[INFO] updating cached repository https://github.com/grenewode/i3switcher
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e64777544167799a69f09d4dca873ad0cc819da7
[INFO] testing grenewode/i3switcher against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrenewode%2Fi3switcher" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/grenewode/i3switcher on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/grenewode/i3switcher
[INFO] finished tweaking git repo https://github.com/grenewode/i3switcher
[INFO] tweaked toml for git repo https://github.com/grenewode/i3switcher written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/grenewode/i3switcher already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 612cba6048068701613e2932554cddef38063355b48b69393dd7a8435dcde4f8
[INFO] running `"docker" "start" "-a" "612cba6048068701613e2932554cddef38063355b48b69393dd7a8435dcde4f8"`
[INFO] [stderr]    Compiling i3ipc v0.8.2
[INFO] [stderr]    Compiling i3switcher v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let mut iter = workspaces.iter().rev().skip(workspaces.len() - current_idx);
[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 5.60s
[INFO] running `"docker" "inspect" "612cba6048068701613e2932554cddef38063355b48b69393dd7a8435dcde4f8"`
[INFO] running `"docker" "rm" "-f" "612cba6048068701613e2932554cddef38063355b48b69393dd7a8435dcde4f8"`
[INFO] [stdout] 612cba6048068701613e2932554cddef38063355b48b69393dd7a8435dcde4f8
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 076a1a06ab5fcdb4518b90997e0c45c23cc79f80e706b4efe90d9898bf1a070e
[INFO] running `"docker" "start" "-a" "076a1a06ab5fcdb4518b90997e0c45c23cc79f80e706b4efe90d9898bf1a070e"`
[INFO] [stderr]    Compiling i3switcher v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let mut iter = workspaces.iter().rev().skip(workspaces.len() - current_idx);
[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 3.79s
[INFO] running `"docker" "inspect" "076a1a06ab5fcdb4518b90997e0c45c23cc79f80e706b4efe90d9898bf1a070e"`
[INFO] running `"docker" "rm" "-f" "076a1a06ab5fcdb4518b90997e0c45c23cc79f80e706b4efe90d9898bf1a070e"`
[INFO] [stdout] 076a1a06ab5fcdb4518b90997e0c45c23cc79f80e706b4efe90d9898bf1a070e
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 4083777f0faa38bef500ef1ecdb6e06fc41d590131e3c6f5356be3e4e74e6000
[INFO] running `"docker" "start" "-a" "4083777f0faa38bef500ef1ecdb6e06fc41d590131e3c6f5356be3e4e74e6000"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/i3switcher-24b00121934c9d78
[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" "4083777f0faa38bef500ef1ecdb6e06fc41d590131e3c6f5356be3e4e74e6000"`
[INFO] running `"docker" "rm" "-f" "4083777f0faa38bef500ef1ecdb6e06fc41d590131e3c6f5356be3e4e74e6000"`
[INFO] [stdout] 4083777f0faa38bef500ef1ecdb6e06fc41d590131e3c6f5356be3e4e74e6000