[INFO] crate veb-rs 0.1.1 is already in cache
[INFO] extracting crate veb-rs 0.1.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/veb-rs/0.1.1
[INFO] extracting crate veb-rs 0.1.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/veb-rs/0.1.1
[INFO] validating manifest of veb-rs-0.1.1 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 veb-rs-0.1.1 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 veb-rs-0.1.1
[INFO] finished frobbing veb-rs-0.1.1
[INFO] frobbed toml for veb-rs-0.1.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/veb-rs/0.1.1/Cargo.toml
[INFO] started frobbing veb-rs-0.1.1
[INFO] finished frobbing veb-rs-0.1.1
[INFO] frobbed toml for veb-rs-0.1.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/veb-rs/0.1.1/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 veb-rs-0.1.1 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/veb-rs/0.1.1:/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] 34310643e0b3e18e8d6ca493887c0d8fa9afb0d3d92579cb6b32d88f412d5672
[INFO] running `"docker" "start" "-a" "34310643e0b3e18e8d6ca493887c0d8fa9afb0d3d92579cb6b32d88f412d5672"`
[INFO] [stderr]    Compiling veb-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:254:21
[INFO] [stderr]     |
[INFO] [stderr] 254 |                 let mut subtree = &mut self.children[idx as usize];
[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 0.52s
[INFO] running `"docker" "inspect" "34310643e0b3e18e8d6ca493887c0d8fa9afb0d3d92579cb6b32d88f412d5672"`
[INFO] running `"docker" "rm" "-f" "34310643e0b3e18e8d6ca493887c0d8fa9afb0d3d92579cb6b32d88f412d5672"`
[INFO] [stdout] 34310643e0b3e18e8d6ca493887c0d8fa9afb0d3d92579cb6b32d88f412d5672
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/veb-rs/0.1.1:/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] 25b45b1c21ca0f15fc639609335ed11e0163c56f485d4a4f571560b298ddf8f4
[INFO] running `"docker" "start" "-a" "25b45b1c21ca0f15fc639609335ed11e0163c56f485d4a4f571560b298ddf8f4"`
[INFO] [stderr]    Compiling veb-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:254:21
[INFO] [stderr]     |
[INFO] [stderr] 254 |                 let mut subtree = &mut self.children[idx as usize];
[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 0.74s
[INFO] running `"docker" "inspect" "25b45b1c21ca0f15fc639609335ed11e0163c56f485d4a4f571560b298ddf8f4"`
[INFO] running `"docker" "rm" "-f" "25b45b1c21ca0f15fc639609335ed11e0163c56f485d4a4f571560b298ddf8f4"`
[INFO] [stdout] 25b45b1c21ca0f15fc639609335ed11e0163c56f485d4a4f571560b298ddf8f4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/veb-rs/0.1.1:/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] 061fc1e192528c74d01163306834e946c92a9fd3ac6bb393c57d4e0748aefa98
[INFO] running `"docker" "start" "-a" "061fc1e192528c74d01163306834e946c92a9fd3ac6bb393c57d4e0748aefa98"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/veb_rs-10a078da26d37990
[INFO] [stdout] running 6 tests
[INFO] [stdout] test is_empty ... ok
[INFO] [stdout] test insertion_and_has ... ok
[INFO] [stdout] test find_next ... ok
[INFO] [stdout] test delete ... ok
[INFO] [stdout] test creation ... ok
[INFO] [stdout] test creation_fail ... ok
[INFO] [stderr]    Doc-tests veb-rs
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 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" "061fc1e192528c74d01163306834e946c92a9fd3ac6bb393c57d4e0748aefa98"`
[INFO] running `"docker" "rm" "-f" "061fc1e192528c74d01163306834e946c92a9fd3ac6bb393c57d4e0748aefa98"`
[INFO] [stdout] 061fc1e192528c74d01163306834e946c92a9fd3ac6bb393c57d4e0748aefa98