[INFO] fetching crate futures-net 0.6.0...
[INFO] testing futures-net-0.6.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210
[INFO] extracting crate futures-net 0.6.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate futures-net 0.6.0
[INFO] finished tweaking crates.io crate futures-net 0.6.0
[INFO] tweaked toml for crates.io crate futures-net 0.6.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate futures-net 0.6.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "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" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 61 packages to latest compatible versions
[INFO] [stderr]       Adding bytes v0.4.12 (available: v1.11.1)
[INFO] [stderr]       Adding env_logger v0.6.2 (available: v0.11.10)
[INFO] [stderr]       Adding parking_lot v0.10.2 (available: v0.12.5)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rdrand v0.4.0
[INFO] [stderr]   Downloaded tempdir v0.3.7
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded remove_dir_all v0.5.3
[INFO] [stderr] error: failed to unpack package `remove_dir_all v0.5.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to create directory `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/remove_dir_all-0.5.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: command failed: exit status: 101
       
           Blocking waiting for file lock on package cache
           Blocking waiting for file lock on package cache
        Downloading crates ...
         Downloaded rdrand v0.4.0
         Downloaded tempdir v0.3.7
         Downloaded rand_core v0.3.1
         Downloaded remove_dir_all v0.5.3
       error: failed to unpack package `remove_dir_all v0.5.3`
       
       Caused by:
         failed to create directory `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/remove_dir_all-0.5.3`
       
       Caused by:
         No space left on device (os error 28)