[INFO] fetching crate rx_core_subscriber_higher_order 0.2.1...
[INFO] testing rx_core_subscriber_higher_order-0.2.1 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210
[INFO] extracting crate rx_core_subscriber_higher_order 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate rx_core_subscriber_higher_order 0.2.1
[INFO] finished tweaking crates.io crate rx_core_subscriber_higher_order 0.2.1
[INFO] tweaked toml for crates.io crate rx_core_subscriber_higher_order 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rx_core_subscriber_higher_order 0.2.1 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] crate crates.io crate rx_core_subscriber_higher_order 0.2.1 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" "+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 proc-macro2 v1.0.106
[INFO] [stderr] error: 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 proc-macro2 v1.0.106
       error: No space left on device (os error 28)