[INFO] fetching crate synac 0.6.2...
[INFO] checking synac-0.6.2 against master#75530e9f72a1990ed2305e16fd51d02f47048f12 for pr-135899
[INFO] extracting crate synac 0.6.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate synac 0.6.2 on toolchain 75530e9f72a1990ed2305e16fd51d02f47048f12
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synac 0.6.2
[INFO] finished tweaking crates.io crate synac 0.6.2
[INFO] tweaked toml for crates.io crate synac 0.6.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "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] error: failed to select a version for the requirement `rmp-serde = "^0.13.7"`
[INFO] [stderr]   version 0.13.7 is yanked
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `synac v0.6.2 (/workspace/builds/worker-0-tc1/source)`


overridden task result to broken:yanked

Caused by:
    the crate depends on yanked dependencies: 
    
        Blocking waiting for file lock on package cache
        Updating crates.io index
    error: failed to select a version for the requirement `rmp-serde = "^0.13.7"`
      version 0.13.7 is yanked
    location searched: crates.io index
    required by package `synac v0.6.2 (/workspace/builds/worker-0-tc1/source)`