[INFO] updating cached repository suhanyujie/hello_cargo [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/suhanyujie/hello_cargo [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/suhanyujie/hello_cargo" "work/ex/beta-1.38-1/sources/1.37.0/gh/suhanyujie/hello_cargo"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/suhanyujie/hello_cargo'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/suhanyujie/hello_cargo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] c583d61eda0dd79eba60c6616f2435063a02dfe6 [INFO] sha for GitHub repo suhanyujie/hello_cargo: c583d61eda0dd79eba60c6616f2435063a02dfe6 [INFO] validating manifest of suhanyujie/hello_cargo 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 suhanyujie/hello_cargo 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 suhanyujie/hello_cargo [INFO] finished frobbing suhanyujie/hello_cargo [INFO] frobbed toml for suhanyujie/hello_cargo written to work/ex/beta-1.38-1/sources/1.37.0/gh/suhanyujie/hello_cargo/Cargo.toml [INFO] started frobbing suhanyujie/hello_cargo [INFO] finished frobbing suhanyujie/hello_cargo [INFO] frobbed toml for suhanyujie/hello_cargo written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo/Cargo.toml [INFO] crate suhanyujie/hello_cargo 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 suhanyujie/hello_cargo against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo:/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-2019-08-13" "build" "--frozen"` [INFO] [stdout] 28284b61e2adbf177fb9324f8dd470bfb1d7170ae48ca65fb3ad28777c388240 [INFO] running `"docker" "start" "-a" "28284b61e2adbf177fb9324f8dd470bfb1d7170ae48ca65fb3ad28777c388240"` [INFO] [stderr] Compiling memchr v2.1.2 [INFO] [stderr] Compiling atty v0.2.11 [INFO] [stderr] Compiling bincode v1.0.1 [INFO] [stderr] Compiling structopt-derive v0.2.14 [INFO] [stderr] Compiling serde_derive v1.0.84 [INFO] [stderr] Compiling clap v2.32.0 [INFO] [stderr] Compiling csv-core v0.1.5 [INFO] [stderr] Compiling csv v1.0.5 [INFO] [stderr] Compiling prettytable-rs v0.8.0 [INFO] [stderr] Compiling structopt v0.2.14 [INFO] [stderr] Compiling hello_cargo v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `word1` [INFO] [stderr] --> src/main.rs:59:9 [INFO] [stderr] | [INFO] [stderr] 59 | let word1 = &my_str1[..]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_word1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/main.rs:57:15 [INFO] [stderr] | [INFO] [stderr] 57 | fn slice_show(s: &str) { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `User` [INFO] [stderr] --> src/main.rs:14:1 [INFO] [stderr] | [INFO] [stderr] 14 | struct User { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `Message` [INFO] [stderr] --> src/main.rs:20:1 [INFO] [stderr] | [INFO] [stderr] 20 | enum Message { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `first_word` [INFO] [stderr] --> src/main.rs:76:1 [INFO] [stderr] | [INFO] [stderr] 76 | fn first_word(s:&String)->&str{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `about_slice` [INFO] [stderr] --> src/main.rs:87:1 [INFO] [stderr] | [INFO] [stderr] 87 | fn about_slice(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `ownership_change` [INFO] [stderr] --> src/main.rs:98:1 [INFO] [stderr] | [INFO] [stderr] 98 | fn ownership_change()->String{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `mutable_ref_example` [INFO] [stderr] --> src/main.rs:104:1 [INFO] [stderr] | [INFO] [stderr] 104 | fn mutable_ref_example(s:&mut String){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `reference_example` [INFO] [stderr] --> src/main.rs:110:1 [INFO] [stderr] | [INFO] [stderr] 110 | fn reference_example(s:&String)->usize{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `multipleReturnVal` [INFO] [stderr] --> src/main.rs:115:1 [INFO] [stderr] | [INFO] [stderr] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copyDeeply` [INFO] [stderr] --> src/main.rs:121:1 [INFO] [stderr] | [INFO] [stderr] 121 | fn copyDeeply() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `five` [INFO] [stderr] --> src/main.rs:129:1 [INFO] [stderr] | [INFO] [stderr] 129 | fn five()->i32{ [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:43:9 [INFO] [stderr] | [INFO] [stderr] 43 | handle(Command::from_args()); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: function `multipleReturnVal` should have a snake case name [INFO] [stderr] --> src/main.rs:115:4 [INFO] [stderr] | [INFO] [stderr] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `copyDeeply` should have a snake case name [INFO] [stderr] --> src/main.rs:121:4 [INFO] [stderr] | [INFO] [stderr] 121 | fn copyDeeply() { [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 30.42s [INFO] running `"docker" "inspect" "28284b61e2adbf177fb9324f8dd470bfb1d7170ae48ca65fb3ad28777c388240"` [INFO] running `"docker" "rm" "-f" "28284b61e2adbf177fb9324f8dd470bfb1d7170ae48ca65fb3ad28777c388240"` [INFO] [stdout] 28284b61e2adbf177fb9324f8dd470bfb1d7170ae48ca65fb3ad28777c388240 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo:/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-2019-08-13" "test" "--frozen" "--no-run"` [INFO] [stdout] 568a10f894b30016e2a7fab0df485c386f61f3ddb8e103567c5c49e6e4e137e7 [INFO] running `"docker" "start" "-a" "568a10f894b30016e2a7fab0df485c386f61f3ddb8e103567c5c49e6e4e137e7"` [INFO] [stderr] Compiling hello_cargo v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `word1` [INFO] [stderr] --> src/main.rs:59:9 [INFO] [stderr] | [INFO] [stderr] 59 | let word1 = &my_str1[..]; [INFO] [stderr] | ^^^^^ help: consider prefixing with an underscore: `_word1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/main.rs:57:15 [INFO] [stderr] | [INFO] [stderr] 57 | fn slice_show(s: &str) { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `User` [INFO] [stderr] --> src/main.rs:14:1 [INFO] [stderr] | [INFO] [stderr] 14 | struct User { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: enum is never used: `Message` [INFO] [stderr] --> src/main.rs:20:1 [INFO] [stderr] | [INFO] [stderr] 20 | enum Message { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `first_word` [INFO] [stderr] --> src/main.rs:76:1 [INFO] [stderr] | [INFO] [stderr] 76 | fn first_word(s:&String)->&str{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `about_slice` [INFO] [stderr] --> src/main.rs:87:1 [INFO] [stderr] | [INFO] [stderr] 87 | fn about_slice(){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `ownership_change` [INFO] [stderr] --> src/main.rs:98:1 [INFO] [stderr] | [INFO] [stderr] 98 | fn ownership_change()->String{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `mutable_ref_example` [INFO] [stderr] --> src/main.rs:104:1 [INFO] [stderr] | [INFO] [stderr] 104 | fn mutable_ref_example(s:&mut String){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `reference_example` [INFO] [stderr] --> src/main.rs:110:1 [INFO] [stderr] | [INFO] [stderr] 110 | fn reference_example(s:&String)->usize{ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `multipleReturnVal` [INFO] [stderr] --> src/main.rs:115:1 [INFO] [stderr] | [INFO] [stderr] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copyDeeply` [INFO] [stderr] --> src/main.rs:121:1 [INFO] [stderr] | [INFO] [stderr] 121 | fn copyDeeply() { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `five` [INFO] [stderr] --> src/main.rs:129:1 [INFO] [stderr] | [INFO] [stderr] 129 | fn five()->i32{ [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/main.rs:43:9 [INFO] [stderr] | [INFO] [stderr] 43 | handle(Command::from_args()); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: function `multipleReturnVal` should have a snake case name [INFO] [stderr] --> src/main.rs:115:4 [INFO] [stderr] | [INFO] [stderr] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `copyDeeply` should have a snake case name [INFO] [stderr] --> src/main.rs:121:4 [INFO] [stderr] | [INFO] [stderr] 121 | fn copyDeeply() { [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.31s [INFO] running `"docker" "inspect" "568a10f894b30016e2a7fab0df485c386f61f3ddb8e103567c5c49e6e4e137e7"` [INFO] running `"docker" "rm" "-f" "568a10f894b30016e2a7fab0df485c386f61f3ddb8e103567c5c49e6e4e137e7"` [INFO] [stdout] 568a10f894b30016e2a7fab0df485c386f61f3ddb8e103567c5c49e6e4e137e7 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suhanyujie/hello_cargo:/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-2019-08-13" "test" "--frozen"` [INFO] [stdout] 3beef438bb03e5b93d333bf1a8fd61694ae1800ae0de2905f7cfa5c8b6c45d36 [INFO] running `"docker" "start" "-a" "3beef438bb03e5b93d333bf1a8fd61694ae1800ae0de2905f7cfa5c8b6c45d36"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running /opt/crater/target/debug/deps/hello_cargo-61f492f73856f879 [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" "3beef438bb03e5b93d333bf1a8fd61694ae1800ae0de2905f7cfa5c8b6c45d36"` [INFO] running `"docker" "rm" "-f" "3beef438bb03e5b93d333bf1a8fd61694ae1800ae0de2905f7cfa5c8b6c45d36"` [INFO] [stdout] 3beef438bb03e5b93d333bf1a8fd61694ae1800ae0de2905f7cfa5c8b6c45d36