[INFO] fetching crate fc-rpc 1.0.0...
[INFO] checking fc-rpc-1.0.0 against master#8f359beca4e58bc3ae795a666301a8f47023044c for pr-121557
[INFO] extracting crate fc-rpc 1.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate fc-rpc 1.0.0 on toolchain 8f359beca4e58bc3ae795a666301a8f47023044c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fc-rpc 1.0.0
[INFO] finished tweaking crates.io crate fc-rpc 1.0.0
[INFO] tweaked toml for crates.io crate fc-rpc 1.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "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 `snow`.
[INFO] [stderr]     ... required by package `libp2p-noise v0.29.0`
[INFO] [stderr]     ... which satisfies dependency `libp2p-noise = "^0.29.0"` of package `libp2p v0.34.0`
[INFO] [stderr]     ... which satisfies dependency `libp2p = "^0.34.0"` of package `sc-network v0.9.0`
[INFO] [stderr]     ... which satisfies dependency `sc-network = "^0.9.0"` of package `fc-rpc v1.0.0 (/workspace/builds/worker-2-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.7.1` are: 0.7.2, 0.7.1
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `snow v0.7.1`
[INFO] [stderr]     ... which satisfies dependency `snow = "^0.7.1"` of package `libp2p-noise v0.29.0`
[INFO] [stderr]     ... which satisfies dependency `libp2p-noise = "^0.29.0"` of package `libp2p v0.34.0`
[INFO] [stderr]     ... which satisfies dependency `libp2p = "^0.34.0"` of package `sc-network v0.9.0`
[INFO] [stderr]     ... which satisfies dependency `sc-network = "^0.9.0"` of package `fc-rpc v1.0.0 (/workspace/builds/worker-2-tc1/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `snow` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.