[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 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-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8913696d77585dff72816d3c51a0977325d49c347f9481c416af2b304a8be149
[INFO] running `"docker" "start" "-a" "8913696d77585dff72816d3c51a0977325d49c347f9481c416af2b304a8be149"`
[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 1.85s
[INFO] running `"docker" "inspect" "8913696d77585dff72816d3c51a0977325d49c347f9481c416af2b304a8be149"`
[INFO] running `"docker" "rm" "-f" "8913696d77585dff72816d3c51a0977325d49c347f9481c416af2b304a8be149"`
[INFO] [stdout] 8913696d77585dff72816d3c51a0977325d49c347f9481c416af2b304a8be149
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] d3a80e760e2cd38abbc02e53358fad99a83c1a87d15cec25f57da2a333078487
[INFO] running `"docker" "start" "-a" "d3a80e760e2cd38abbc02e53358fad99a83c1a87d15cec25f57da2a333078487"`
[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 0.78s
[INFO] running `"docker" "inspect" "d3a80e760e2cd38abbc02e53358fad99a83c1a87d15cec25f57da2a333078487"`
[INFO] running `"docker" "rm" "-f" "d3a80e760e2cd38abbc02e53358fad99a83c1a87d15cec25f57da2a333078487"`
[INFO] [stdout] d3a80e760e2cd38abbc02e53358fad99a83c1a87d15cec25f57da2a333078487
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 44af04fca02e7c434742bd3005bfa97308596c14d9a8ab55d13367869dec42e7
[INFO] running `"docker" "start" "-a" "44af04fca02e7c434742bd3005bfa97308596c14d9a8ab55d13367869dec42e7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lispy_in_rust-4112c5531a2f655a
[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" "44af04fca02e7c434742bd3005bfa97308596c14d9a8ab55d13367869dec42e7"`
[INFO] running `"docker" "rm" "-f" "44af04fca02e7c434742bd3005bfa97308596c14d9a8ab55d13367869dec42e7"`
[INFO] [stdout] 44af04fca02e7c434742bd3005bfa97308596c14d9a8ab55d13367869dec42e7