[INFO] updating cached repository george-aprozeanu/alibi
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/george-aprozeanu/alibi
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/george-aprozeanu/alibi" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/george-aprozeanu/alibi"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/george-aprozeanu/alibi'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/george-aprozeanu/alibi" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/george-aprozeanu/alibi"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/george-aprozeanu/alibi'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a0b2b1411a62200abb4595479e6f64251ced1cf3
[INFO] sha for GitHub repo george-aprozeanu/alibi: a0b2b1411a62200abb4595479e6f64251ced1cf3
[INFO] validating manifest of george-aprozeanu/alibi on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of george-aprozeanu/alibi on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing george-aprozeanu/alibi
[INFO] removed path dependency semver from george-aprozeanu/alibi
[INFO] finished frobbing george-aprozeanu/alibi
[INFO] frobbed toml for george-aprozeanu/alibi written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/george-aprozeanu/alibi/Cargo.toml
[INFO] started frobbing george-aprozeanu/alibi
[INFO] removed path dependency semver from george-aprozeanu/alibi
[INFO] finished frobbing george-aprozeanu/alibi
[INFO] frobbed toml for george-aprozeanu/alibi written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/george-aprozeanu/alibi/Cargo.toml
[INFO] crate george-aprozeanu/alibi already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `semver = "^0.10.0"`
[INFO] [stderr]   candidate versions found which didn't match: 0.9.0, 0.8.0, 0.7.0, ...
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `alibi v0.1.0 (/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/george-aprozeanu/alibi)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed