[INFO] cloning repository jonlamb-gh/oxcc
[INFO] running `"git" "clone" "--bare" "git://github.com/jonlamb-gh/oxcc.git" "work/cache/sources/gh/jonlamb-gh/oxcc"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/jonlamb-gh/oxcc'...
[INFO] running `"git" "clone" "work/cache/sources/gh/jonlamb-gh/oxcc" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/jonlamb-gh/oxcc"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/jonlamb-gh/oxcc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jonlamb-gh/oxcc" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/jonlamb-gh/oxcc"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/jonlamb-gh/oxcc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bc972136b189735a6f59543b665c92bb39f6501c
[INFO] sha for GitHub repo jonlamb-gh/oxcc: bc972136b189735a6f59543b665c92bb39f6501c
[INFO] validating manifest of jonlamb-gh/oxcc on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jonlamb-gh/oxcc on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jonlamb-gh/oxcc
[INFO] finished frobbing jonlamb-gh/oxcc
[INFO] frobbed toml for jonlamb-gh/oxcc written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/jonlamb-gh/oxcc/Cargo.toml
[INFO] started frobbing jonlamb-gh/oxcc
[INFO] finished frobbing jonlamb-gh/oxcc
[INFO] frobbed toml for jonlamb-gh/oxcc written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/jonlamb-gh/oxcc/Cargo.toml
[INFO] crate jonlamb-gh/oxcc has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-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=-Tlink.x -C linker=rust-lld -Z linker-flavor=ld.lld --target thumbv7em-none-eabihf --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/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed