[INFO] updating cached repository killercup/rust-proc-macro-test-linking-error
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/killercup/rust-proc-macro-test-linking-error
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/rust-proc-macro-test-linking-error" "work/ex/beta-1.38-1/sources/1.37.0/gh/killercup/rust-proc-macro-test-linking-error"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/killercup/rust-proc-macro-test-linking-error'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/killercup/rust-proc-macro-test-linking-error" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/killercup/rust-proc-macro-test-linking-error"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/killercup/rust-proc-macro-test-linking-error'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c3fc7c16a245e6162fc0eb75ca170150242d6518
[INFO] sha for GitHub repo killercup/rust-proc-macro-test-linking-error: c3fc7c16a245e6162fc0eb75ca170150242d6518
[INFO] validating manifest of killercup/rust-proc-macro-test-linking-error 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"`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: invalid syntax in killercup/rust-proc-macro-test-linking-error's Cargo.toml
[ERROR] caused by: command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` failed
[ERROR]