[INFO] crate mk20d7 0.1.1 is already in cache
[INFO] testing mk20d7-0.1.1 against 1.38.0 for beta-1.39-1
[INFO] extracting crate mk20d7 0.1.1 into work/builds/worker-5/source
[INFO] validating manifest of crates.io crate mk20d7 0.1.1 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 crates.io crate mk20d7 0.1.1
[INFO] finished tweaking crates.io crate mk20d7 0.1.1
[INFO] tweaked toml for crates.io crate mk20d7 0.1.1 written to work/builds/worker-5/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/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] 1f69b49682a430bd794a2322a18d86cf4f5c0ad4a656d61a3667a56d7c3fac6f
[INFO] running `"docker" "start" "-a" "1f69b49682a430bd794a2322a18d86cf4f5c0ad4a656d61a3667a56d7c3fac6f"`
[INFO] [stderr]    Compiling vcell v0.1.2
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling mk20d7 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr] warning: lint `private_no_mangle_statics` has been removed: `no longer a warning, `#[no_mangle]` statics always exported`
[INFO] [stderr]     --> src/lib.rs:1709:9
[INFO] [stderr]      |
[INFO] [stderr] 1709 | #[allow(private_no_mangle_statics)]
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]     --> src/lib.rs:3:9
[INFO] [stderr]      |
[INFO] [stderr] 3    | #![deny(warnings)]
[INFO] [stderr]      |         ^^^^^^^^
[INFO] [stderr]      = note: `#[warn(renamed_and_removed_lints)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mk20d7`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name mk20d7 src/lib.rs --color never --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=cb417b4cec771420 -C extra-filename=-cb417b4cec771420 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-647a3392bb77aaf1.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-041aa19cf7ddf8f8.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-88c01bb6750826c3.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "1f69b49682a430bd794a2322a18d86cf4f5c0ad4a656d61a3667a56d7c3fac6f"`
[INFO] running `"docker" "rm" "-f" "1f69b49682a430bd794a2322a18d86cf4f5c0ad4a656d61a3667a56d7c3fac6f"`
[INFO] [stdout] 1f69b49682a430bd794a2322a18d86cf4f5c0ad4a656d61a3667a56d7c3fac6f