[INFO] updating cached repository MegaBouncer/prometheus_scraper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MegaBouncer/prometheus_scraper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MegaBouncer/prometheus_scraper" "work/ex/pr-59928/sources/master#df25d79a33b0c82b716699a75a41bfdc6089850a/gh/MegaBouncer/prometheus_scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-59928/sources/master#df25d79a33b0c82b716699a75a41bfdc6089850a/gh/MegaBouncer/prometheus_scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MegaBouncer/prometheus_scraper" "work/ex/pr-59928/sources/try#424a4ae163d6517f301cd4048a4b5dd785be5b2f/gh/MegaBouncer/prometheus_scraper"`
[INFO] [stderr] Cloning into 'work/ex/pr-59928/sources/try#424a4ae163d6517f301cd4048a4b5dd785be5b2f/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#df25d79a33b0c82b716699a75a41bfdc6089850a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+df25d79a33b0c82b716699a75a41bfdc6089850a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of MegaBouncer/prometheus_scraper on toolchain try#424a4ae163d6517f301cd4048a4b5dd785be5b2f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+424a4ae163d6517f301cd4048a4b5dd785be5b2f-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-59928/sources/master#df25d79a33b0c82b716699a75a41bfdc6089850a/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-59928/sources/try#424a4ae163d6517f301cd4048a4b5dd785be5b2f/gh/MegaBouncer/prometheus_scraper/Cargo.toml
[INFO] crate MegaBouncer/prometheus_scraper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+df25d79a33b0c82b716699a75a41bfdc6089850a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-59928/sources/master#df25d79a33b0c82b716699a75a41bfdc6089850a/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/crater/work/local/cargo-home/bin/cargo" "+df25d79a33b0c82b716699a75a41bfdc6089850a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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/crater/work/ex/pr-59928/sources/master#df25d79a33b0c82b716699a75a41bfdc6089850a/gh/MegaBouncer/prometheus_scraper)`
[INFO] [stderr] versions that meet the requirements `*` are: 0.5.0
[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/crater/work/local/cargo-home/bin/cargo" "+df25d79a33b0c82b716699a75a41bfdc6089850a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed