[INFO] cloning repository suhanyujie/hello_cargo
[INFO] running `"git" "clone" "--bare" "git://github.com/suhanyujie/hello_cargo.git" "work/cache/sources/gh/suhanyujie/hello_cargo"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/suhanyujie/hello_cargo'...
[INFO] running `"git" "clone" "work/cache/sources/gh/suhanyujie/hello_cargo" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/suhanyujie/hello_cargo"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/suhanyujie/hello_cargo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/suhanyujie/hello_cargo" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/suhanyujie/hello_cargo"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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 master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of suhanyujie/hello_cargo on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "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/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing suhanyujie/hello_cargo against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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=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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] 181da357c0fef7afd088d294729a635c644d44f75f9e98862373414926e668c9
[INFO] running `"docker" "start" "-a" "181da357c0fef7afd088d294729a635c644d44f75f9e98862373414926e668c9"`
[INFO] [stderr]    Compiling encode_unicode v0.3.5
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling rand v0.4.5
[INFO] [stderr]    Compiling bincode v1.0.1
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling rand v0.3.22
[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 35.02s
[INFO] running `"docker" "inspect" "181da357c0fef7afd088d294729a635c644d44f75f9e98862373414926e668c9"`
[INFO] running `"docker" "rm" "-f" "181da357c0fef7afd088d294729a635c644d44f75f9e98862373414926e668c9"`
[INFO] [stdout] 181da357c0fef7afd088d294729a635c644d44f75f9e98862373414926e668c9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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=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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 538a2a6f98138a1dad1f82dea5fefb37e2f2eaf9f05bd60353655760be5d8879
[INFO] running `"docker" "start" "-a" "538a2a6f98138a1dad1f82dea5fefb37e2f2eaf9f05bd60353655760be5d8879"`
[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 1.10s
[INFO] running `"docker" "inspect" "538a2a6f98138a1dad1f82dea5fefb37e2f2eaf9f05bd60353655760be5d8879"`
[INFO] running `"docker" "rm" "-f" "538a2a6f98138a1dad1f82dea5fefb37e2f2eaf9f05bd60353655760be5d8879"`
[INFO] [stdout] 538a2a6f98138a1dad1f82dea5fefb37e2f2eaf9f05bd60353655760be5d8879
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-6/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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=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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] 47fb4000b8d1314bb89efa2e8843b9677bfb9616dc9721dd1f4d450bea7acac3
[INFO] running `"docker" "start" "-a" "47fb4000b8d1314bb89efa2e8843b9677bfb9616dc9721dd1f4d450bea7acac3"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_cargo-665eba8ce4a6b910
[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" "47fb4000b8d1314bb89efa2e8843b9677bfb9616dc9721dd1f4d450bea7acac3"`
[INFO] running `"docker" "rm" "-f" "47fb4000b8d1314bb89efa2e8843b9677bfb9616dc9721dd1f4d450bea7acac3"`
[INFO] [stdout] 47fb4000b8d1314bb89efa2e8843b9677bfb9616dc9721dd1f4d450bea7acac3