[INFO] updating cached repository Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1fef6228c6db6bd218ba1be4222c4c320afba7c6
[INFO] sha for GitHub repo Rust-Mikrocontroller-Praktikum-2017/sonar-detection: 1fef6228c6db6bd218ba1be4222c4c320afba7c6
[INFO] validating manifest of Rust-Mikrocontroller-Praktikum-2017/sonar-detection on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Rust-Mikrocontroller-Praktikum-2017/sonar-detection on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] finished frobbing Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] frobbed toml for Rust-Mikrocontroller-Praktikum-2017/sonar-detection written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection/Cargo.toml
[INFO] started frobbing Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] finished frobbing Rust-Mikrocontroller-Praktikum-2017/sonar-detection
[INFO] frobbed toml for Rust-Mikrocontroller-Praktikum-2017/sonar-detection written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/Rust-Mikrocontroller-Praktikum-2017/sonar-detection/Cargo.toml
[INFO] crate Rust-Mikrocontroller-Praktikum-2017/sonar-detection already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 --target stm32f7 --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=cfg` (exit code: 1)
[INFO] [stderr] --- stderr
[INFO] [stderr] error: Error loading target specification: Field target-c-int-width in target specification is required
[INFO] [stderr]   |
[INFO] [stderr]   = help: Use `--print target-list` for a list of built-in targets
[INFO] [stderr] 
[INFO] [stderr] 
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed