[INFO] fetching crate proptest-state-machine 0.3.1...
[INFO] testing proptest-state-machine-0.3.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate proptest-state-machine 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] testing proptest-state-machine-0.3.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate proptest-state-machine 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] testing proptest-state-machine-0.3.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate proptest-state-machine 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] testing proptest-state-machine-0.3.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate proptest-state-machine 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate proptest-state-machine 0.3.1 on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proptest-state-machine 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate proptest-state-machine 0.3.1
[INFO] tweaked toml for crates.io crate proptest-state-machine 0.3.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate proptest-state-machine 0.3.1 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "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] error: failed to download `message-io v0.18.0`
[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 `message-io v0.18.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack entry at `message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack `message-io-0.18.0/Cargo.lock` into `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unexpected end of file
[INFO] testing proptest-state-machine-0.3.1 against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] extracting crate proptest-state-machine 0.3.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate proptest-state-machine 0.3.1 on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proptest-state-machine 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate proptest-state-machine 0.3.1
[INFO] tweaked toml for crates.io crate proptest-state-machine 0.3.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate proptest-state-machine 0.3.1 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: failed to download `message-io v0.18.0`
[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 `message-io v0.18.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack entry at `message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack `message-io-0.18.0/Cargo.lock` into `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unexpected end of file


command failed: exit status: 101

    Blocking waiting for file lock on package cache
error: failed to download `message-io v0.18.0`

Caused by:
  unable to get packages from source

Caused by:
  failed to unpack package `message-io v0.18.0`

Caused by:
  failed to unpack entry at `message-io-0.18.0/Cargo.lock`

Caused by:
  failed to unpack `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`

Caused by:
  failed to unpack `message-io-0.18.0/Cargo.lock` into `/workspace/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/message-io-0.18.0/Cargo.lock`

Caused by:
  unexpected end of file