[INFO] fetching crate rustwire 0.2.0...
[INFO] testing rustwire-0.2.0 against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] extracting crate rustwire 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate rustwire 0.2.0
[INFO] finished tweaking crates.io crate rustwire 0.2.0
[INFO] tweaked toml for crates.io crate rustwire 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustwire 0.2.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "generate-lockfile" "--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/pr/os/prost, error: No space left on device (os error 28)
[INFO] [stderr] error: failed to select a version for `prost`.
[INFO] [stderr]     ... required by package `rustwire v0.2.0 (/workspace/builds/worker-5-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.12` are: 0.12.6, 0.12.4
[INFO] [stderr] 
[INFO] [stderr] package `rustwire` depends on `prost` with feature `derive` but `prost` does not have that feature.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `prost` which could resolve this conflict


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/pr/os/prost, error: No space left on device (os error 28)
error: failed to select a version for `prost`.
    ... required by package `rustwire v0.2.0 (/workspace/builds/worker-5-tc1/source)`
versions that meet the requirements `^0.12` are: 0.12.6, 0.12.4

package `rustwire` depends on `prost` with feature `derive` but `prost` does not have that feature.


failed to select a version for `prost` which could resolve this conflict