[INFO] updating cached repository rust-lang-nursery/chalk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-lang-nursery/chalk
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-lang-nursery/chalk" "work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rust-lang-nursery/chalk"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rust-lang-nursery/chalk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-lang-nursery/chalk" "work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rust-lang-nursery/chalk"`
[INFO] [stderr] Cloning into 'work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rust-lang-nursery/chalk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 201775c47e4cefeb71d7f415c605e09c02e33b22
[INFO] sha for GitHub repo rust-lang-nursery/chalk: 201775c47e4cefeb71d7f415c605e09c02e33b22
[INFO] validating manifest of rust-lang-nursery/chalk 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 rust-lang-nursery/chalk 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 rust-lang-nursery/chalk
[INFO] removed workspace from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-engine from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-ir from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-macros from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-parse from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-rust-ir from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-solve from rust-lang-nursery/chalk
[INFO] finished frobbing rust-lang-nursery/chalk
[INFO] frobbed toml for rust-lang-nursery/chalk written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rust-lang-nursery/chalk/Cargo.toml
[INFO] started frobbing rust-lang-nursery/chalk
[INFO] removed workspace from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-engine from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-ir from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-macros from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-parse from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-rust-ir from rust-lang-nursery/chalk
[INFO] removed path dependency chalk-solve from rust-lang-nursery/chalk
[INFO] finished frobbing rust-lang-nursery/chalk
[INFO] frobbed toml for rust-lang-nursery/chalk written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/gh/rust-lang-nursery/chalk/Cargo.toml
[INFO] crate rust-lang-nursery/chalk 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]     Updating crates.io index
[INFO] [stderr] error: no matching package named `chalk-ir` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `chalk v0.1.0 (/mnt/big/crater/work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/gh/rust-lang-nursery/chalk)`
[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