[INFO] updating cached repository matklad/jump-app
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/matklad/jump-app
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/matklad/jump-app" "work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matklad/jump-app" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matklad/jump-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matklad/jump-app'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ac21dc04b388b37ef222565980347f4a358fe2a9
[INFO] sha for GitHub repo matklad/jump-app: ac21dc04b388b37ef222565980347f4a358fe2a9
[INFO] validating manifest of matklad/jump-app 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 matklad/jump-app 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 matklad/jump-app
[INFO] finished frobbing matklad/jump-app
[INFO] frobbed toml for matklad/jump-app written to work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app/Cargo.toml
[INFO] started frobbing matklad/jump-app
[INFO] finished frobbing matklad/jump-app
[INFO] frobbed toml for matklad/jump-app written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/matklad/jump-app/Cargo.toml
[INFO] crate matklad/jump-app 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing matklad/jump-app 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app:/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] 3a3cdf3e67a07be36a093de731d0479c813ef50d677484bbe7d302e688ef7ad3
[INFO] running `"docker" "start" "-a" "3a3cdf3e67a07be36a093de731d0479c813ef50d677484bbe7d302e688ef7ad3"`
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling shared_child v0.3.2
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling os_pipe v0.6.0
[INFO] [stderr]    Compiling duct v0.10.0
[INFO] [stderr]    Compiling jump-app v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let mut prog = matches.values_of("prog").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 11.52s
[INFO] running `"docker" "inspect" "3a3cdf3e67a07be36a093de731d0479c813ef50d677484bbe7d302e688ef7ad3"`
[INFO] running `"docker" "rm" "-f" "3a3cdf3e67a07be36a093de731d0479c813ef50d677484bbe7d302e688ef7ad3"`
[INFO] [stdout] 3a3cdf3e67a07be36a093de731d0479c813ef50d677484bbe7d302e688ef7ad3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app:/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] 0a2b8e56209fc12acab2a30a5609842725b18afcf4ca4210a7b968504d738465
[INFO] running `"docker" "start" "-a" "0a2b8e56209fc12acab2a30a5609842725b18afcf4ca4210a7b968504d738465"`
[INFO] [stderr]    Compiling jump-app v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let mut prog = matches.values_of("prog").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 1.11s
[INFO] running `"docker" "inspect" "0a2b8e56209fc12acab2a30a5609842725b18afcf4ca4210a7b968504d738465"`
[INFO] running `"docker" "rm" "-f" "0a2b8e56209fc12acab2a30a5609842725b18afcf4ca4210a7b968504d738465"`
[INFO] [stdout] 0a2b8e56209fc12acab2a30a5609842725b18afcf4ca4210a7b968504d738465
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/matklad/jump-app:/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] 1e008e1347ba3e7dabedffdfd5b054fb7cfb218918389d4e6e43be8d9835edd1
[INFO] running `"docker" "start" "-a" "1e008e1347ba3e7dabedffdfd5b054fb7cfb218918389d4e6e43be8d9835edd1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jump_app-dee9d518c46cbc07
[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" "1e008e1347ba3e7dabedffdfd5b054fb7cfb218918389d4e6e43be8d9835edd1"`
[INFO] running `"docker" "rm" "-f" "1e008e1347ba3e7dabedffdfd5b054fb7cfb218918389d4e6e43be8d9835edd1"`
[INFO] [stdout] 1e008e1347ba3e7dabedffdfd5b054fb7cfb218918389d4e6e43be8d9835edd1