[INFO] updating cached repository pietrocarbo/rust_first_steps
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pietrocarbo/rust_first_steps
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pietrocarbo/rust_first_steps" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pietrocarbo/rust_first_steps" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/pietrocarbo/rust_first_steps"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/pietrocarbo/rust_first_steps'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab44a82cc79245986e93b857b57d532f63df8a11
[INFO] sha for GitHub repo pietrocarbo/rust_first_steps: ab44a82cc79245986e93b857b57d532f63df8a11
[INFO] validating manifest of pietrocarbo/rust_first_steps on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pietrocarbo/rust_first_steps on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pietrocarbo/rust_first_steps
[INFO] finished frobbing pietrocarbo/rust_first_steps
[INFO] frobbed toml for pietrocarbo/rust_first_steps written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps/Cargo.toml
[INFO] started frobbing pietrocarbo/rust_first_steps
[INFO] finished frobbing pietrocarbo/rust_first_steps
[INFO] frobbed toml for pietrocarbo/rust_first_steps written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/pietrocarbo/rust_first_steps/Cargo.toml
[INFO] crate pietrocarbo/rust_first_steps has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pietrocarbo/rust_first_steps against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 4928206c2865aff61e2d65814e4317ea6d3a1ad287a215224defe7047e23a30d
[INFO] running `"docker" "start" "-a" "4928206c2865aff61e2d65814e4317ea6d3a1ad287a215224defe7047e23a30d"`
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling presentation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `file_parse_verbose`
[INFO] [stderr]   --> src/bin/3_error_IO.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn file_parse_verbose<P: AsRef<Path>>(file_path: P) -> Result<i32, CustomError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `3_error_IO` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `3_error_io`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.75s
[INFO] running `"docker" "inspect" "4928206c2865aff61e2d65814e4317ea6d3a1ad287a215224defe7047e23a30d"`
[INFO] running `"docker" "rm" "-f" "4928206c2865aff61e2d65814e4317ea6d3a1ad287a215224defe7047e23a30d"`
[INFO] [stdout] 4928206c2865aff61e2d65814e4317ea6d3a1ad287a215224defe7047e23a30d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7bea97b360d6a59411fad9e889a34134179a4514e7577d1e2ee623754adcef43
[INFO] running `"docker" "start" "-a" "7bea97b360d6a59411fad9e889a34134179a4514e7577d1e2ee623754adcef43"`
[INFO] [stderr]    Compiling presentation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `file_parse_verbose`
[INFO] [stderr]   --> src/bin/3_error_IO.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn file_parse_verbose<P: AsRef<Path>>(file_path: P) -> Result<i32, CustomError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `3_error_IO` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `3_error_io`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "7bea97b360d6a59411fad9e889a34134179a4514e7577d1e2ee623754adcef43"`
[INFO] running `"docker" "rm" "-f" "7bea97b360d6a59411fad9e889a34134179a4514e7577d1e2ee623754adcef43"`
[INFO] [stdout] 7bea97b360d6a59411fad9e889a34134179a4514e7577d1e2ee623754adcef43
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-4/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/pietrocarbo/rust_first_steps:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] 29e7b74d280023adb7bfb4714bd27e34f510f8a37464392eb142d88c53aeb3fd
[INFO] running `"docker" "start" "-a" "29e7b74d280023adb7bfb4714bd27e34f510f8a37464392eb142d88c53aeb3fd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_linked_list-56c5274ae1519748
[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]      Running /opt/crater/target/debug/deps/2_generics-1073c63534efb390
[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]      Running /opt/crater/target/debug/deps/3_error_IO-b5068d54ed153947
[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]      Running /opt/crater/target/debug/deps/4_traits-12df5e395788422e
[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]      Running /opt/crater/target/debug/deps/5_closures_cacher-0f1d99a41938d531
[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" "29e7b74d280023adb7bfb4714bd27e34f510f8a37464392eb142d88c53aeb3fd"`
[INFO] running `"docker" "rm" "-f" "29e7b74d280023adb7bfb4714bd27e34f510f8a37464392eb142d88c53aeb3fd"`
[INFO] [stdout] 29e7b74d280023adb7bfb4714bd27e34f510f8a37464392eb142d88c53aeb3fd