[INFO] cloning repository https://github.com/loiclec/fuzzcheck_proc_macro2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/loiclec/fuzzcheck_proc_macro2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floiclec%2Ffuzzcheck_proc_macro2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floiclec%2Ffuzzcheck_proc_macro2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff8a67e014df367bac56b941812ebde8622217fd
[INFO] documenting loiclec/fuzzcheck_proc_macro2 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Floiclec%2Ffuzzcheck_proc_macro2" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/loiclec/fuzzcheck_proc_macro2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/loiclec/fuzzcheck_proc_macro2
[INFO] finished tweaking git repo https://github.com/loiclec/fuzzcheck_proc_macro2
[INFO] tweaked toml for git repo https://github.com/loiclec/fuzzcheck_proc_macro2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/loiclec/fuzzcheck_proc_macro2 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/loiclec/fuzzcheck-rs`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `libc`.
[INFO] [stderr]     ... required by package `fuzzcheck v0.12.1 (https://github.com/loiclec/fuzzcheck-rs#9077693a)`
[INFO] [stderr]     ... which satisfies git dependency `fuzzcheck` of package `fuzzcheck_proc_macro2 v0.1.0 (/workspace/builds/worker-3-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.2.126` are: 0.2.152, 0.2.151, 0.2.150, 0.2.149, 0.2.148, 0.2.147, 0.2.146, 0.2.144, 0.2.143, 0.2.142, 0.2.141, 0.2.140, 0.2.139, 0.2.138, 0.2.137, 0.2.136, 0.2.135, 0.2.134, 0.2.133, 0.2.132, 0.2.131, 0.2.129, 0.2.127, 0.2.126
[INFO] [stderr] 
[INFO] [stderr] all possible versions conflict with previously selected packages.
[INFO] [stderr] 
[INFO] [stderr]   previously selected package `libc v0.2.119`
[INFO] [stderr]     ... which satisfies dependency `libc = "^0.2.64"` (locked to 0.2.119) of package `getrandom v0.2.5`
[INFO] [stderr]     ... which satisfies dependency `getrandom = "^0.2.3"` (locked to 0.2.5) of package `ahash v0.7.6`
[INFO] [stderr]     ... which satisfies dependency `ahash = "^0.7.6"` (locked to 0.7.6) of package `fuzzcheck v0.12.1 (https://github.com/loiclec/fuzzcheck-rs#9077693a)`
[INFO] [stderr]     ... which satisfies git dependency `fuzzcheck` of package `fuzzcheck_proc_macro2 v0.1.0 (/workspace/builds/worker-3-tc1/source)`
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `libc` 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.