[INFO] fetching crate zng-task 0.6.7...
[INFO] checking zng-task-0.6.7 against master#b56aaec52bc0fa35591a872fb4aac81f606e265c for pr-122661-1
[INFO] extracting crate zng-task 0.6.7 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate zng-task 0.6.7
[INFO] finished tweaking crates.io crate zng-task 0.6.7
[INFO] tweaked toml for crates.io crate zng-task 0.6.7 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate zng-task 0.6.7 on toolchain b56aaec52bc0fa35591a872fb4aac81f606e265c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zng-task 0.6.7 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" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "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] error: failed to select a version for the requirement `zng-env = "^0.5.3"` (locked to 0.5.3)
[INFO] [stderr] candidate versions found which didn't match: 0.3.8, 0.3.7, 0.3.6, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `zng-task v0.6.7 (/workspace/builds/worker-7-tc1/source)`


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
error: failed to select a version for the requirement `zng-env = "^0.5.3"` (locked to 0.5.3)
candidate versions found which didn't match: 0.3.8, 0.3.7, 0.3.6, ...
location searched: crates.io index
required by package `zng-task v0.6.7 (/workspace/builds/worker-7-tc1/source)`