[INFO] fetching crate meas 0.1.0...
[INFO] testing meas-0.1.0 against 1.90.0 for beta-1.91-2
[INFO] extracting crate meas 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate meas 0.1.0
[INFO] finished tweaking crates.io crate meas 0.1.0
[INFO] tweaked toml for crates.io crate meas 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate meas 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate meas 0.1.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `syn = "^1"` (locked to 1.0.94)
[INFO] [stderr] candidate versions found which didn't match: 0.9.2, 0.9.1, 0.9.0, ...
[INFO] [stderr] location searched: crates.io index
[INFO] [stderr] required by package `structopt-derive v0.4.18`
[INFO] [stderr]     ... which satisfies dependency `structopt-derive = "=0.4.18"` (locked to 0.4.18) of package `structopt v0.3.26`
[INFO] [stderr]     ... which satisfies dependency `structopt = "^0.3.26"` (locked to 0.3.26) of package `meas v0.1.0 (/workspace/builds/worker-6-tc1/source)`


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for the requirement `syn = "^1"` (locked to 1.0.94)
candidate versions found which didn't match: 0.9.2, 0.9.1, 0.9.0, ...
location searched: crates.io index
required by package `structopt-derive v0.4.18`
    ... which satisfies dependency `structopt-derive = "=0.4.18"` (locked to 0.4.18) of package `structopt v0.3.26`
    ... which satisfies dependency `structopt = "^0.3.26"` (locked to 0.3.26) of package `meas v0.1.0 (/workspace/builds/worker-6-tc1/source)`