[INFO] cloning repository https://github.com/opentensor/polkadot-sdk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/opentensor/polkadot-sdk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopentensor%2Fpolkadot-sdk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopentensor%2Fpolkadot-sdk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5f9638e9c7e5206e48fce9f081832b3664068c9e
[INFO] checking opentensor/polkadot-sdk against master#8f359beca4e58bc3ae795a666301a8f47023044c for pr-121557
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopentensor%2Fpolkadot-sdk" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/opentensor/polkadot-sdk 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] removed /workspace/builds/worker-5-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/opentensor/polkadot-sdk
[INFO] finished tweaking git repo https://github.com/opentensor/polkadot-sdk
[INFO] tweaked toml for git repo https://github.com/opentensor/polkadot-sdk written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/opentensor/polkadot-sdk 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" "+8f359beca4e58bc3ae795a666301a8f47023044c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/w3f/ring-vrf`
[INFO] [stderr]     Updating git repository `https://github.com/kianenigma/simple-mermaid.git`
[INFO] [stderr]     Updating git repository `https://github.com/w3f/fflonk`
[INFO] [stderr]     Updating git repository `https://github.com/w3f/ring-proof`
[INFO] [stderr]     Updating git repository `https://github.com/paritytech/arkworks-substrate`
[INFO] [stderr]     Updating git repository `https://github.com/paritytech/polkadot-sdk`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `serde`.
[INFO] [stderr]     ... required by package `sp-storage v19.0.0 (https://github.com/paritytech/polkadot-sdk#1c435e91)`
[INFO] [stderr]     ... which satisfies git dependency `sp-storage` of package `sp-runtime-interface v24.0.0 (https://github.com/paritytech/polkadot-sdk#1c435e91)`
[INFO] [stderr]     ... which satisfies git dependency `sp-runtime-interface` of package `sp-crypto-ec-utils v0.10.0 (https://github.com/paritytech/polkadot-sdk#1c435e91)`
[INFO] [stderr]     ... which satisfies git dependency `sp-crypto-ec-utils` of package `sp-ark-bls12-381 v0.4.2 (https://github.com/paritytech/arkworks-substrate#caa2eed7)`
[INFO] [stderr]     ... which satisfies git dependency `sp-ark-bls12-381` (locked to 0.4.2) of package `bandersnatch_vrfs v0.0.3 (https://github.com/w3f/ring-vrf?rev=cbc342e#cbc342e9)`
[INFO] [stderr]     ... which satisfies git dependency `bandersnatch_vrfs` (locked to 0.0.3) of package `sp-core v21.0.0 (/workspace/builds/worker-5-tc1/source/substrate/primitives/core)`
[INFO] [stderr]     ... which satisfies path dependency `sp-core` (locked to 21.0.0) of package `frame-support-test-compile-pass v4.0.0-dev (/workspace/builds/worker-5-tc1/source/substrate/frame/support/test/compile_pass)`
[INFO] [stderr] versions that meet the requirements `^1.0.197` are: 1.0.197
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `serde v1.0.188`
[INFO] [stderr]     ... which satisfies dependency `serde = "^1.0.188"` (locked to 1.0.188) of package `node-bench v0.9.0-dev (/workspace/builds/worker-5-tc1/source/substrate/bin/node/bench)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `serde` 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.