[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 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"` [INFO] [stdout] d49dce7787304bebe8f31e70ce8780e2e00d12451c684b993d38319eaefc4b7c [INFO] running `"docker" "start" "-a" "d49dce7787304bebe8f31e70ce8780e2e00d12451c684b993d38319eaefc4b7c"` [INFO] [stderr] Compiling proc-macro2 v0.4.25 [INFO] [stderr] Compiling memchr v2.1.2 [INFO] [stderr] Compiling term v0.5.1 [INFO] [stderr] Compiling bincode v1.0.1 [INFO] [stderr] Compiling rand v0.3.22 [INFO] [stderr] Compiling csv-core v0.1.5 [INFO] [stderr] Compiling csv v1.0.5 [INFO] [stderr] Compiling quote v0.6.10 [INFO] [stderr] Compiling syn v0.15.26 [INFO] [stderr] Compiling prettytable-rs v0.8.0 [INFO] [stderr] Compiling structopt-derive v0.2.14 [INFO] [stderr] Compiling serde_derive v1.0.84 [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 39.27s [INFO] running `"docker" "inspect" "d49dce7787304bebe8f31e70ce8780e2e00d12451c684b993d38319eaefc4b7c"` [INFO] running `"docker" "rm" "-f" "d49dce7787304bebe8f31e70ce8780e2e00d12451c684b993d38319eaefc4b7c"` [INFO] [stdout] d49dce7787304bebe8f31e70ce8780e2e00d12451c684b993d38319eaefc4b7c [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"` [INFO] [stdout] ca58978ac4ecd055f5eeca20176a0dbaa81ccb123daeb1e03ee0e7ad1c3695e6 [INFO] running `"docker" "start" "-a" "ca58978ac4ecd055f5eeca20176a0dbaa81ccb123daeb1e03ee0e7ad1c3695e6"` [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 1.35s [INFO] running `"docker" "inspect" "ca58978ac4ecd055f5eeca20176a0dbaa81ccb123daeb1e03ee0e7ad1c3695e6"` [INFO] running `"docker" "rm" "-f" "ca58978ac4ecd055f5eeca20176a0dbaa81ccb123daeb1e03ee0e7ad1c3695e6"` [INFO] [stdout] ca58978ac4ecd055f5eeca20176a0dbaa81ccb123daeb1e03ee0e7ad1c3695e6 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"` [INFO] [stdout] a701a6a7e07cbd41d75968c7a8d6971eb332eae5144b76d2876d7fd58d339931 [INFO] running `"docker" "start" "-a" "a701a6a7e07cbd41d75968c7a8d6971eb332eae5144b76d2876d7fd58d339931"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.05s [INFO] [stderr] Running /opt/crater/target/debug/deps/hello_cargo-24437139a2da12d5 [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" "a701a6a7e07cbd41d75968c7a8d6971eb332eae5144b76d2876d7fd58d339931"` [INFO] running `"docker" "rm" "-f" "a701a6a7e07cbd41d75968c7a8d6971eb332eae5144b76d2876d7fd58d339931"` [INFO] [stdout] a701a6a7e07cbd41d75968c7a8d6971eb332eae5144b76d2876d7fd58d339931