[INFO] crate efm32gg11b820 0.7.0 is already in cache
[INFO] extracting crate efm32gg11b820 0.7.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/efm32gg11b820/0.7.0
[INFO] extracting crate efm32gg11b820 0.7.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/efm32gg11b820/0.7.0
[INFO] validating manifest of efm32gg11b820-0.7.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of efm32gg11b820-0.7.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing efm32gg11b820-0.7.0
[INFO] finished frobbing efm32gg11b820-0.7.0
[INFO] frobbed toml for efm32gg11b820-0.7.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/efm32gg11b820/0.7.0/Cargo.toml
[INFO] started frobbing efm32gg11b820-0.7.0
[INFO] finished frobbing efm32gg11b820-0.7.0
[INFO] frobbed toml for efm32gg11b820-0.7.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/efm32gg11b820/0.7.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing efm32gg11b820-0.7.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/efm32gg11b820/0.7.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 154a8d18bb896f22b8a3cf20f47b7701c58d93c4a59eba774900fe8af14413f7
[INFO] running `"docker" "start" "-a" "154a8d18bb896f22b8a3cf20f47b7701c58d93c4a59eba774900fe8af14413f7"`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling efm32gg11b820 v0.7.0 (/opt/crater/workdir)
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr] error: Could not compile `efm32gg11b820`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name efm32gg11b820 src/lib.rs --color never --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=43fefb2b829d39bc -C extra-filename=-43fefb2b829d39bc --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern bare_metal=/opt/crater/target/debug/deps/libbare_metal-97161d9f8c8cfaec.rmeta --extern cortex_m=/opt/crater/target/debug/deps/libcortex_m-0a03bdae545899c1.rmeta --extern vcell=/opt/crater/target/debug/deps/libvcell-d9ee2fd34f0de204.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "154a8d18bb896f22b8a3cf20f47b7701c58d93c4a59eba774900fe8af14413f7"`
[INFO] running `"docker" "rm" "-f" "154a8d18bb896f22b8a3cf20f47b7701c58d93c4a59eba774900fe8af14413f7"`
[INFO] [stdout] 154a8d18bb896f22b8a3cf20f47b7701c58d93c4a59eba774900fe8af14413f7