[INFO] updating cached repository lukaslihotzki/uc_pixelflood
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lukaslihotzki/uc_pixelflood
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lukaslihotzki/uc_pixelflood" "work/ex/beta-1.37-6/sources/1.36.0/gh/lukaslihotzki/uc_pixelflood"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/lukaslihotzki/uc_pixelflood'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lukaslihotzki/uc_pixelflood" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lukaslihotzki/uc_pixelflood"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lukaslihotzki/uc_pixelflood'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85e54ab3f2d84e07934b67f7e2a330880b7c5c43
[INFO] sha for GitHub repo lukaslihotzki/uc_pixelflood: 85e54ab3f2d84e07934b67f7e2a330880b7c5c43
[INFO] validating manifest of lukaslihotzki/uc_pixelflood on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lukaslihotzki/uc_pixelflood on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lukaslihotzki/uc_pixelflood
[INFO] finished frobbing lukaslihotzki/uc_pixelflood
[INFO] frobbed toml for lukaslihotzki/uc_pixelflood written to work/ex/beta-1.37-6/sources/1.36.0/gh/lukaslihotzki/uc_pixelflood/Cargo.toml
[INFO] started frobbing lukaslihotzki/uc_pixelflood
[INFO] finished frobbing lukaslihotzki/uc_pixelflood
[INFO] frobbed toml for lukaslihotzki/uc_pixelflood written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/lukaslihotzki/uc_pixelflood/Cargo.toml
[INFO] crate lukaslihotzki/uc_pixelflood already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: failed to resolve patches for `https://github.com/embed-rs/stm32f7-discovery.git`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to load source for a dependency on `stm32f7-discovery`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/lukaslihotzki/uc_pixelflood/stm32f7-discovery
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse manifest at `/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/lukaslihotzki/uc_pixelflood/stm32f7-discovery/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   the cargo feature `default-run` requires a nightly version of Cargo, but this is the `stable` channel
[INFO] [stderr] See https://doc.rust-lang.org/book/appendix-07-nightly-rust.html for more information about Rust release channels.
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed