[INFO] cloning repository sgysh/laurel
[INFO] running `"git" "clone" "--bare" "git://github.com/sgysh/laurel.git" "work/cache/sources/gh/sgysh/laurel"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/sgysh/laurel'...
[INFO] running `"git" "clone" "work/cache/sources/gh/sgysh/laurel" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/sgysh/laurel"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/sgysh/laurel'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sgysh/laurel" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/sgysh/laurel"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/sgysh/laurel'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fa0c199cf464ea526d269ad8cb7a3a765f4d8f05
[INFO] sha for GitHub repo sgysh/laurel: fa0c199cf464ea526d269ad8cb7a3a765f4d8f05
[INFO] validating manifest of sgysh/laurel 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 sgysh/laurel 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 sgysh/laurel
[INFO] finished frobbing sgysh/laurel
[INFO] frobbed toml for sgysh/laurel written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/sgysh/laurel/Cargo.toml
[INFO] started frobbing sgysh/laurel
[INFO] finished frobbing sgysh/laurel
[INFO] frobbed toml for sgysh/laurel written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/sgysh/laurel/Cargo.toml
[INFO] crate sgysh/laurel 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] error: failed to run `rustc` to learn about target-specific information
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc - --crate-name ___ --print=file-names -C link-arg=-Tlm3s811evb_layout.ld -C linker=arm-none-eabi-ld -Z linker-flavor=ld -Z thinlto=no --target thumbv7m-none-eabi --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro` (exit code: 1)
[INFO] [stderr] --- stderr
[INFO] [stderr] error: unknown debugging option: `linker-flavor`
[INFO] [stderr] 
[INFO] [stderr] 
[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