[INFO] fetching crate uavcan-core 0.0.1...
[INFO] checking uavcan-core-0.0.1 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate uavcan-core 0.0.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate uavcan-core 0.0.1 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate uavcan-core 0.0.1
[INFO] finished tweaking crates.io crate uavcan-core 0.0.1
[INFO] tweaked toml for crates.io crate uavcan-core 0.0.1 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "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 `syn = "^0.10.5"`
[INFO] [stderr] candidate versions found which didn't match: 2.0.60, 2.0.59, 2.0.58, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `uavcan-derive v0.0.1`
[INFO] [stderr]     ... which satisfies dependency `uavcan-derive = "^0.0.1"` of package `uavcan-core v0.0.1 (/workspace/builds/worker-0-tc1/source)`
[INFO] [stderr] perhaps a crate was updated and forgotten to be re-vendored?
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:yanked
[ERROR] caused by: the crate depends on yanked dependencies
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
