[INFO] fetching crate r3_core 0.1.4...
[INFO] testing r3_core-0.1.4 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate r3_core 0.1.4 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate r3_core 0.1.4
[INFO] finished tweaking crates.io crate r3_core 0.1.4
[INFO] tweaked toml for crates.io crate r3_core 0.1.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate r3_core 0.1.4 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 102 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.9.4)
[INFO] [stderr]       Adding env_logger v0.8.4 (available: v0.11.8)
[INFO] [stderr]       Adding memoffset v0.6.5 (available: v0.9.1)
[INFO] [stderr]       Adding svgbob v0.6.6 (available: v0.6.7)
[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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6a906aa838a449672f9af1c5cb0cedacde448d17737df6b6a01885ec28a15fa2
[INFO] running `Command { std: "docker" "start" "-a" "6a906aa838a449672f9af1c5cb0cedacde448d17737df6b6a01885ec28a15fa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a906aa838a449672f9af1c5cb0cedacde448d17737df6b6a01885ec28a15fa2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a906aa838a449672f9af1c5cb0cedacde448d17737df6b6a01885ec28a15fa2", kill_on_drop: false }`
[INFO] [stdout] 6a906aa838a449672f9af1c5cb0cedacde448d17737df6b6a01885ec28a15fa2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] bd3aec891b5585ad100b1e54adaa9b388d41dea75e9917370e79b60ebb03c751
[INFO] running `Command { std: "docker" "start" "-a" "bd3aec891b5585ad100b1e54adaa9b388d41dea75e9917370e79b60ebb03c751", kill_on_drop: false }`
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling elain v0.3.1
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling tokenlock v0.3.8
[INFO] [stderr]    Compiling macropol v0.1.3
[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/memoffset-0.6.5/src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     feature(const_ptr_offset_from, const_refs_to_cell)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_refs_to_cell` has been stable since `1.83.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling svgbobdoc v0.3.0
[INFO] [stderr] error: could not compile `memoffset` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "bd3aec891b5585ad100b1e54adaa9b388d41dea75e9917370e79b60ebb03c751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd3aec891b5585ad100b1e54adaa9b388d41dea75e9917370e79b60ebb03c751", kill_on_drop: false }`
[INFO] [stdout] bd3aec891b5585ad100b1e54adaa9b388d41dea75e9917370e79b60ebb03c751