[INFO] updating cached repository rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-mikrokontroller-praktikum/stm32f7-discovery" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/rust-mikrokontroller-praktikum/stm32f7-discovery"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/rust-mikrokontroller-praktikum/stm32f7-discovery'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rust-mikrokontroller-praktikum/stm32f7-discovery" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/rust-mikrokontroller-praktikum/stm32f7-discovery"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/rust-mikrokontroller-praktikum/stm32f7-discovery'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 18c3ba0fe9390ba297a2dcf6f168585e3ea8b800
[INFO] sha for GitHub repo rust-mikrokontroller-praktikum/stm32f7-discovery: 18c3ba0fe9390ba297a2dcf6f168585e3ea8b800
[INFO] validating manifest of rust-mikrokontroller-praktikum/stm32f7-discovery on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-mikrokontroller-praktikum/stm32f7-discovery on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] disabled cargo feature 'default-run' from rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] removed path dependency core from rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] finished frobbing rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] frobbed toml for rust-mikrokontroller-praktikum/stm32f7-discovery written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/rust-mikrokontroller-praktikum/stm32f7-discovery/Cargo.toml
[INFO] started frobbing rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] disabled cargo feature 'default-run' from rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] removed path dependency core from rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] finished frobbing rust-mikrokontroller-praktikum/stm32f7-discovery
[INFO] frobbed toml for rust-mikrokontroller-praktikum/stm32f7-discovery written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/rust-mikrokontroller-praktikum/stm32f7-discovery/Cargo.toml
[INFO] crate rust-mikrokontroller-praktikum/stm32f7-discovery already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-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]     Updating git repository `https://github.com/astro/smoltcp.git`
[INFO] [stderr] error: failed to load source for a dependency on `smoltcp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Unable to update https://github.com/astro/smoltcp.git?branch=dhcp#8333045c
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   revspec '8333045cbce83c122b091b62da7dc3d002a4c9b2' not found; class=Reference (4); code=NotFound (-3)
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed