[INFO] cloning repository pbrinkmeier/stm32f7-blink
[INFO] running `"git" "clone" "--bare" "git://github.com/pbrinkmeier/stm32f7-blink.git" "work/cache/sources/gh/pbrinkmeier/stm32f7-blink"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/pbrinkmeier/stm32f7-blink'...
[INFO] running `"git" "clone" "work/cache/sources/gh/pbrinkmeier/stm32f7-blink" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/pbrinkmeier/stm32f7-blink"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/pbrinkmeier/stm32f7-blink'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pbrinkmeier/stm32f7-blink" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/pbrinkmeier/stm32f7-blink"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/pbrinkmeier/stm32f7-blink'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 710b17101f1f119b1ac712acc6c266534d3e3520
[INFO] sha for GitHub repo pbrinkmeier/stm32f7-blink: 710b17101f1f119b1ac712acc6c266534d3e3520
[INFO] validating manifest of pbrinkmeier/stm32f7-blink 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 pbrinkmeier/stm32f7-blink 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 pbrinkmeier/stm32f7-blink
[INFO] finished frobbing pbrinkmeier/stm32f7-blink
[INFO] frobbed toml for pbrinkmeier/stm32f7-blink written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/pbrinkmeier/stm32f7-blink/Cargo.toml
[INFO] started frobbing pbrinkmeier/stm32f7-blink
[INFO] finished frobbing pbrinkmeier/stm32f7-blink
[INFO] frobbed toml for pbrinkmeier/stm32f7-blink written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/pbrinkmeier/stm32f7-blink/Cargo.toml
[INFO] crate pbrinkmeier/stm32f7-blink 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 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/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed