2a537e57e015638812c9b8430da8d8138741ba10b
[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=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] dccd1de0eb1505cf0e694baa35ebff4722017d28e8f12e9e5b3a6c40bd43c0de
[INFO] running `Command { std: "docker" "start" "-a" "dccd1de0eb1505cf0e694baa35ebff4722017d28e8f12e9e5b3a6c40bd43c0de", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling tacky-borders-logger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "dccd1de0eb1505cf0e694baa35ebff4722017d28e8f12e9e5b3a6c40bd43c0de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dccd1de0eb1505cf0e694baa35ebff4722017d28e8f12e9e5b3a6c40bd43c0de", kill_on_drop: false }`
[INFO] [stdout] dccd1de0eb1505cf0e694baa35ebff4722017d28e8f12e9e5b3a6c40bd43c0de
[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=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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e510d06a6b0f97eb043345068857c96f00c5a1487c1c839626e5058f94ec174
[INFO] running `Command { std: "docker" "start" "-a" "6e510d06a6b0f97eb043345068857c96f00c5a1487c1c839626e5058f94ec174", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.15
[INFO] [stderr]    Compiling anyhow v1.0.95
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling termcolor2 v0.1.1
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling chrono v0.4.39
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling tacky-borders-logger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling sp_log2 v0.1.3
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/vec_log.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_push_within_capacity)]
[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 `tacky-borders-logger` (example "vec_log") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6e510d06a6b0f97eb043345068857c96f00c5a1487c1c839626e5058f94ec174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e510d06a6b0f97eb043345068857c96f00c5a1487c1c839626e5058f94ec174", kill_on_drop: false }`
[INFO] [stdout] 6e510d06a6b0f97eb043345068857c96f00c5a1487c1c839626e5058f94ec174