[INFO] updating cached repository exploids/rpi_matrix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/exploids/rpi_matrix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/exploids/rpi_matrix" "work/ex/beta-1.38-1/sources/1.37.0/gh/exploids/rpi_matrix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/exploids/rpi_matrix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/exploids/rpi_matrix" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/exploids/rpi_matrix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/exploids/rpi_matrix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f9dbc10621906f86ed9009d0fd9c9e0d5e03b498
[INFO] sha for GitHub repo exploids/rpi_matrix: f9dbc10621906f86ed9009d0fd9c9e0d5e03b498
[INFO] validating manifest of exploids/rpi_matrix 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 exploids/rpi_matrix 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 exploids/rpi_matrix
[INFO] finished frobbing exploids/rpi_matrix
[INFO] frobbed toml for exploids/rpi_matrix written to work/ex/beta-1.38-1/sources/1.37.0/gh/exploids/rpi_matrix/Cargo.toml
[INFO] started frobbing exploids/rpi_matrix
[INFO] finished frobbing exploids/rpi_matrix
[INFO] frobbed toml for exploids/rpi_matrix written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/exploids/rpi_matrix/Cargo.toml
[INFO] crate exploids/rpi_matrix already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing exploids/rpi_matrix 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/gh/exploids/rpi_matrix:/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] 4bd1327da55c5fb85783e173859de0ccb37506fc2ef73b4d2a4ef07419237416
[INFO] running `"docker" "start" "-a" "4bd1327da55c5fb85783e173859de0ccb37506fc2ef73b4d2a4ef07419237416"`
[INFO] [stderr]    Compiling rppal v0.8.1
[INFO] [stderr]    Compiling rpi_matrix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Level`
[INFO] [stderr]  --> src/main.rs:6:31
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rppal::gpio::{Gpio, Mode, Level};
[INFO] [stderr]   |                               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for x in 0..100 {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.67s
[INFO] running `"docker" "inspect" "4bd1327da55c5fb85783e173859de0ccb37506fc2ef73b4d2a4ef07419237416"`
[INFO] running `"docker" "rm" "-f" "4bd1327da55c5fb85783e173859de0ccb37506fc2ef73b4d2a4ef07419237416"`
[INFO] [stdout] 4bd1327da55c5fb85783e173859de0ccb37506fc2ef73b4d2a4ef07419237416
[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/gh/exploids/rpi_matrix:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] d8662516c1c44a28d9f1ea18729b92e0e2b658d077f0ac24464cc76e69373ffd
[INFO] running `"docker" "start" "-a" "d8662516c1c44a28d9f1ea18729b92e0e2b658d077f0ac24464cc76e69373ffd"`
[INFO] [stderr]    Compiling rpi_matrix v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Level`
[INFO] [stderr]  --> src/main.rs:6:31
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rppal::gpio::{Gpio, Mode, Level};
[INFO] [stderr]   |                               ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for x in 0..100 {
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "d8662516c1c44a28d9f1ea18729b92e0e2b658d077f0ac24464cc76e69373ffd"`
[INFO] running `"docker" "rm" "-f" "d8662516c1c44a28d9f1ea18729b92e0e2b658d077f0ac24464cc76e69373ffd"`
[INFO] [stdout] d8662516c1c44a28d9f1ea18729b92e0e2b658d077f0ac24464cc76e69373ffd
[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/gh/exploids/rpi_matrix:/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" "test" "--frozen"`
[INFO] [stdout] d5dfa879a76a1507e635def2f47bf5eb07405793dcef9617a1253e4a4c3f0708
[INFO] running `"docker" "start" "-a" "d5dfa879a76a1507e635def2f47bf5eb07405793dcef9617a1253e4a4c3f0708"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rpi_matrix-3b543357e7f8b5fe
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d5dfa879a76a1507e635def2f47bf5eb07405793dcef9617a1253e4a4c3f0708"`
[INFO] running `"docker" "rm" "-f" "d5dfa879a76a1507e635def2f47bf5eb07405793dcef9617a1253e4a4c3f0708"`
[INFO] [stdout] d5dfa879a76a1507e635def2f47bf5eb07405793dcef9617a1253e4a4c3f0708