[INFO] fetching crate pareto 2.5.16...
[INFO] testing pareto-2.5.16 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate pareto 2.5.16 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate pareto 2.5.16
[INFO] finished tweaking crates.io crate pareto 2.5.16
[INFO] tweaked toml for crates.io crate pareto 2.5.16 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pareto 2.5.16 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 pareto 2.5.16 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr] error: failed to download `windows_x86_64_gnu v0.52.6`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack package `windows_x86_64_gnu v0.52.6`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to create directory `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/windows_x86_64_gnu-0.52.6`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
    Blocking waiting for file lock on package cache
 Downloading crates ...
error: failed to download `windows_x86_64_gnu v0.52.6`

Caused by:
  unable to get packages from source

Caused by:
  failed to unpack package `windows_x86_64_gnu v0.52.6`

Caused by:
  failed to create directory `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/windows_x86_64_gnu-0.52.6`

Caused by:
  No space left on device (os error 28)