[INFO] fetching crate ruszt-macros 0.0.2...
[INFO] testing ruszt-macros-0.0.2 against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] extracting crate ruszt-macros 0.0.2 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate ruszt-macros 0.0.2
[INFO] finished tweaking crates.io crate ruszt-macros 0.0.2
[INFO] tweaked toml for crates.io crate ruszt-macros 0.0.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ruszt-macros 0.0.2 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 crates.io crate ruszt-macros 0.0.2 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 2.0.100)
[INFO] [stderr] candidate versions found which didn't match: 1.0.34, 1.0.33, 1.0.32, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `ruszt-macros v0.0.2 (/workspace/builds/worker-4-tc1/source)`


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 2.0.100)
candidate versions found which didn't match: 1.0.34, 1.0.33, 1.0.32, ...
location searched: crates.io index
required by package `ruszt-macros v0.0.2 (/workspace/builds/worker-4-tc1/source)`