[INFO] updating cached repository johanlindblad/icfp2k6-vm
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/johanlindblad/icfp2k6-vm
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/johanlindblad/icfp2k6-vm" "work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/johanlindblad/icfp2k6-vm"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/johanlindblad/icfp2k6-vm'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/johanlindblad/icfp2k6-vm" "work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/johanlindblad/icfp2k6-vm"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/johanlindblad/icfp2k6-vm'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8e72298a9f21db5f692bab6a96c52978d8928c7
[INFO] sha for GitHub repo johanlindblad/icfp2k6-vm: a8e72298a9f21db5f692bab6a96c52978d8928c7
[INFO] validating manifest of johanlindblad/icfp2k6-vm on toolchain master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of johanlindblad/icfp2k6-vm on toolchain try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing johanlindblad/icfp2k6-vm
[INFO] finished frobbing johanlindblad/icfp2k6-vm
[INFO] frobbed toml for johanlindblad/icfp2k6-vm written to work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/johanlindblad/icfp2k6-vm/Cargo.toml
[INFO] started frobbing johanlindblad/icfp2k6-vm
[INFO] finished frobbing johanlindblad/icfp2k6-vm
[INFO] frobbed toml for johanlindblad/icfp2k6-vm written to work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/johanlindblad/icfp2k6-vm/Cargo.toml
[INFO] crate johanlindblad/icfp2k6-vm already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Updating git repository `https://github.com/dzamlo/rust-bitfield`
[INFO] [stderr] error: failed to load source for a dependency on `bitfield`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/dzamlo/rust-bitfield#5d3fa3d7
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '5d3fa3d7b324421802e526f879df93b447e2bd98' 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" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed