[INFO] updating cached repository https://github.com/suhanyujie/hello_cargo [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] d896e35a4de9a210e78119bafd57e01068f920f7 [INFO] checking suhanyujie/hello_cargo against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo" "/workspace/builds/worker-2/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/suhanyujie/hello_cargo on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/suhanyujie/hello_cargo [INFO] finished tweaking git repo https://github.com/suhanyujie/hello_cargo [INFO] tweaked toml for git repo https://github.com/suhanyujie/hello_cargo written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/suhanyujie/hello_cargo already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 3fdde5e90488c23a4acade8248773b2ba085414d2c038a05012c768aae64a101 [INFO] running `"docker" "start" "-a" "3fdde5e90488c23a4acade8248773b2ba085414d2c038a05012c768aae64a101"` [INFO] [stderr] Compiling libc v0.2.47 [INFO] [stderr] Compiling proc-macro2 v0.4.25 [INFO] [stderr] Compiling serde v1.0.84 [INFO] [stderr] Checking encode_unicode v0.3.5 [INFO] [stderr] Compiling memchr v2.1.2 [INFO] [stderr] Checking term v0.5.1 [INFO] [stderr] Compiling quote v0.6.10 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking rand v0.4.5 [INFO] [stderr] Checking clap v2.32.0 [INFO] [stderr] Compiling syn v0.15.26 [INFO] [stderr] Checking csv-core v0.1.5 [INFO] [stderr] Checking rand v0.3.22 [INFO] [stderr] Compiling structopt-derive v0.2.14 [INFO] [stderr] Compiling serde_derive v1.0.84 [INFO] [stderr] Checking csv v1.0.5 [INFO] [stderr] Checking bincode v1.0.1 [INFO] [stderr] Checking structopt v0.2.14 [INFO] [stderr] Checking prettytable-rs v0.8.0 [INFO] [stderr] Checking hello_cargo v0.1.0 (/opt/rustwide/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 52.59s [INFO] running `"docker" "inspect" "3fdde5e90488c23a4acade8248773b2ba085414d2c038a05012c768aae64a101"` [INFO] running `"docker" "rm" "-f" "3fdde5e90488c23a4acade8248773b2ba085414d2c038a05012c768aae64a101"` [INFO] [stdout] 3fdde5e90488c23a4acade8248773b2ba085414d2c038a05012c768aae64a101