[INFO] updating cached repository cfcosta/readability-cli
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cfcosta/readability-cli
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cfcosta/readability-cli" "work/ex/beta-1.38-1/sources/1.37.0/gh/cfcosta/readability-cli"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cfcosta/readability-cli'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cfcosta/readability-cli" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cfcosta/readability-cli"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cfcosta/readability-cli'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7d2fc39d8ec2bf3015189b1628de0085aa0275f
[INFO] sha for GitHub repo cfcosta/readability-cli: e7d2fc39d8ec2bf3015189b1628de0085aa0275f
[INFO] validating manifest of cfcosta/readability-cli on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cfcosta/readability-cli on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cfcosta/readability-cli
[INFO] finished frobbing cfcosta/readability-cli
[INFO] frobbed toml for cfcosta/readability-cli written to work/ex/beta-1.38-1/sources/1.37.0/gh/cfcosta/readability-cli/Cargo.toml
[INFO] started frobbing cfcosta/readability-cli
[INFO] finished frobbing cfcosta/readability-cli
[INFO] frobbed toml for cfcosta/readability-cli written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cfcosta/readability-cli/Cargo.toml
[INFO] crate cfcosta/readability-cli already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `https://github.com/cfcosta/readability`
[INFO] [stderr] error: failed to load source for a dependency on `readability`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/cfcosta/readability?branch=update-versions#a1987175
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec 'a19871755f4d324012648a2bcd760f131b2ba0cf' not found; class=Reference (4); code=NotFound (-3)
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed