[INFO] cloning repository MegaBouncer/prometheus_scraper
[INFO] running `"git" "clone" "--bare" "git://github.com/MegaBouncer/prometheus_scraper.git" "work/cache/sources/gh/MegaBouncer/prometheus_scraper"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/MegaBouncer/prometheus_scraper'...
[INFO] running `"git" "clone" "work/cache/sources/gh/MegaBouncer/prometheus_scraper" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/MegaBouncer/prometheus_scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/MegaBouncer/prometheus_scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MegaBouncer/prometheus_scraper" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/MegaBouncer/prometheus_scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/MegaBouncer/prometheus_scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba6b6160f1392d3a18571dc367beb0fef754da7a
[INFO] sha for GitHub repo MegaBouncer/prometheus_scraper: ba6b6160f1392d3a18571dc367beb0fef754da7a
[INFO] validating manifest of MegaBouncer/prometheus_scraper on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of MegaBouncer/prometheus_scraper on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing MegaBouncer/prometheus_scraper
[INFO] removed path dependency shared from MegaBouncer/prometheus_scraper
[INFO] finished frobbing MegaBouncer/prometheus_scraper
[INFO] frobbed toml for MegaBouncer/prometheus_scraper written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/MegaBouncer/prometheus_scraper/Cargo.toml
[INFO] started frobbing MegaBouncer/prometheus_scraper
[INFO] removed path dependency shared from MegaBouncer/prometheus_scraper
[INFO] finished frobbing MegaBouncer/prometheus_scraper
[INFO] frobbed toml for MegaBouncer/prometheus_scraper written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/MegaBouncer/prometheus_scraper/Cargo.toml
[INFO] crate MegaBouncer/prometheus_scraper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/MegaBouncer/prometheus_scraper/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/rust-prometheus.git`
[INFO] [stderr] error: failed to select a version for `prometheus`.
[INFO] [stderr]     ... required by package `prometheus_scraper v0.1.0 (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/MegaBouncer/prometheus_scraper)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.7.0
[INFO] [stderr] 
[INFO] [stderr] the package `prometheus_scraper` depends on `prometheus`, with features: `hyper` but `prometheus` does not have these features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `prometheus` which could resolve this conflict
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed