[INFO] cloning repository https://github.com/kristof-mattei/version-testing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kristof-mattei/version-testing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristof-mattei%2Fversion-testing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristof-mattei%2Fversion-testing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a1456fa08b24447c4a3b04e87c2a1cdf560132c
[INFO] checking kristof-mattei/version-testing against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristof-mattei%2Fversion-testing" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/kristof-mattei/version-testing
[INFO] finished tweaking git repo https://github.com/kristof-mattei/version-testing
[INFO] tweaked toml for git repo https://github.com/kristof-mattei/version-testing written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kristof-mattei/version-testing 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/kristof-mattei/version-testing 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]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `mimalloc`.
[INFO] [stderr]     ... required by package `rust-testbench v0.0.0-development (/workspace/builds/worker-7-tc1/source/crates/rust-testbench)`
[INFO] [stderr] versions that meet the requirements `^0.1.50` are: 0.1.50
[INFO] [stderr] 
[INFO] [stderr] package `rust-testbench` depends on `mimalloc` with feature `v3` but `mimalloc` does not have that feature.
[INFO] [stderr]  package `mimalloc` does have feature `v2`
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `mimalloc` which could resolve this conflict


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: command failed: exit status: 101
       
           Updating crates.io index
       error: failed to select a version for `mimalloc`.
           ... required by package `rust-testbench v0.0.0-development (/workspace/builds/worker-7-tc1/source/crates/rust-testbench)`
       versions that meet the requirements `^0.1.50` are: 0.1.50
       
       package `rust-testbench` depends on `mimalloc` with feature `v3` but `mimalloc` does not have that feature.
        package `mimalloc` does have feature `v2`
       
       
       failed to select a version for `mimalloc` which could resolve this conflict