[INFO] updating cached repository cgm616/couscous
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cgm616/couscous
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cgm616/couscous" "work/ex/clippy-test-run/sources/stable/gh/cgm616/couscous"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/cgm616/couscous'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cgm616/couscous" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/cgm616/couscous"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/cgm616/couscous'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f692592387d8749e984ff836a4e18c3cc42ee708
[INFO] sha for GitHub repo cgm616/couscous: f692592387d8749e984ff836a4e18c3cc42ee708
[INFO] validating manifest of cgm616/couscous on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cgm616/couscous on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cgm616/couscous
[INFO] finished frobbing cgm616/couscous
[INFO] frobbed toml for cgm616/couscous written to work/ex/clippy-test-run/sources/stable/gh/cgm616/couscous/Cargo.toml
[INFO] started frobbing cgm616/couscous
[INFO] finished frobbing cgm616/couscous
[INFO] frobbed toml for cgm616/couscous written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/cgm616/couscous/Cargo.toml
[INFO] crate cgm616/couscous has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "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 -Z pre-link-arg=-Wl,--start-group -C link-arg=-Wl,--end-group --target thumbv6m-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: the option `Z` is only accepted on the nightly compiler
[INFO] [stderr] 
[INFO] [stderr] 
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed