[INFO] crate rust-rocket 0.3.5 is already in cache
[INFO] extracting crate rust-rocket 0.3.5 into work/ex/beta-1.37-6/sources/1.36.0/reg/rust-rocket/0.3.5
[INFO] extracting crate rust-rocket 0.3.5 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rust-rocket/0.3.5
[INFO] validating manifest of rust-rocket-0.3.5 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 rust-rocket-0.3.5 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 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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/rust-rocket/0.3.5/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] [stderr]     Blocking waiting for file lock on package cache lock
[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] [stderr]     Blocking waiting for file lock on package cache lock
[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 rust-rocket-0.3.5 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] b9ce1ea6970410b18fc237542069920da9f91d1651f77f510961d10c5bb8957a
[INFO] running `"docker" "start" "-a" "b9ce1ea6970410b18fc237542069920da9f91d1651f77f510961d10c5bb8957a"`
[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 1.01s
[INFO] running `"docker" "inspect" "b9ce1ea6970410b18fc237542069920da9f91d1651f77f510961d10c5bb8957a"`
[INFO] running `"docker" "rm" "-f" "b9ce1ea6970410b18fc237542069920da9f91d1651f77f510961d10c5bb8957a"`
[INFO] [stdout] b9ce1ea6970410b18fc237542069920da9f91d1651f77f510961d10c5bb8957a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 666b7860ba73840b914b0ede3fb6d3e212e98dd9aed2cb63c1d2ac495c000ddd
[INFO] running `"docker" "start" "-a" "666b7860ba73840b914b0ede3fb6d3e212e98dd9aed2cb63c1d2ac495c000ddd"`
[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 1.54s
[INFO] running `"docker" "inspect" "666b7860ba73840b914b0ede3fb6d3e212e98dd9aed2cb63c1d2ac495c000ddd"`
[INFO] running `"docker" "rm" "-f" "666b7860ba73840b914b0ede3fb6d3e212e98dd9aed2cb63c1d2ac495c000ddd"`
[INFO] [stdout] 666b7860ba73840b914b0ede3fb6d3e212e98dd9aed2cb63c1d2ac495c000ddd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 93f81eaa384b7a9378017fc9c1f4faf8c70abab3e3fa3c45ac97a8912e0341f9
[INFO] running `"docker" "start" "-a" "93f81eaa384b7a9378017fc9c1f4faf8c70abab3e3fa3c45ac97a8912e0341f9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_rocket-c8caba94185970a2
[INFO] [stderr]    Doc-tests rust-rocket
[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] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/client.rs - client::Rocket::get_track_mut (line 117) ... ok
[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/interpolation.rs - interpolation::Interpolation::interpolate (line 42) ... 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] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "93f81eaa384b7a9378017fc9c1f4faf8c70abab3e3fa3c45ac97a8912e0341f9"`
[INFO] running `"docker" "rm" "-f" "93f81eaa384b7a9378017fc9c1f4faf8c70abab3e3fa3c45ac97a8912e0341f9"`
[INFO] [stdout] 93f81eaa384b7a9378017fc9c1f4faf8c70abab3e3fa3c45ac97a8912e0341f9