[INFO] updating cached repository cdacos/lispy-in-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cdacos/lispy-in-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cdacos/lispy-in-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/lispy-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/lispy-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cdacos/lispy-in-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d173020e485caad0b631faec7be1a4372644cc87
[INFO] sha for GitHub repo cdacos/lispy-in-rust: d173020e485caad0b631faec7be1a4372644cc87
[INFO] validating manifest of cdacos/lispy-in-rust 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 cdacos/lispy-in-rust 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 cdacos/lispy-in-rust
[INFO] finished frobbing cdacos/lispy-in-rust
[INFO] frobbed toml for cdacos/lispy-in-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/cdacos/lispy-in-rust/Cargo.toml
[INFO] started frobbing cdacos/lispy-in-rust
[INFO] finished frobbing cdacos/lispy-in-rust
[INFO] frobbed toml for cdacos/lispy-in-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust/Cargo.toml
[INFO] crate cdacos/lispy-in-rust already has a lockfile, it will not be regenerated
[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 cdacos/lispy-in-rust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3773906d68e0c8686fbec600d6df2c6fbd2bf9b88cbb10740b39c60abb726674
[INFO] running `"docker" "start" "-a" "3773906d68e0c8686fbec600d6df2c6fbd2bf9b88cbb10740b39c60abb726674"`
[INFO] [stderr]    Compiling lispy-in-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/functions/operators.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 |             let mut previous;
[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 1.84s
[INFO] running `"docker" "inspect" "3773906d68e0c8686fbec600d6df2c6fbd2bf9b88cbb10740b39c60abb726674"`
[INFO] running `"docker" "rm" "-f" "3773906d68e0c8686fbec600d6df2c6fbd2bf9b88cbb10740b39c60abb726674"`
[INFO] [stdout] 3773906d68e0c8686fbec600d6df2c6fbd2bf9b88cbb10740b39c60abb726674
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] da2f9c081651d49dc62e52e2807bc76c16573474ff3eac3452b21f290ffe9bc3
[INFO] running `"docker" "start" "-a" "da2f9c081651d49dc62e52e2807bc76c16573474ff3eac3452b21f290ffe9bc3"`
[INFO] [stderr]    Compiling lispy-in-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/functions/operators.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 |             let mut previous;
[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 0.93s
[INFO] running `"docker" "inspect" "da2f9c081651d49dc62e52e2807bc76c16573474ff3eac3452b21f290ffe9bc3"`
[INFO] running `"docker" "rm" "-f" "da2f9c081651d49dc62e52e2807bc76c16573474ff3eac3452b21f290ffe9bc3"`
[INFO] [stdout] da2f9c081651d49dc62e52e2807bc76c16573474ff3eac3452b21f290ffe9bc3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cdacos/lispy-in-rust:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 19af7c04400e200f25c3c41fce477c025dab125ac4ca9ec22c6c249e0237d05a
[INFO] running `"docker" "start" "-a" "19af7c04400e200f25c3c41fce477c025dab125ac4ca9ec22c6c249e0237d05a"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lispy_in_rust-35d5331fd382ae65
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "19af7c04400e200f25c3c41fce477c025dab125ac4ca9ec22c6c249e0237d05a"`
[INFO] running `"docker" "rm" "-f" "19af7c04400e200f25c3c41fce477c025dab125ac4ca9ec22c6c249e0237d05a"`
[INFO] [stdout] 19af7c04400e200f25c3c41fce477c025dab125ac4ca9ec22c6c249e0237d05a