[INFO] updating cached repository qjojo/silt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/qjojo/silt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/qjojo/silt" "work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/qjojo/silt" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/qjojo/silt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/qjojo/silt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f28f84561c0aaaaf8788ca4f7a90b1b2628556e5
[INFO] sha for GitHub repo qjojo/silt: f28f84561c0aaaaf8788ca4f7a90b1b2628556e5
[INFO] validating manifest of qjojo/silt 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 qjojo/silt 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 qjojo/silt
[INFO] finished frobbing qjojo/silt
[INFO] frobbed toml for qjojo/silt written to work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt/Cargo.toml
[INFO] started frobbing qjojo/silt
[INFO] finished frobbing qjojo/silt
[INFO] frobbed toml for qjojo/silt written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/qjojo/silt/Cargo.toml
[INFO] crate qjojo/silt 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] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 qjojo/silt 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt:/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] 5078a4947cf31e10e94c987098791eae5a1d27719b7aacfa2bc4dc6e62f917e2
[INFO] running `"docker" "start" "-a" "5078a4947cf31e10e94c987098791eae5a1d27719b7aacfa2bc4dc6e62f917e2"`
[INFO] [stderr]    Compiling silt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: enum is never used: `Atom`
[INFO] [stderr]   --> src/sexpr.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub enum Atom<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_numeric`
[INFO] [stderr]   --> src/sexpr.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn is_numeric<T: FromStr>(s: &str) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         buffer.trim();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "5078a4947cf31e10e94c987098791eae5a1d27719b7aacfa2bc4dc6e62f917e2"`
[INFO] running `"docker" "rm" "-f" "5078a4947cf31e10e94c987098791eae5a1d27719b7aacfa2bc4dc6e62f917e2"`
[INFO] [stdout] 5078a4947cf31e10e94c987098791eae5a1d27719b7aacfa2bc4dc6e62f917e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt:/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] ec173a3af2a9733ffb52d03ddad1b67b49036117da32fb51baf4430eb8fef567
[INFO] running `"docker" "start" "-a" "ec173a3af2a9733ffb52d03ddad1b67b49036117da32fb51baf4430eb8fef567"`
[INFO] [stderr]    Compiling silt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: enum is never used: `Atom`
[INFO] [stderr]   --> src/sexpr.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub enum Atom<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_numeric`
[INFO] [stderr]   --> src/sexpr.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn is_numeric<T: FromStr>(s: &str) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/main.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         buffer.trim();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `"docker" "inspect" "ec173a3af2a9733ffb52d03ddad1b67b49036117da32fb51baf4430eb8fef567"`
[INFO] running `"docker" "rm" "-f" "ec173a3af2a9733ffb52d03ddad1b67b49036117da32fb51baf4430eb8fef567"`
[INFO] [stdout] ec173a3af2a9733ffb52d03ddad1b67b49036117da32fb51baf4430eb8fef567
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/qjojo/silt:/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] a21f4c67529f1b4d979d525736ebcbd3bef1cec48c363564d7ffaf594d1a8eff
[INFO] running `"docker" "start" "-a" "a21f4c67529f1b4d979d525736ebcbd3bef1cec48c363564d7ffaf594d1a8eff"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/silt-adbeeac06c6e62b4
[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" "a21f4c67529f1b4d979d525736ebcbd3bef1cec48c363564d7ffaf594d1a8eff"`
[INFO] running `"docker" "rm" "-f" "a21f4c67529f1b4d979d525736ebcbd3bef1cec48c363564d7ffaf594d1a8eff"`
[INFO] [stdout] a21f4c67529f1b4d979d525736ebcbd3bef1cec48c363564d7ffaf594d1a8eff