[INFO] updating cached repository wycats/salsa-examples
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wycats/salsa-examples
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wycats/salsa-examples" "work/ex/beta-1.38-1/sources/1.37.0/gh/wycats/salsa-examples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/wycats/salsa-examples'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wycats/salsa-examples" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wycats/salsa-examples"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wycats/salsa-examples'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1829f87e55653290a993f64e4a55559ca3d232dc
[INFO] sha for GitHub repo wycats/salsa-examples: 1829f87e55653290a993f64e4a55559ca3d232dc
[INFO] validating manifest of wycats/salsa-examples 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 wycats/salsa-examples 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 wycats/salsa-examples
[INFO] finished frobbing wycats/salsa-examples
[INFO] frobbed toml for wycats/salsa-examples written to work/ex/beta-1.38-1/sources/1.37.0/gh/wycats/salsa-examples/Cargo.toml
[INFO] started frobbing wycats/salsa-examples
[INFO] finished frobbing wycats/salsa-examples
[INFO] frobbed toml for wycats/salsa-examples written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wycats/salsa-examples/Cargo.toml
[INFO] crate wycats/salsa-examples 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing wycats/salsa-examples 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/wycats/salsa-examples:/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] 2769bb947238ab81f76a04be8f2df0f4504eff649afcec254f29c33b99e16c18
[INFO] running `"docker" "start" "-a" "2769bb947238ab81f76a04be8f2df0f4504eff649afcec254f29c33b99e16c18"`
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling quote v0.6.9
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]    Compiling derive-new v0.5.5
[INFO] [stderr]    Compiling salsa v0.7.0
[INFO] [stderr]    Compiling salsa-test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(crate_visibility_modifier)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `string_by_id` should have an upper camel case name
[INFO] [stderr]   --> src/database.rs:56:16
[INFO] [stderr]    |
[INFO] [stderr] 56 |             fn string_by_id() for InternedString;
[INFO] [stderr]    |                ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `StringById`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `array_by_id` should have an upper camel case name
[INFO] [stderr]   --> src/database.rs:60:16
[INFO] [stderr]    |
[INFO] [stderr] 60 |             fn array_by_id() for InternedArray;
[INFO] [stderr]    |                ^^^^^^^^^^^ help: convert the identifier to upper camel case: `ArrayById`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `concat` should have an upper camel case name
[INFO] [stderr]   --> src/database.rs:61:16
[INFO] [stderr]    |
[INFO] [stderr] 61 |             fn concat() for ConcatString;
[INFO] [stderr]    |                ^^^^^^ help: convert the identifier to upper camel case: `Concat`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `salsa-test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2769bb947238ab81f76a04be8f2df0f4504eff649afcec254f29c33b99e16c18"`
[INFO] running `"docker" "rm" "-f" "2769bb947238ab81f76a04be8f2df0f4504eff649afcec254f29c33b99e16c18"`
[INFO] [stdout] 2769bb947238ab81f76a04be8f2df0f4504eff649afcec254f29c33b99e16c18