[INFO] cloning repository https://github.com/superdevs-org/week-1-assignment-2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/superdevs-org/week-1-assignment-2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuperdevs-org%2Fweek-1-assignment-2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuperdevs-org%2Fweek-1-assignment-2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d83cf4e47638a2a471bea25e369b4eaf349604f6
[INFO] testing superdevs-org/week-1-assignment-2 against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuperdevs-org%2Fweek-1-assignment-2" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/superdevs-org/week-1-assignment-2
[INFO] finished tweaking git repo https://github.com/superdevs-org/week-1-assignment-2
[INFO] tweaked toml for git repo https://github.com/superdevs-org/week-1-assignment-2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/superdevs-org/week-1-assignment-2 on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/superdevs-org/week-1-assignment-2 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" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `syn = "^2.0"` (locked to 2.0.104)
[INFO] [stderr] candidate versions found which didn't match: 2.0.9, 2.0.8, 2.0.7, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `serialize_macro v0.1.0 (/workspace/builds/worker-6-tc1/source/serialize_macro)`


command failed: exit status: 101

    Blocking waiting for file lock on package cache
    Updating crates.io index
error: failed to select a version for the requirement `syn = "^2.0"` (locked to 2.0.104)
candidate versions found which didn't match: 2.0.9, 2.0.8, 2.0.7, ...
location searched: crates.io index
required by package `serialize_macro v0.1.0 (/workspace/builds/worker-6-tc1/source/serialize_macro)`