[INFO] updating cached repository sajattack/uf2conv-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sajattack/uf2conv-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sajattack/uf2conv-rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/sajattack/uf2conv-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/sajattack/uf2conv-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sajattack/uf2conv-rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 645492f4775f3711a224ae9b96e829efd9f4a41c
[INFO] sha for GitHub repo sajattack/uf2conv-rs: 645492f4775f3711a224ae9b96e829efd9f4a41c
[INFO] validating manifest of sajattack/uf2conv-rs on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sajattack/uf2conv-rs on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sajattack/uf2conv-rs
[INFO] finished frobbing sajattack/uf2conv-rs
[INFO] frobbed toml for sajattack/uf2conv-rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/sajattack/uf2conv-rs/Cargo.toml
[INFO] started frobbing sajattack/uf2conv-rs
[INFO] finished frobbing sajattack/uf2conv-rs
[INFO] frobbed toml for sajattack/uf2conv-rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs/Cargo.toml
[INFO] crate sajattack/uf2conv-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sajattack/uf2conv-rs against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3ee9cbabe6a432ceff18708dd17194d55d9ddad060bbb29c162da6a3824d1119
[INFO] running `"docker" "start" "-a" "3ee9cbabe6a432ceff18708dd17194d55d9ddad060bbb29c162da6a3824d1119"`
[INFO] [stderr]    Compiling uf2conv-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut chunk = match bytes.get(ptr as usize..ptr as usize+256) {
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "3ee9cbabe6a432ceff18708dd17194d55d9ddad060bbb29c162da6a3824d1119"`
[INFO] running `"docker" "rm" "-f" "3ee9cbabe6a432ceff18708dd17194d55d9ddad060bbb29c162da6a3824d1119"`
[INFO] [stdout] 3ee9cbabe6a432ceff18708dd17194d55d9ddad060bbb29c162da6a3824d1119
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 34c4d60faa233ad63d82b40acb2088942c13c9fb36cebf807a382c18e310156a
[INFO] running `"docker" "start" "-a" "34c4d60faa233ad63d82b40acb2088942c13c9fb36cebf807a382c18e310156a"`
[INFO] [stderr]    Compiling uf2conv-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:76:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |         let mut chunk = match bytes.get(ptr as usize..ptr as usize+256) {
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "34c4d60faa233ad63d82b40acb2088942c13c9fb36cebf807a382c18e310156a"`
[INFO] running `"docker" "rm" "-f" "34c4d60faa233ad63d82b40acb2088942c13c9fb36cebf807a382c18e310156a"`
[INFO] [stdout] 34c4d60faa233ad63d82b40acb2088942c13c9fb36cebf807a382c18e310156a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/sajattack/uf2conv-rs:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 47b3261670ac9ff638cc3bae660c549bded528b7c591c3750b45c2b4d0ba861a
[INFO] running `"docker" "start" "-a" "47b3261670ac9ff638cc3bae660c549bded528b7c591c3750b45c2b4d0ba861a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/uf2conv_rs-e8005ea13daebf5c
[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" "47b3261670ac9ff638cc3bae660c549bded528b7c591c3750b45c2b4d0ba861a"`
[INFO] running `"docker" "rm" "-f" "47b3261670ac9ff638cc3bae660c549bded528b7c591c3750b45c2b4d0ba861a"`
[INFO] [stdout] 47b3261670ac9ff638cc3bae660c549bded528b7c591c3750b45c2b4d0ba861a