[INFO] fetching crate iterum_macros 0.1.0...
[INFO] testing iterum_macros-0.1.0 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate iterum_macros 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iterum_macros 0.1.0
[INFO] finished tweaking crates.io crate iterum_macros 0.1.0
[INFO] tweaked toml for crates.io crate iterum_macros 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterum_macros 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] crate crates.io crate iterum_macros 0.1.0 already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/se/mv/semver, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
[INFO] [stderr] candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     darling = { version = "0.13.0-beta" }
[INFO] testing iterum_macros-0.1.0 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate iterum_macros 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iterum_macros 0.1.0
[INFO] finished tweaking crates.io crate iterum_macros 0.1.0
[INFO] tweaked toml for crates.io crate iterum_macros 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterum_macros 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] crate crates.io crate iterum_macros 0.1.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr] warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/se/rd/serde, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
[INFO] [stderr] candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     darling = { version = "0.13.0-beta" }
[INFO] testing iterum_macros-0.1.0 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate iterum_macros 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iterum_macros 0.1.0
[INFO] finished tweaking crates.io crate iterum_macros 0.1.0
[INFO] tweaked toml for crates.io crate iterum_macros 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterum_macros 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] crate crates.io crate iterum_macros 0.1.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
[INFO] [stderr] candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     darling = { version = "0.13.0-beta" }
[INFO] testing iterum_macros-0.1.0 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate iterum_macros 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iterum_macros 0.1.0
[INFO] finished tweaking crates.io crate iterum_macros 0.1.0
[INFO] tweaked toml for crates.io crate iterum_macros 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterum_macros 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] crate crates.io crate iterum_macros 0.1.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
[INFO] [stderr] candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     darling = { version = "0.13.0-beta" }
[INFO] testing iterum_macros-0.1.0 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate iterum_macros 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate iterum_macros 0.1.0
[INFO] finished tweaking crates.io crate iterum_macros 0.1.0
[INFO] tweaked toml for crates.io crate iterum_macros 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterum_macros 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] crate crates.io crate iterum_macros 0.1.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
[INFO] [stderr] candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     darling = { version = "0.13.0-beta" }


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for the requirement `darling = "^0.20"` (locked to 0.20.11)
candidate versions found which didn't match: 0.13.0-beta, 0.12.4, 0.12.3, ...
location searched: crates.io index
required by package `iterum_macros v0.1.0 (/workspace/builds/worker-3-tc2/source)`
if you are looking for the prerelease package it needs to be specified explicitly
    darling = { version = "0.13.0-beta" }