[INFO] fetching crate ucan 0.4.0...
[INFO] testing ucan-0.4.0 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate ucan 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate ucan 0.4.0
[INFO] finished tweaking crates.io crate ucan 0.4.0
[INFO] tweaked toml for crates.io crate ucan 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ucan 0.4.0 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "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" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `core2 = "^0.4"`
[INFO] [stderr]   version 0.4.0 is yanked
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `libipld-core v0.16.0`
[INFO] [stderr]     ... which satisfies dependency `libipld-core = "^0.16"` of package `ucan v0.4.0 (/workspace/builds/worker-6-tc1/source)`


overridden task result to broken:yanked

Caused by:
    the crate depends on yanked dependencies: 
    
        Updating crates.io index
    error: failed to select a version for the requirement `core2 = "^0.4"`
      version 0.4.0 is yanked
    location searched: crates.io index
    required by package `libipld-core v0.16.0`
        ... which satisfies dependency `libipld-core = "^0.16"` of package `ucan v0.4.0 (/workspace/builds/worker-6-tc1/source)`