[INFO] updating cached repository ColonelPhantom/lubberts
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ColonelPhantom/lubberts
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ColonelPhantom/lubberts" "work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ColonelPhantom/lubberts" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ColonelPhantom/lubberts"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ColonelPhantom/lubberts'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bc05f79ed7d45f7b45cbeb28cb01c6545cdf757b
[INFO] sha for GitHub repo ColonelPhantom/lubberts: bc05f79ed7d45f7b45cbeb28cb01c6545cdf757b
[INFO] validating manifest of ColonelPhantom/lubberts 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 ColonelPhantom/lubberts 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 ColonelPhantom/lubberts
[INFO] finished frobbing ColonelPhantom/lubberts
[INFO] frobbed toml for ColonelPhantom/lubberts written to work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts/Cargo.toml
[INFO] started frobbing ColonelPhantom/lubberts
[INFO] finished frobbing ColonelPhantom/lubberts
[INFO] frobbed toml for ColonelPhantom/lubberts written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ColonelPhantom/lubberts/Cargo.toml
[INFO] crate ColonelPhantom/lubberts 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ColonelPhantom/lubberts against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4c00f1374c1818aad81c77d84f9ca24523c125978dfc117eca2af3c836a04ef5
[INFO] running `"docker" "start" "-a" "4c00f1374c1818aad81c77d84f9ca24523c125978dfc117eca2af3c836a04ef5"`
[INFO] [stderr]    Compiling lubberts v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/chunk.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut c = Chunk {};
[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 0.59s
[INFO] running `"docker" "inspect" "4c00f1374c1818aad81c77d84f9ca24523c125978dfc117eca2af3c836a04ef5"`
[INFO] running `"docker" "rm" "-f" "4c00f1374c1818aad81c77d84f9ca24523c125978dfc117eca2af3c836a04ef5"`
[INFO] [stdout] 4c00f1374c1818aad81c77d84f9ca24523c125978dfc117eca2af3c836a04ef5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] aac722f4d51328194b9eb8f5c1480154b3158def7f9eed2375581f7b4e765d5c
[INFO] running `"docker" "start" "-a" "aac722f4d51328194b9eb8f5c1480154b3158def7f9eed2375581f7b4e765d5c"`
[INFO] [stderr]    Compiling lubberts v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/chunk.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |         let mut c = Chunk {};
[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 0.61s
[INFO] running `"docker" "inspect" "aac722f4d51328194b9eb8f5c1480154b3158def7f9eed2375581f7b4e765d5c"`
[INFO] running `"docker" "rm" "-f" "aac722f4d51328194b9eb8f5c1480154b3158def7f9eed2375581f7b4e765d5c"`
[INFO] [stdout] aac722f4d51328194b9eb8f5c1480154b3158def7f9eed2375581f7b4e765d5c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ColonelPhantom/lubberts:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 18047581d8eacef00d9e4cdc2f162a6d2b92bcc3542e25f02897f7ed5505bbf7
[INFO] running `"docker" "start" "-a" "18047581d8eacef00d9e4cdc2f162a6d2b92bcc3542e25f02897f7ed5505bbf7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lubberts-86432a384914d38f
[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" "18047581d8eacef00d9e4cdc2f162a6d2b92bcc3542e25f02897f7ed5505bbf7"`
[INFO] running `"docker" "rm" "-f" "18047581d8eacef00d9e4cdc2f162a6d2b92bcc3542e25f02897f7ed5505bbf7"`
[INFO] [stdout] 18047581d8eacef00d9e4cdc2f162a6d2b92bcc3542e25f02897f7ed5505bbf7