[INFO] updating cached repository davidglivar/path_shifter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/davidglivar/path_shifter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/davidglivar/path_shifter" "work/ex/beta-1.38-1/sources/1.37.0/gh/davidglivar/path_shifter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/davidglivar/path_shifter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/davidglivar/path_shifter" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidglivar/path_shifter"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidglivar/path_shifter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 08b64888e33719fa611a5d2466cd6bd68cdb023d
[INFO] sha for GitHub repo davidglivar/path_shifter: 08b64888e33719fa611a5d2466cd6bd68cdb023d
[INFO] validating manifest of davidglivar/path_shifter 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 davidglivar/path_shifter 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 davidglivar/path_shifter
[INFO] finished frobbing davidglivar/path_shifter
[INFO] frobbed toml for davidglivar/path_shifter written to work/ex/beta-1.38-1/sources/1.37.0/gh/davidglivar/path_shifter/Cargo.toml
[INFO] started frobbing davidglivar/path_shifter
[INFO] finished frobbing davidglivar/path_shifter
[INFO] frobbed toml for davidglivar/path_shifter written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/davidglivar/path_shifter/Cargo.toml
[INFO] crate davidglivar/path_shifter 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/davidglivar/path_shifter/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] [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 davidglivar/path_shifter 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/davidglivar/path_shifter:/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] 0ef0ae3dab84b117eb37b3bc3951d2c32f6ff48777956d3152f24d25e318d9c9
[INFO] running `"docker" "start" "-a" "0ef0ae3dab84b117eb37b3bc3951d2c32f6ff48777956d3152f24d25e318d9c9"`
[INFO] [stderr]    Compiling rgb v0.8.14
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling path_shifter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut arr = json.as_array().unwrap();
[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 10.00s
[INFO] running `"docker" "inspect" "0ef0ae3dab84b117eb37b3bc3951d2c32f6ff48777956d3152f24d25e318d9c9"`
[INFO] running `"docker" "rm" "-f" "0ef0ae3dab84b117eb37b3bc3951d2c32f6ff48777956d3152f24d25e318d9c9"`
[INFO] [stdout] 0ef0ae3dab84b117eb37b3bc3951d2c32f6ff48777956d3152f24d25e318d9c9
[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/davidglivar/path_shifter:/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] 27ad082b34c529c5b7078264a1bc3894e98ca5455377a895f7c6b6881082a0e8
[INFO] running `"docker" "start" "-a" "27ad082b34c529c5b7078264a1bc3894e98ca5455377a895f7c6b6881082a0e8"`
[INFO] [stderr]    Compiling path_shifter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut arr = json.as_array().unwrap();
[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 0.81s
[INFO] running `"docker" "inspect" "27ad082b34c529c5b7078264a1bc3894e98ca5455377a895f7c6b6881082a0e8"`
[INFO] running `"docker" "rm" "-f" "27ad082b34c529c5b7078264a1bc3894e98ca5455377a895f7c6b6881082a0e8"`
[INFO] [stdout] 27ad082b34c529c5b7078264a1bc3894e98ca5455377a895f7c6b6881082a0e8
[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/davidglivar/path_shifter:/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] 8a162609837a0f0c5a315b4f645392371539464a433da4e43025cb130adcb877
[INFO] running `"docker" "start" "-a" "8a162609837a0f0c5a315b4f645392371539464a433da4e43025cb130adcb877"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/path_shifter-011a19e63c916e28
[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" "8a162609837a0f0c5a315b4f645392371539464a433da4e43025cb130adcb877"`
[INFO] running `"docker" "rm" "-f" "8a162609837a0f0c5a315b4f645392371539464a433da4e43025cb130adcb877"`
[INFO] [stdout] 8a162609837a0f0c5a315b4f645392371539464a433da4e43025cb130adcb877