[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/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/suhanyujie/hello_cargo"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/suhanyujie/hello_cargo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/suhanyujie/hello_cargo" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/suhanyujie/hello_cargo"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/suhanyujie/hello_cargo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a7afc8541eb5e5719222efcb19658af3572d93d4
[INFO] sha for GitHub repo suhanyujie/hello_cargo: a7afc8541eb5e5719222efcb19658af3572d93d4
[INFO] validating manifest of suhanyujie/hello_cargo on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of suhanyujie/hello_cargo on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-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-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/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-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking suhanyujie/hello_cargo against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-5/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/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" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c1e8950e42ff6a1baf2e8ca775ced9044a290e57344337ea6844ac7d6a0c4ade
[INFO] running `"docker" "start" "-a" "c1e8950e42ff6a1baf2e8ca775ced9044a290e57344337ea6844ac7d6a0c4ade"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]     Checking encode_unicode v0.3.5
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand v0.4.5
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]     Checking csv v1.0.5
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]     Checking structopt v0.2.14
[INFO] [stderr]     Checking 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: 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] 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 35.07s
[INFO] running `"docker" "inspect" "c1e8950e42ff6a1baf2e8ca775ced9044a290e57344337ea6844ac7d6a0c4ade"`
[INFO] running `"docker" "rm" "-f" "c1e8950e42ff6a1baf2e8ca775ced9044a290e57344337ea6844ac7d6a0c4ade"`
[INFO] [stdout] c1e8950e42ff6a1baf2e8ca775ced9044a290e57344337ea6844ac7d6a0c4ade