[INFO] fetching crate hypers 0.7.8...
[INFO] checking hypers-0.7.8 against master#e1ac0fa95ba15221ee195647cb12464df3164513 for pr-126090
[INFO] extracting crate hypers 0.7.8 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate hypers 0.7.8 on toolchain e1ac0fa95ba15221ee195647cb12464df3164513
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e1ac0fa95ba15221ee195647cb12464df3164513" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hypers 0.7.8
[INFO] finished tweaking crates.io crate hypers 0.7.8
[INFO] tweaked toml for crates.io crate hypers 0.7.8 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e1ac0fa95ba15221ee195647cb12464df3164513" "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 `serde`.
[INFO] [stderr]     ... required by package `hypers_openapi v0.2.0`
[INFO] [stderr]     ... which satisfies dependency `hypers_openapi = "^0.2"` of package `hypers v0.7.8 (/workspace/builds/worker-3-tc1/source)`
[INFO] [stderr] versions that meet the requirements `=1.0.198` are: 1.0.198
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `serde v1.0.201`
[INFO] [stderr]     ... which satisfies dependency `serde = "=1.0.201"` of package `hypers v0.7.8 (/workspace/builds/worker-3-tc1/source)`
[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.