[INFO] fetching crate slog-config 0.4.0...
[INFO] checking slog-config-0.4.0 against master#f8f6997469237299c1d60814c7b9828602a1f8e4 for pr-143808
[INFO] extracting crate slog-config 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate slog-config 0.4.0
[INFO] finished tweaking crates.io crate slog-config 0.4.0
[INFO] tweaked toml for crates.io crate slog-config 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate slog-config 0.4.0 on toolchain f8f6997469237299c1d60814c7b9828602a1f8e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f8f6997469237299c1d60814c7b9828602a1f8e4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for `toml`.
[INFO] [stderr]     ... required by package `slog-config v0.4.0 (/workspace/builds/worker-6-tc1/source)`
[INFO] [stderr] versions that meet the requirements `^0.4` are: 0.4.10, 0.4.9, 0.4.8, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0
[INFO] [stderr] 
[INFO] [stderr] package `slog-config` depends on `toml` with feature `serde` but `toml` does not have that feature.
[INFO] [stderr]  A required dependency with that name exists, but only optional dependencies can be used as features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `toml` which could resolve this conflict


command failed: exit status: 101

    Updating crates.io index
error: failed to select a version for `toml`.
    ... required by package `slog-config v0.4.0 (/workspace/builds/worker-6-tc1/source)`
versions that meet the requirements `^0.4` are: 0.4.10, 0.4.9, 0.4.8, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0

package `slog-config` depends on `toml` with feature `serde` but `toml` does not have that feature.
 A required dependency with that name exists, but only optional dependencies can be used as features.


failed to select a version for `toml` which could resolve this conflict