[INFO] updating cached repository https://github.com/RustyGecko/sensor-tracker
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 453510e4acec853e4a3229d488c093e91a596b69
[INFO] testing RustyGecko/sensor-tracker against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FRustyGecko%2Fsensor-tracker" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RustyGecko/sensor-tracker on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/RustyGecko/sensor-tracker
[INFO] finished tweaking git repo https://github.com/RustyGecko/sensor-tracker
[INFO] tweaked toml for git repo https://github.com/RustyGecko/sensor-tracker written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/RustyGecko/sensor-tracker already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rust-alloc.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/cmsis.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rust-collections.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rust-core.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/emdrv.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/emlib.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/kits.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rust-libc.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/modules.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/sensors.git`
[INFO] [stderr]     Updating git repository `https://github.com/sondrele/rust-src.git`
[INFO] [stderr]     Updating git repository `https://github.com/sondrele/gcc-rs.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rust-unicode.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/rlibc.git`
[INFO] [stderr]     Updating git repository `https://github.com/RustyGecko/startup.git`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 08239829a42c27c88c8fa14d763f677b058b41cee0987ef732715673d140c099
[INFO] running `"docker" "start" "-a" "08239829a42c27c88c8fa14d763f677b058b41cee0987ef732715673d140c099"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling sensor-tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0259]: the name `core` is defined multiple times
[INFO] [stderr]  --> src/main.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern crate core;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^ `core` reimported here
[INFO] [stderr]   |
[INFO] [stderr]   = note: `core` must be defined only once in the type namespace of this module
[INFO] [stderr] help: you can use `as` to change the binding name of the import
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern crate core as other_core;
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `emlib`
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | extern crate emlib;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0259, E0463.
[INFO] [stderr] For more information about an error, try `rustc --explain E0259`.
[INFO] [stderr] error: Could not compile `sensor-tracker`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "08239829a42c27c88c8fa14d763f677b058b41cee0987ef732715673d140c099"`
[INFO] running `"docker" "rm" "-f" "08239829a42c27c88c8fa14d763f677b058b41cee0987ef732715673d140c099"`
[INFO] [stdout] 08239829a42c27c88c8fa14d763f677b058b41cee0987ef732715673d140c099