[INFO] fetching crate spawns-core 1.1.2...
[INFO] testing spawns-core-1.1.2 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate spawns-core 1.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate spawns-core 1.1.2
[INFO] finished tweaking crates.io crate spawns-core 1.1.2
[INFO] tweaked toml for crates.io crate spawns-core 1.1.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate spawns-core 1.1.2 on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate spawns-core 1.1.2 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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "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/li/nk/linkme, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `futures-util = "^0.3.31"` (locked to 0.3.31)
[INFO] [stderr] candidate versions found which didn't match: 0.2.1, 0.2.0, 0.2.0-beta, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `futures v0.3.31`
[INFO] [stderr]     ... which satisfies dependency `futures = "^0.3.30"` (locked to 0.3.31) of package `spawns-core v1.1.2 (/workspace/builds/worker-2-tc1/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     futures-util = { version = "0.2.0-beta" }


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
warning: failed to write cache, path: /workspace/cargo-home/registry/index/index.crates.io-1949cf8c6b5b557f/.cache/li/nk/linkme, error: No space left on device (os error 28)
error: failed to select a version for the requirement `futures-util = "^0.3.31"` (locked to 0.3.31)
candidate versions found which didn't match: 0.2.1, 0.2.0, 0.2.0-beta, ...
location searched: crates.io index
required by package `futures v0.3.31`
    ... which satisfies dependency `futures = "^0.3.30"` (locked to 0.3.31) of package `spawns-core v1.1.2 (/workspace/builds/worker-2-tc1/source)`
if you are looking for the prerelease package it needs to be specified explicitly
    futures-util = { version = "0.2.0-beta" }