[INFO] cloning repository https://github.com/kpids/iife
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kpids/iife" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpids%2Fiife", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpids%2Fiife'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 878dc10a56ff723b6db284f4221d5715789ca7d9
[INFO] testing kpids/iife against 1.95.0 for beta-1.96-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpids%2Fiife" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kpids/iife
[INFO] finished tweaking git repo https://github.com/kpids/iife
[INFO] tweaked toml for git repo https://github.com/kpids/iife written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kpids/iife on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kpids/iife 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] 
[INFO] [stderr] thread 'main' (621189) panicked at src/tools/cargo/src/cargo/sources/registry/index/cache.rs:195:39:
[INFO] [stderr] called `Option::unwrap()` on a `None` value
[INFO] [stderr] note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


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
       
       thread 'main' (621189) panicked at src/tools/cargo/src/cargo/sources/registry/index/cache.rs:195:39:
       called `Option::unwrap()` on a `None` value
       note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace