[INFO] updating cached repository ruggeri/nedbase
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ruggeri/nedbase
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/nedbase" "work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ruggeri/nedbase" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ruggeri/nedbase"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ruggeri/nedbase'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 200c54492c2116c973e500649793241772e1cdfa
[INFO] sha for GitHub repo ruggeri/nedbase: 200c54492c2116c973e500649793241772e1cdfa
[INFO] validating manifest of ruggeri/nedbase 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 ruggeri/nedbase 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 ruggeri/nedbase
[INFO] finished frobbing ruggeri/nedbase
[INFO] frobbed toml for ruggeri/nedbase written to work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase/Cargo.toml
[INFO] started frobbing ruggeri/nedbase
[INFO] finished frobbing ruggeri/nedbase
[INFO] frobbed toml for ruggeri/nedbase written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ruggeri/nedbase/Cargo.toml
[INFO] crate ruggeri/nedbase already has a lockfile, it will not be regenerated
[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 ruggeri/nedbase against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] fb3993357b2aeb5836508f41113d35c576c1511e690e1a3dc1e13b067c116004
[INFO] running `"docker" "start" "-a" "fb3993357b2aeb5836508f41113d35c576c1511e690e1a3dc1e13b067c116004"`
[INFO] [stderr]    Compiling rand_xorshift v0.1.0
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]    Compiling smallvec v0.6.6
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling nedbase v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/btree/insertion/descend_toward_key.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut last_entry = insert_path.last_mut().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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/btree/insertion/insert.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut split_info = match insertion_result {
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.76s
[INFO] running `"docker" "inspect" "fb3993357b2aeb5836508f41113d35c576c1511e690e1a3dc1e13b067c116004"`
[INFO] running `"docker" "rm" "-f" "fb3993357b2aeb5836508f41113d35c576c1511e690e1a3dc1e13b067c116004"`
[INFO] [stdout] fb3993357b2aeb5836508f41113d35c576c1511e690e1a3dc1e13b067c116004
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] f9fd24c85fe85856c9418b276d347bf0b0235df3e95237f452d8e142d0a181dc
[INFO] running `"docker" "start" "-a" "f9fd24c85fe85856c9418b276d347bf0b0235df3e95237f452d8e142d0a181dc"`
[INFO] [stderr]    Compiling nedbase v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/btree/insertion/descend_toward_key.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut last_entry = insert_path.last_mut().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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/btree/insertion/insert.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let mut split_info = match insertion_result {
[INFO] [stderr]    |         ----^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `"docker" "inspect" "f9fd24c85fe85856c9418b276d347bf0b0235df3e95237f452d8e142d0a181dc"`
[INFO] running `"docker" "rm" "-f" "f9fd24c85fe85856c9418b276d347bf0b0235df3e95237f452d8e142d0a181dc"`
[INFO] [stdout] f9fd24c85fe85856c9418b276d347bf0b0235df3e95237f452d8e142d0a181dc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ruggeri/nedbase:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] e622a39528f8845c984faa772a713413fba433cf941ac9521b8c1327e3eaff8f
[INFO] running `"docker" "start" "-a" "e622a39528f8845c984faa772a713413fba433cf941ac9521b8c1327e3eaff8f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nedbase-92be232a01c7ed37
[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] [stderr]      Running /opt/crater/target/debug/deps/main-64b512aff108640b
[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] [stderr]    Doc-tests nedbase
[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" "e622a39528f8845c984faa772a713413fba433cf941ac9521b8c1327e3eaff8f"`
[INFO] running `"docker" "rm" "-f" "e622a39528f8845c984faa772a713413fba433cf941ac9521b8c1327e3eaff8f"`
[INFO] [stdout] e622a39528f8845c984faa772a713413fba433cf941ac9521b8c1327e3eaff8f