[INFO] updating cached repository chklauser/beachhead-companion
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/chklauser/beachhead-companion
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/chklauser/beachhead-companion" "work/ex/pr-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/chklauser/beachhead-companion"`
[INFO] [stderr] Cloning into 'work/ex/pr-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/chklauser/beachhead-companion'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/chklauser/beachhead-companion" "work/ex/pr-60620-1/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/chklauser/beachhead-companion"`
[INFO] [stderr] Cloning into 'work/ex/pr-60620-1/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/chklauser/beachhead-companion'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ece14ef968c10d64d89a40da94ece7aed972c9bb
[INFO] sha for GitHub repo chklauser/beachhead-companion: ece14ef968c10d64d89a40da94ece7aed972c9bb
[INFO] validating manifest of chklauser/beachhead-companion on toolchain master#ef01f29964df207f181bd5bcf236e41372a17273
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+ef01f29964df207f181bd5bcf236e41372a17273-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of chklauser/beachhead-companion on toolchain try#a7cff45e655f886da150e206c7acbe984df4ab71
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a7cff45e655f886da150e206c7acbe984df4ab71-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing chklauser/beachhead-companion
[INFO] finished frobbing chklauser/beachhead-companion
[INFO] frobbed toml for chklauser/beachhead-companion written to work/ex/pr-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/chklauser/beachhead-companion/Cargo.toml
[INFO] started frobbing chklauser/beachhead-companion
[INFO] finished frobbing chklauser/beachhead-companion
[INFO] frobbed toml for chklauser/beachhead-companion written to work/ex/pr-60620-1/sources/try#a7cff45e655f886da150e206c7acbe984df4ab71/gh/chklauser/beachhead-companion/Cargo.toml
[INFO] crate chklauser/beachhead-companion already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+ef01f29964df207f181bd5bcf236e41372a17273-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: failed to select a version for `url`.
[INFO] [stderr]     ... required by package `beachhead-companion v0.1.0 (/mnt/big/crater/work/ex/pr-60620-1/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/gh/chklauser/beachhead-companion)`
[INFO] [stderr] versions that meet the requirements `= 0.5.9` are: 0.5.9
[INFO] [stderr] 
[INFO] [stderr] the package `beachhead-companion` depends on `url`, with features: `rustc-serialize` but `url` does not have these features.
[INFO] [stderr]  It has a required dependency with that name, but only optional dependencies can be used as features.
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] failed to select a version for `url` 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" "+ef01f29964df207f181bd5bcf236e41372a17273-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed