[INFO] crate rcir 0.3.0 is already in cache
[INFO] extracting crate rcir 0.3.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/rcir/0.3.0
[INFO] extracting crate rcir 0.3.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rcir/0.3.0
[INFO] validating manifest of rcir-0.3.0 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 rcir-0.3.0 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 rcir-0.3.0
[INFO] finished frobbing rcir-0.3.0
[INFO] frobbed toml for rcir-0.3.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rcir/0.3.0/Cargo.toml
[INFO] started frobbing rcir-0.3.0
[INFO] finished frobbing rcir-0.3.0
[INFO] frobbed toml for rcir-0.3.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rcir/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] testing rcir-0.3.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rcir/0.3.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 7db9852e55b6eaea5dbabba8cfa1284a3a3876d0cc5577f41be91221aa789571
[INFO] running `"docker" "start" "-a" "7db9852e55b6eaea5dbabba8cfa1284a3a3876d0cc5577f41be91221aa789571"`
[INFO] [stderr]    Compiling rcir v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:26:25
[INFO] [stderr]    |
[INFO] [stderr] 26 |                     let mut vc = round_votes.entry(vote).or_insert(0);
[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 0.23s
[INFO] running `"docker" "inspect" "7db9852e55b6eaea5dbabba8cfa1284a3a3876d0cc5577f41be91221aa789571"`
[INFO] running `"docker" "rm" "-f" "7db9852e55b6eaea5dbabba8cfa1284a3a3876d0cc5577f41be91221aa789571"`
[INFO] [stdout] 7db9852e55b6eaea5dbabba8cfa1284a3a3876d0cc5577f41be91221aa789571
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rcir/0.3.0:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 62a0f22afab299ce57d77d3a8b9791bbe9ef6d042ecf5922084c559760505c16
[INFO] running `"docker" "start" "-a" "62a0f22afab299ce57d77d3a8b9791bbe9ef6d042ecf5922084c559760505c16"`
[INFO] [stderr]    Compiling rcir v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:26:25
[INFO] [stderr]    |
[INFO] [stderr] 26 |                     let mut vc = round_votes.entry(vote).or_insert(0);
[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 0.87s
[INFO] running `"docker" "inspect" "62a0f22afab299ce57d77d3a8b9791bbe9ef6d042ecf5922084c559760505c16"`
[INFO] running `"docker" "rm" "-f" "62a0f22afab299ce57d77d3a8b9791bbe9ef6d042ecf5922084c559760505c16"`
[INFO] [stdout] 62a0f22afab299ce57d77d3a8b9791bbe9ef6d042ecf5922084c559760505c16
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rcir/0.3.0:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] bb7fdbccaf2bd0b2b68acfd08f10f7ca9512d2400f765ceeb4f863d4967dafac
[INFO] running `"docker" "start" "-a" "bb7fdbccaf2bd0b2b68acfd08f10f7ca9512d2400f765ceeb4f863d4967dafac"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rcir-4fe5b1f89105ce35
[INFO] [stdout] running 5 tests
[INFO] [stderr]    Doc-tests rcir
[INFO] [stdout] test tests::voters_no_votes ... ok
[INFO] [stdout] test tests::tie2 ... ok
[INFO] [stdout] test tests::tie ... ok
[INFO] [stdout] test tests::minority_majority ... ok
[INFO] [stdout] test tests::basic_run ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "bb7fdbccaf2bd0b2b68acfd08f10f7ca9512d2400f765ceeb4f863d4967dafac"`
[INFO] running `"docker" "rm" "-f" "bb7fdbccaf2bd0b2b68acfd08f10f7ca9512d2400f765ceeb4f863d4967dafac"`
[INFO] [stdout] bb7fdbccaf2bd0b2b68acfd08f10f7ca9512d2400f765ceeb4f863d4967dafac