[INFO] updating cached repository ELD/rocket-graphql
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ELD/rocket-graphql
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ELD/rocket-graphql" "work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/ELD/rocket-graphql"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/ELD/rocket-graphql'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ELD/rocket-graphql" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/ELD/rocket-graphql"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/ELD/rocket-graphql'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7517190bcd9bffb8a1680018de15bb345aaa7143
[INFO] sha for GitHub repo ELD/rocket-graphql: 7517190bcd9bffb8a1680018de15bb345aaa7143
[INFO] validating manifest of ELD/rocket-graphql on toolchain master#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ELD/rocket-graphql on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ELD/rocket-graphql
[INFO] finished frobbing ELD/rocket-graphql
[INFO] frobbed toml for ELD/rocket-graphql written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/ELD/rocket-graphql/Cargo.toml
[INFO] started frobbing ELD/rocket-graphql
[INFO] finished frobbing ELD/rocket-graphql
[INFO] frobbed toml for ELD/rocket-graphql written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/ELD/rocket-graphql/Cargo.toml
[INFO] crate ELD/rocket-graphql already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/ELD/juniper`
[INFO] [stderr] error: failed to load source for a dependency on `juniper`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/ELD/juniper?branch=update-rocket-to-0.4-rc#661d53e7
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '661d53e73621cc90ffc176d6b35cd12ce989ed07' 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" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed