[INFO] fetching crate zflow 0.1.12...
[INFO] testing zflow-0.1.12 against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] extracting crate zflow 0.1.12 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate zflow 0.1.12
[INFO] finished tweaking crates.io crate zflow 0.1.12
[INFO] tweaked toml for crates.io crate zflow 0.1.12 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate zflow 0.1.12 on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zflow 0.1.12 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" "+1ef7943ee607160a564655b6596f83670ef95df5" "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/as/se/assert-json-diff, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for the requirement `serde_derive = "=1.0.147"` (locked to 1.0.147)
[INFO] [stderr] candidate versions found which didn't match: 0.8.15, 0.8.14, 0.8.13, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `serde v1.0.147`
[INFO] [stderr]     ... which satisfies dependency `serde = "^1.0"` (locked to 1.0.147) of package `zflow v0.1.12 (/workspace/builds/worker-4-tc1/source)`
[INFO] [stderr] if you are looking for the prerelease package it needs to be specified explicitly
[INFO] [stderr]     serde_derive = { version = "0.8.10-rc1" }


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/as/se/assert-json-diff, error: No space left on device (os error 28)
error: failed to select a version for the requirement `serde_derive = "=1.0.147"` (locked to 1.0.147)
candidate versions found which didn't match: 0.8.15, 0.8.14, 0.8.13, ...
location searched: crates.io index
required by package `serde v1.0.147`
    ... which satisfies dependency `serde = "^1.0"` (locked to 1.0.147) of package `zflow v0.1.12 (/workspace/builds/worker-4-tc1/source)`
if you are looking for the prerelease package it needs to be specified explicitly
    serde_derive = { version = "0.8.10-rc1" }