[INFO] fetching crate pi_ext_heap 0.1.1...
[INFO] testing pi_ext_heap-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate pi_ext_heap 0.1.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate pi_ext_heap 0.1.1
[INFO] finished tweaking crates.io crate pi_ext_heap 0.1.1
[INFO] tweaked toml for crates.io crate pi_ext_heap 0.1.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pi_ext_heap 0.1.1 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] 9643dfa3dee0b58222b5870f6756ab808e4a6f04ce0d8b01796dfe6866628337
[INFO] running `Command { std: "docker" "start" "-a" "9643dfa3dee0b58222b5870f6756ab808e4a6f04ce0d8b01796dfe6866628337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9643dfa3dee0b58222b5870f6756ab808e4a6f04ce0d8b01796dfe6866628337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9643dfa3dee0b58222b5870f6756ab808e4a6f04ce0d8b01796dfe6866628337", kill_on_drop: false }`
[INFO] [stdout] 9643dfa3dee0b58222b5870f6756ab808e4a6f04ce0d8b01796dfe6866628337
[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] f11def5b054904be339ed9cf8522297ee320d296cad8b3eaf7531cae0d32f9a2
[INFO] running `Command { std: "docker" "start" "-a" "f11def5b054904be339ed9cf8522297ee320d296cad8b3eaf7531cae0d32f9a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling pi_ext_heap v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(min_specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:145:1
[INFO] [stdout]     |
[INFO] [stdout] 145 | #![feature(inplace_iteration)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:146:1
[INFO] [stdout]     |
[INFO] [stdout] 146 | #![feature(trusted_len)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | #![feature(exact_size_is_empty)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:148:1
[INFO] [stdout]     |
[INFO] [stdout] 148 | #![feature(extend_one)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pi_ext_heap` (lib) due to 5 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f11def5b054904be339ed9cf8522297ee320d296cad8b3eaf7531cae0d32f9a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f11def5b054904be339ed9cf8522297ee320d296cad8b3eaf7531cae0d32f9a2", kill_on_drop: false }`
[INFO] [stdout] f11def5b054904be339ed9cf8522297ee320d296cad8b3eaf7531cae0d32f9a2