[INFO] cloning repository https://github.com/RezRh/FlatDrop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RezRh/FlatDrop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRezRh%2FFlatDrop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRezRh%2FFlatDrop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d89d275be6cb5f805475e02985895be4f1c2e25
[INFO] checking RezRh/FlatDrop against master#f8463896a9b36a04899c013bd8825a7fd29dd7a4 for pr-151920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRezRh%2FFlatDrop" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/RezRh/FlatDrop
[INFO] finished tweaking git repo https://github.com/RezRh/FlatDrop
[INFO] tweaked toml for git repo https://github.com/RezRh/FlatDrop written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/RezRh/FlatDrop on toolchain f8463896a9b36a04899c013bd8825a7fd29dd7a4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/RezRh/FlatDrop 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" "+f8463896a9b36a04899c013bd8825a7fd29dd7a4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `hkdf`.
[INFO] [stderr]     ... required by package `hub v0.1.0 (/workspace/builds/worker-2-tc1/source/native/hub)`
[INFO] [stderr] versions that meet the requirements `^0.12` (locked to 0.12.4) are: 0.12.4
[INFO] [stderr] 
[INFO] [stderr] package `hub` depends on `hkdf` with feature `zeroize` but `hkdf` does not have that feature.
[INFO] [stderr]  available features: std
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `hkdf` which could resolve this conflict


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for `hkdf`.
    ... required by package `hub v0.1.0 (/workspace/builds/worker-2-tc1/source/native/hub)`
versions that meet the requirements `^0.12` (locked to 0.12.4) are: 0.12.4

package `hub` depends on `hkdf` with feature `zeroize` but `hkdf` does not have that feature.
 available features: std


failed to select a version for `hkdf` which could resolve this conflict