[INFO] updating cached repository rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-mikrokontroller-praktikum/stm32f7-netscan" "work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/rust-mikrokontroller-praktikum/stm32f7-netscan"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/rust-mikrokontroller-praktikum/stm32f7-netscan'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-mikrokontroller-praktikum/stm32f7-netscan" "work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/rust-mikrokontroller-praktikum/stm32f7-netscan"`
[INFO] [stderr] Cloning into 'work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/rust-mikrokontroller-praktikum/stm32f7-netscan'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c51ac8be6a905ae6177fcd2d6aecd963a08316c7
[INFO] sha for GitHub repo rust-mikrokontroller-praktikum/stm32f7-netscan: c51ac8be6a905ae6177fcd2d6aecd963a08316c7
[INFO] validating manifest of rust-mikrokontroller-praktikum/stm32f7-netscan on toolchain master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-mikrokontroller-praktikum/stm32f7-netscan on toolchain try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+af22dfc7f56a5057c6b6120a65c74e7b6c1530af-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] removed path dependency core from rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] finished frobbing rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] frobbed toml for rust-mikrokontroller-praktikum/stm32f7-netscan written to work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/rust-mikrokontroller-praktikum/stm32f7-netscan/Cargo.toml
[INFO] started frobbing rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] removed path dependency core from rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] finished frobbing rust-mikrokontroller-praktikum/stm32f7-netscan
[INFO] frobbed toml for rust-mikrokontroller-praktikum/stm32f7-netscan written to work/ex/pr-61753/sources/try#af22dfc7f56a5057c6b6120a65c74e7b6c1530af/gh/rust-mikrokontroller-praktikum/stm32f7-netscan/Cargo.toml
[INFO] crate rust-mikrokontroller-praktikum/stm32f7-netscan already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: no matching package named `core` found
[INFO] [stderr] location searched: registry `https://github.com/rust-lang/crates.io-index`
[INFO] [stderr] required by package `stm32f7-netscan v0.1.0 (/mnt/big/crater/work/ex/pr-61753/sources/master#8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be/gh/rust-mikrokontroller-praktikum/stm32f7-netscan)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8e948df707ea8a3c88c65bf2ffdcb2f1cf5491be-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed