[INFO] fetching crate jenner 0.2.0...
[INFO] testing jenner-0.2.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate jenner 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate jenner 0.2.0
[INFO] finished tweaking crates.io crate jenner 0.2.0
[INFO] tweaked toml for crates.io crate jenner 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jenner 0.2.0 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 52 packages to latest compatible versions
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] bb2e6b1947c2b8bb3dbfe14543d490b390be702f3f1c6891bc3b3d6d1c2da996
[INFO] running `Command { std: "docker" "start" "-a" "bb2e6b1947c2b8bb3dbfe14543d490b390be702f3f1c6891bc3b3d6d1c2da996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb2e6b1947c2b8bb3dbfe14543d490b390be702f3f1c6891bc3b3d6d1c2da996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb2e6b1947c2b8bb3dbfe14543d490b390be702f3f1c6891bc3b3d6d1c2da996", kill_on_drop: false }`
[INFO] [stdout] bb2e6b1947c2b8bb3dbfe14543d490b390be702f3f1c6891bc3b3d6d1c2da996
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 60425844a0097e3d72eaeb828b94de69cc667c415c6ad658db2308cb8dc10ca7
[INFO] running `Command { std: "docker" "start" "-a" "60425844a0097e3d72eaeb828b94de69cc667c415c6ad658db2308cb8dc10ca7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling jenner-macro v0.2.0
[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/jenner-macro-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/jenner-macro-0.2.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for mutable reference `&mut Vec<Attribute>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/jenner-macro-0.2.0/src/process.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 50 |           let yields = attrs
[INFO] [stdout]    |  ______________________-
[INFO] [stdout] 51 | |             .drain_filter(|attr| attr.path.get_ident().map_or(false, |i| i == "yields"))
[INFO] [stdout]    | |             -^^^^^^^^^^^^ method not found in `&mut Vec<Attribute>`
[INFO] [stdout]    | |_____________|
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jenner-macro` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "60425844a0097e3d72eaeb828b94de69cc667c415c6ad658db2308cb8dc10ca7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60425844a0097e3d72eaeb828b94de69cc667c415c6ad658db2308cb8dc10ca7", kill_on_drop: false }`
[INFO] [stdout] 60425844a0097e3d72eaeb828b94de69cc667c415c6ad658db2308cb8dc10ca7