[INFO] fetching crate jupyter-kernel 0.1.0...
[INFO] testing jupyter-kernel-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate jupyter-kernel 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate jupyter-kernel 0.1.0
[INFO] finished tweaking crates.io crate jupyter-kernel 0.1.0
[INFO] tweaked toml for crates.io crate jupyter-kernel 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jupyter-kernel 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] 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 106 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.3.5 (available: v0.11.8)
[INFO] [stderr]       Adding log v0.3.9 (available: v0.4.28)
[INFO] [stderr]       Adding nom v0.4.0 (available: v8.0.0)
[INFO] [stderr]       Adding serde v0.6.15 (available: v1.0.228)
[INFO] [stderr]       Adding serde_json v0.6.1 (available: v1.0.145)
[INFO] [stderr]       Adding serde_macros v0.5.3 (available: v0.8.9)
[INFO] [stderr]       Adding zmq v0.7.0 (available: v0.10.0)
[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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 46239e11f70da5f94a505cbf6534e891b9d7cf8dcee4649fa62f7e92cc9b2186
[INFO] running `Command { std: "docker" "start" "-a" "46239e11f70da5f94a505cbf6534e891b9d7cf8dcee4649fa62f7e92cc9b2186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46239e11f70da5f94a505cbf6534e891b9d7cf8dcee4649fa62f7e92cc9b2186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46239e11f70da5f94a505cbf6534e891b9d7cf8dcee4649fa62f7e92cc9b2186", kill_on_drop: false }`
[INFO] [stdout] 46239e11f70da5f94a505cbf6534e891b9d7cf8dcee4649fa62f7e92cc9b2186
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e9771a8aabd66acf70fb1f888a7c8818f02f24179a0f35368d0614020474bec3
[INFO] running `Command { std: "docker" "start" "-a" "e9771a8aabd66acf70fb1f888a7c8818f02f24179a0f35368d0614020474bec3", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]    Compiling hashbrown v0.16.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling winnow v0.7.13
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling num-bigint v0.1.45
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling indexmap v2.11.4
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling rustc-serialize v0.3.25
[INFO] [stderr]    Compiling cfg-expr v0.15.8
[INFO] [stderr]    Compiling crossbeam v0.8.4
[INFO] [stderr]    Compiling num-rational v0.1.43
[INFO] [stderr]    Compiling cc v1.2.39
[INFO] [stderr]    Compiling num-complex v0.1.44
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling version-compare v0.2.0
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling aster v0.22.1
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/aster-0.22.1/src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | extern crate syntax;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/aster-0.22.1/src/lib.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "with-syntex"), feature(rustc_private))]
[INFO] [stdout]   |                                           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stdout] Some errors have detailed explanations: E0463, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aster` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e9771a8aabd66acf70fb1f888a7c8818f02f24179a0f35368d0614020474bec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9771a8aabd66acf70fb1f888a7c8818f02f24179a0f35368d0614020474bec3", kill_on_drop: false }`
[INFO] [stdout] e9771a8aabd66acf70fb1f888a7c8818f02f24179a0f35368d0614020474bec3