[INFO] updating cached repository tectonic-typesetting/tectonic
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tectonic-typesetting/tectonic
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tectonic-typesetting/tectonic" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tectonic-typesetting/tectonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tectonic-typesetting/tectonic'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tectonic-typesetting/tectonic" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tectonic-typesetting/tectonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tectonic-typesetting/tectonic'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b8dc04a3ddd82a51975b91c7a718853db30c928
[INFO] sha for GitHub repo tectonic-typesetting/tectonic: 7b8dc04a3ddd82a51975b91c7a718853db30c928
[INFO] validating manifest of tectonic-typesetting/tectonic on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tectonic-typesetting/tectonic on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tectonic-typesetting/tectonic
[INFO] removed workspace from tectonic-typesetting/tectonic
[INFO] removed path dependency tectonic_xdv from tectonic-typesetting/tectonic
[INFO] finished frobbing tectonic-typesetting/tectonic
[INFO] frobbed toml for tectonic-typesetting/tectonic written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tectonic-typesetting/tectonic/Cargo.toml
[INFO] started frobbing tectonic-typesetting/tectonic
[INFO] removed workspace from tectonic-typesetting/tectonic
[INFO] removed path dependency tectonic_xdv from tectonic-typesetting/tectonic
[INFO] finished frobbing tectonic-typesetting/tectonic
[INFO] frobbed toml for tectonic-typesetting/tectonic written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/tectonic-typesetting/tectonic/Cargo.toml
[INFO] crate tectonic-typesetting/tectonic already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: failed to select a version for the requirement `tectonic_xdv = "^0.1.9-dev"`
[INFO] [stderr]   candidate versions found which didn't match: 0.1.8
[INFO] [stderr]   location searched: crates.io index
[INFO] [stderr] required by package `tectonic v0.1.12-dev (/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/tectonic-typesetting/tectonic)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed