[INFO] crate lua-kit 0.1.0 is already in cache
[INFO] extracting crate lua-kit 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/lua-kit/0.1.0
[INFO] extracting crate lua-kit 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/lua-kit/0.1.0
[INFO] validating manifest of lua-kit-0.1.0 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 lua-kit-0.1.0 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 lua-kit-0.1.0
[INFO] finished frobbing lua-kit-0.1.0
[INFO] frobbed toml for lua-kit-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/lua-kit/0.1.0/Cargo.toml
[INFO] started frobbing lua-kit-0.1.0
[INFO] finished frobbing lua-kit-0.1.0
[INFO] frobbed toml for lua-kit-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/lua-kit/0.1.0/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 lua-kit-0.1.0 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-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/lua-kit/0.1.0:/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] 33e4527215f6b3a29b5f31733f281fe0ddb3c9e836544a93a318d89d5febc297
[INFO] running `"docker" "start" "-a" "33e4527215f6b3a29b5f31733f281fe0ddb3c9e836544a93a318d89d5febc297"`
[INFO] [stderr]    Compiling lua-kit v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/read.rs:44:25
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn read_all(&mut self, mut buf: &mut [u8]) -> io::Result<()> {
[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 1.07s
[INFO] running `"docker" "inspect" "33e4527215f6b3a29b5f31733f281fe0ddb3c9e836544a93a318d89d5febc297"`
[INFO] running `"docker" "rm" "-f" "33e4527215f6b3a29b5f31733f281fe0ddb3c9e836544a93a318d89d5febc297"`
[INFO] [stdout] 33e4527215f6b3a29b5f31733f281fe0ddb3c9e836544a93a318d89d5febc297
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/lua-kit/0.1.0:/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] 2c32745bcf681fdb4657882c59e6994feccd9715a9f57c93676f56290d8e84bc
[INFO] running `"docker" "start" "-a" "2c32745bcf681fdb4657882c59e6994feccd9715a9f57c93676f56290d8e84bc"`
[INFO] [stderr]    Compiling lua-kit v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/read.rs:44:25
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn read_all(&mut self, mut buf: &mut [u8]) -> io::Result<()> {
[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 0.88s
[INFO] running `"docker" "inspect" "2c32745bcf681fdb4657882c59e6994feccd9715a9f57c93676f56290d8e84bc"`
[INFO] running `"docker" "rm" "-f" "2c32745bcf681fdb4657882c59e6994feccd9715a9f57c93676f56290d8e84bc"`
[INFO] [stdout] 2c32745bcf681fdb4657882c59e6994feccd9715a9f57c93676f56290d8e84bc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/lua-kit/0.1.0:/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] 4edc805da57a2f5b81111c896168bf6dcc2d11b0620b72072650ce5b8a731bbf
[INFO] running `"docker" "start" "-a" "4edc805da57a2f5b81111c896168bf6dcc2d11b0620b72072650ce5b8a731bbf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lua_kit-9669e72d7b25bd77
[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 lua-kit
[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" "4edc805da57a2f5b81111c896168bf6dcc2d11b0620b72072650ce5b8a731bbf"`
[INFO] running `"docker" "rm" "-f" "4edc805da57a2f5b81111c896168bf6dcc2d11b0620b72072650ce5b8a731bbf"`
[INFO] [stdout] 4edc805da57a2f5b81111c896168bf6dcc2d11b0620b72072650ce5b8a731bbf