[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-1.37-6/sources/1.36.0/gh/matklad/jump-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/matklad/jump-app'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/matklad/jump-app" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/matklad/jump-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of matklad/jump-app 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 matklad/jump-app
[INFO] finished frobbing matklad/jump-app
[INFO] frobbed toml for matklad/jump-app written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing matklad/jump-app 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-2/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/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] f8a00738c63c2cac5e40eaf2988126ae0c0f6ea899d052cd1c5eadd6c1d015cb
[INFO] running `"docker" "start" "-a" "f8a00738c63c2cac5e40eaf2988126ae0c0f6ea899d052cd1c5eadd6c1d015cb"`
[INFO] [stderr]    Compiling nix v0.9.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling shared_child v0.3.2
[INFO] [stderr]    Compiling backtrace v0.3.5
[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 13.29s
[INFO] running `"docker" "inspect" "f8a00738c63c2cac5e40eaf2988126ae0c0f6ea899d052cd1c5eadd6c1d015cb"`
[INFO] running `"docker" "rm" "-f" "f8a00738c63c2cac5e40eaf2988126ae0c0f6ea899d052cd1c5eadd6c1d015cb"`
[INFO] [stdout] f8a00738c63c2cac5e40eaf2988126ae0c0f6ea899d052cd1c5eadd6c1d015cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/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/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] e76f68b5d03512a926b53dfc260a8acbe2a61db42f0eee21ff90690c540fb675
[INFO] running `"docker" "start" "-a" "e76f68b5d03512a926b53dfc260a8acbe2a61db42f0eee21ff90690c540fb675"`
[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 1.05s
[INFO] running `"docker" "inspect" "e76f68b5d03512a926b53dfc260a8acbe2a61db42f0eee21ff90690c540fb675"`
[INFO] running `"docker" "rm" "-f" "e76f68b5d03512a926b53dfc260a8acbe2a61db42f0eee21ff90690c540fb675"`
[INFO] [stdout] e76f68b5d03512a926b53dfc260a8acbe2a61db42f0eee21ff90690c540fb675
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/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/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 23ff4ca51be67865edf519ae7c294167bf8dce3f9152d7c4d1999df1c2eaa4bf
[INFO] running `"docker" "start" "-a" "23ff4ca51be67865edf519ae7c294167bf8dce3f9152d7c4d1999df1c2eaa4bf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/jump_app-765870bdf414edb9
[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" "23ff4ca51be67865edf519ae7c294167bf8dce3f9152d7c4d1999df1c2eaa4bf"`
[INFO] running `"docker" "rm" "-f" "23ff4ca51be67865edf519ae7c294167bf8dce3f9152d7c4d1999df1c2eaa4bf"`
[INFO] [stdout] 23ff4ca51be67865edf519ae7c294167bf8dce3f9152d7c4d1999df1c2eaa4bf