[INFO] cloning repository https://github.com/deepsafe/def-rvrf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/deepsafe/def-rvrf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeepsafe%2Fdef-rvrf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeepsafe%2Fdef-rvrf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3613e2e7e5d2da94ac7666241c67001340b5944e
[INFO] checking deepsafe/def-rvrf against master#b52edc25bfbaa955b4b83c10f998e5224c3478b2 for pr-156776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeepsafe%2Fdef-rvrf" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/deepsafe/def-rvrf
[INFO] finished tweaking git repo https://github.com/deepsafe/def-rvrf
[INFO] tweaked toml for git repo https://github.com/deepsafe/def-rvrf written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/deepsafe/def-rvrf on toolchain b52edc25bfbaa955b4b83c10f998e5224c3478b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b52edc25bfbaa955b4b83c10f998e5224c3478b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/deepsafe/def-rvrf 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" "+b52edc25bfbaa955b4b83c10f998e5224c3478b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/deepsafe/curve25519-dalek.git`
[INFO] [stderr]     Updating git repository `https://github.com/deepsafe/polynomials.git`
[INFO] [stderr]     Updating git repository `https://github.com/mesalock-linux/rand-sgx`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `zeroize`.
[INFO] [stderr]     ... required by package `curve25519-dalek v2.1.3 (https://github.com/deepsafe/curve25519-dalek.git?branch=deepsafe#3aeb7439)`
[INFO] [stderr]     ... which satisfies git dependency `curve25519-dalek` of package `ringvrf v0.1.0 (/workspace/builds/worker-4-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^1.6.0` are: 1.8.2, 1.8.1, 1.7.0, 1.6.0
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `zeroize v1.3.0`
[INFO] [stderr]     ... which satisfies dependency `zeroize = "^1"` (locked to 1.3.0) of package `elliptic-curve v0.9.12`
[INFO] [stderr]     ... which satisfies dependency `elliptic-curve = "^0.9.11"` (locked to 0.9.12) of package `k256 v0.8.1`
[INFO] [stderr]     ... which satisfies dependency `k256 = "^0.8"` (locked to 0.8.1) of package `ringvrf v0.1.0 (/workspace/builds/worker-4-tc1/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `zeroize` which could resolve this conflict


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: command failed: exit status: 101
       
           Blocking waiting for file lock on package cache
           Updating git repository `https://github.com/deepsafe/curve25519-dalek.git`
           Updating git repository `https://github.com/deepsafe/polynomials.git`
           Updating git repository `https://github.com/mesalock-linux/rand-sgx`
           Updating crates.io index
       error: failed to select a version for `zeroize`.
           ... required by package `curve25519-dalek v2.1.3 (https://github.com/deepsafe/curve25519-dalek.git?branch=deepsafe#3aeb7439)`
           ... which satisfies git dependency `curve25519-dalek` of package `ringvrf v0.1.0 (/workspace/builds/worker-4-tc1/source)`
       versions that meet the requirements `^1.6.0` are: 1.8.2, 1.8.1, 1.7.0, 1.6.0
       
       all possible versions conflict with previously selected packages
       
         previously selected package `zeroize v1.3.0`
           ... which satisfies dependency `zeroize = "^1"` (locked to 1.3.0) of package `elliptic-curve v0.9.12`
           ... which satisfies dependency `elliptic-curve = "^0.9.11"` (locked to 0.9.12) of package `k256 v0.8.1`
           ... which satisfies dependency `k256 = "^0.8"` (locked to 0.8.1) of package `ringvrf v0.1.0 (/workspace/builds/worker-4-tc1/source)`
       
       failed to select a version for `zeroize` which could resolve this conflict