[INFO] crate rust-rocket 0.3.5 is already in cache
[INFO] extracting crate rust-rocket 0.3.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/rust-rocket/0.3.5
[INFO] extracting crate rust-rocket 0.3.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-rocket/0.3.5
[INFO] validating manifest of rust-rocket-0.3.5 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 rust-rocket-0.3.5 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 rust-rocket-0.3.5
[INFO] finished frobbing rust-rocket-0.3.5
[INFO] frobbed toml for rust-rocket-0.3.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rust-rocket/0.3.5/Cargo.toml
[INFO] started frobbing rust-rocket-0.3.5
[INFO] finished frobbing rust-rocket-0.3.5
[INFO] frobbed toml for rust-rocket-0.3.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-rocket/0.3.5/Cargo.toml
[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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rust-rocket-0.3.5 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-rocket/0.3.5:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 508dce0bb790427078af97b99204eb885f05de3e445a400f8c73fd189f74a0e2
[INFO] running `"docker" "start" "-a" "508dce0bb790427078af97b99204eb885f05de3e445a400f8c73fd189f74a0e2"`
[INFO] [stderr]    Compiling rust-rocket v0.3.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/client.rs:232:33
[INFO] [stderr]     |
[INFO] [stderr] 232 |                             let mut track =
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/client.rs:242:33
[INFO] [stderr]     |
[INFO] [stderr] 242 |                             let mut track =
[INFO] [stderr]     |                                 ----^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "508dce0bb790427078af97b99204eb885f05de3e445a400f8c73fd189f74a0e2"`
[INFO] running `"docker" "rm" "-f" "508dce0bb790427078af97b99204eb885f05de3e445a400f8c73fd189f74a0e2"`
[INFO] [stdout] 508dce0bb790427078af97b99204eb885f05de3e445a400f8c73fd189f74a0e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-rocket/0.3.5:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6403d4569fc84de940f47219148b639774a397588a2f1fd9eb8c05c984520871
[INFO] running `"docker" "start" "-a" "6403d4569fc84de940f47219148b639774a397588a2f1fd9eb8c05c984520871"`
[INFO] [stderr]    Compiling rust-rocket v0.3.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/client.rs:232:33
[INFO] [stderr]     |
[INFO] [stderr] 232 |                             let mut track =
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/client.rs:242:33
[INFO] [stderr]     |
[INFO] [stderr] 242 |                             let mut track =
[INFO] [stderr]     |                                 ----^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `"docker" "inspect" "6403d4569fc84de940f47219148b639774a397588a2f1fd9eb8c05c984520871"`
[INFO] running `"docker" "rm" "-f" "6403d4569fc84de940f47219148b639774a397588a2f1fd9eb8c05c984520871"`
[INFO] [stdout] 6403d4569fc84de940f47219148b639774a397588a2f1fd9eb8c05c984520871
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-rocket/0.3.5:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 47b054192a8cecca1c9e367834245deeae3e35566e0e889dc30319ffa0f1c985
[INFO] running `"docker" "start" "-a" "47b054192a8cecca1c9e367834245deeae3e35566e0e889dc30319ffa0f1c985"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_rocket-7ff535a7d67c6c09
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test track::tests::test_three_keys ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust-rocket
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/client.rs - client::Rocket::new (line 60) ... ok
[INFO] [stdout] test src/client.rs - client::Rocket::connect (line 83) ... ok
[INFO] [stdout] test src/client.rs - client::Rocket::get_track_mut (line 117) ... ok
[INFO] [stdout] test src/client.rs - client::Rocket::poll_events (line 168) ... ok
[INFO] [stdout] test src/interpolation.rs - interpolation::Interpolation::interpolate (line 34) ... ok
[INFO] [stdout] test src/interpolation.rs - interpolation::Interpolation::interpolate (line 42) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "47b054192a8cecca1c9e367834245deeae3e35566e0e889dc30319ffa0f1c985"`
[INFO] running `"docker" "rm" "-f" "47b054192a8cecca1c9e367834245deeae3e35566e0e889dc30319ffa0f1c985"`
[INFO] [stdout] 47b054192a8cecca1c9e367834245deeae3e35566e0e889dc30319ffa0f1c985