[INFO] fetching crate mock_me 0.2.3...
[INFO] testing mock_me-0.2.3 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mock_me 0.2.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate mock_me 0.2.3
[INFO] finished tweaking crates.io crate mock_me 0.2.3
[INFO] tweaked toml for crates.io crate mock_me 0.2.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mock_me 0.2.3 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 2 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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: library `mock_me` should only specify `proc-macro = true` instead of setting `crate-type`
[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] 86c4b54fdc97b7e5e12b03a2bfb42353c6aa8faadb3ce73482018f58129acc1a
[INFO] running `Command { std: "docker" "start" "-a" "86c4b54fdc97b7e5e12b03a2bfb42353c6aa8faadb3ce73482018f58129acc1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "86c4b54fdc97b7e5e12b03a2bfb42353c6aa8faadb3ce73482018f58129acc1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86c4b54fdc97b7e5e12b03a2bfb42353c6aa8faadb3ce73482018f58129acc1a", kill_on_drop: false }`
[INFO] [stdout] 86c4b54fdc97b7e5e12b03a2bfb42353c6aa8faadb3ce73482018f58129acc1a
[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] 05e81f42d24104846ec4181eee3f03fcbc960f7c0dfb2eaa0a0c09d25f20047c
[INFO] running `Command { std: "docker" "start" "-a" "05e81f42d24104846ec4181eee3f03fcbc960f7c0dfb2eaa0a0c09d25f20047c", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: library `mock_me` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling mock_me_test_context v0.1.2
[INFO] [stderr]    Compiling mock_me v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![feature(proc_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `proc_macro` has been stable since `1.29.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![feature(proc_macro)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mock_me` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "05e81f42d24104846ec4181eee3f03fcbc960f7c0dfb2eaa0a0c09d25f20047c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05e81f42d24104846ec4181eee3f03fcbc960f7c0dfb2eaa0a0c09d25f20047c", kill_on_drop: false }`
[INFO] [stdout] 05e81f42d24104846ec4181eee3f03fcbc960f7c0dfb2eaa0a0c09d25f20047c