[INFO] cloning repository gwicke/html5ever-playground
[INFO] running `"git" "clone" "--bare" "git://github.com/gwicke/html5ever-playground.git" "work/cache/sources/gh/gwicke/html5ever-playground"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/gwicke/html5ever-playground'...
[INFO] running `"git" "clone" "work/cache/sources/gh/gwicke/html5ever-playground" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/gwicke/html5ever-playground"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/gwicke/html5ever-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gwicke/html5ever-playground" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/gwicke/html5ever-playground"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/gwicke/html5ever-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b334ddc4b4fb54a77a37b8b8a454e57bab20f21
[INFO] sha for GitHub repo gwicke/html5ever-playground: 3b334ddc4b4fb54a77a37b8b8a454e57bab20f21
[INFO] validating manifest of gwicke/html5ever-playground on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gwicke/html5ever-playground on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gwicke/html5ever-playground
[INFO] removed path dependency html5ever_dom_sink from gwicke/html5ever-playground
[INFO] finished frobbing gwicke/html5ever-playground
[INFO] frobbed toml for gwicke/html5ever-playground written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/gwicke/html5ever-playground/Cargo.toml
[INFO] started frobbing gwicke/html5ever-playground
[INFO] removed path dependency html5ever_dom_sink from gwicke/html5ever-playground
[INFO] finished frobbing gwicke/html5ever-playground
[INFO] frobbed toml for gwicke/html5ever-playground written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/gwicke/html5ever-playground/Cargo.toml
[INFO] crate gwicke/html5ever-playground already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/gwicke/html5ever-playground/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/servo/html5ever`
[INFO] [stderr]     Updating git repository `https://github.com/servo/string-cache`
[INFO] [stderr] error: no matching package named `string_cache_plugin` found
[INFO] [stderr] location searched: https://github.com/servo/string-cache
[INFO] [stderr] required by package `html5ever-test v0.1.0 (/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/gwicke/html5ever-playground)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed