[INFO] cloning repository https://github.com/suhanyujie/hello_cargo [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suhanyujie/hello_cargo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ad8b723b1eb53e56c14c0ac7a919be70b4190353 [INFO] checking suhanyujie/hello_cargo against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/suhanyujie/hello_cargo on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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-7/source/Cargo.toml [INFO] crate git repo https://github.com/suhanyujie/hello_cargo already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f8e51be8a1d8f7dcfbcd4d3a1709f50b523ee3b94504559dcab6f067e9524ec1 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "f8e51be8a1d8f7dcfbcd4d3a1709f50b523ee3b94504559dcab6f067e9524ec1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f8e51be8a1d8f7dcfbcd4d3a1709f50b523ee3b94504559dcab6f067e9524ec1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f8e51be8a1d8f7dcfbcd4d3a1709f50b523ee3b94504559dcab6f067e9524ec1", kill_on_drop: false }` [INFO] [stdout] f8e51be8a1d8f7dcfbcd4d3a1709f50b523ee3b94504559dcab6f067e9524ec1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4fee0906887ede87ae7fc9005e075b5384ad9f748655c053117d87464f73444 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "f4fee0906887ede87ae7fc9005e075b5384ad9f748655c053117d87464f73444", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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 unicode-width v0.1.5 [INFO] [stderr] Checking cfg-if v0.1.6 [INFO] [stderr] Checking byteorder v1.2.7 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking ansi_term v0.11.0 [INFO] [stderr] Checking encode_unicode v0.3.5 [INFO] [stderr] Checking lazy_static v1.2.0 [INFO] [stderr] Compiling memchr v2.1.2 [INFO] [stderr] Checking textwrap v0.10.0 [INFO] [stderr] Checking term v0.5.1 [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] Compiling syn v0.15.26 [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] [stdout] warning: unused variable: `word1` [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let word1 = &my_str1[..]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_word1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:57:15 [INFO] [stdout] | [INFO] [stdout] 57 | fn slice_show(s: &str) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word1` [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let word1 = &my_str1[..]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_word1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/main.rs:57:15 [INFO] [stdout] | [INFO] [stdout] 57 | fn slice_show(s: &str) { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `User` [INFO] [stdout] --> src/main.rs:14:8 [INFO] [stdout] | [INFO] [stdout] 14 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Message` [INFO] [stdout] --> src/main.rs:20:6 [INFO] [stdout] | [INFO] [stdout] 20 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_word` [INFO] [stdout] --> src/main.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn first_word(s:&String)->&str{ [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `about_slice` [INFO] [stdout] --> src/main.rs:87:4 [INFO] [stdout] | [INFO] [stdout] 87 | fn about_slice(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `ownership_change` [INFO] [stdout] --> src/main.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn ownership_change()->String{ [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `mutable_ref_example` [INFO] [stdout] --> src/main.rs:104:4 [INFO] [stdout] | [INFO] [stdout] 104 | fn mutable_ref_example(s:&mut String){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `reference_example` [INFO] [stdout] --> src/main.rs:110:4 [INFO] [stdout] | [INFO] [stdout] 110 | fn reference_example(s:&String)->usize{ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `multipleReturnVal` [INFO] [stdout] --> src/main.rs:115:4 [INFO] [stdout] | [INFO] [stdout] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `copyDeeply` [INFO] [stdout] --> src/main.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn copyDeeply() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `five` [INFO] [stdout] --> src/main.rs:129:4 [INFO] [stdout] | [INFO] [stdout] 129 | fn five()->i32{ [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | handle(Command::from_args()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `multipleReturnVal` should have a snake case name [INFO] [stdout] --> src/main.rs:115:4 [INFO] [stdout] | [INFO] [stdout] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `copyDeeply` should have a snake case name [INFO] [stdout] --> src/main.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn copyDeeply() { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 15 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `User` [INFO] [stdout] --> src/main.rs:14:8 [INFO] [stdout] | [INFO] [stdout] 14 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Message` [INFO] [stdout] --> src/main.rs:20:6 [INFO] [stdout] | [INFO] [stdout] 20 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `first_word` [INFO] [stdout] --> src/main.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn first_word(s:&String)->&str{ [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `about_slice` [INFO] [stdout] --> src/main.rs:87:4 [INFO] [stdout] | [INFO] [stdout] 87 | fn about_slice(){ [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `ownership_change` [INFO] [stdout] --> src/main.rs:98:4 [INFO] [stdout] | [INFO] [stdout] 98 | fn ownership_change()->String{ [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `mutable_ref_example` [INFO] [stdout] --> src/main.rs:104:4 [INFO] [stdout] | [INFO] [stdout] 104 | fn mutable_ref_example(s:&mut String){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `reference_example` [INFO] [stdout] --> src/main.rs:110:4 [INFO] [stdout] | [INFO] [stdout] 110 | fn reference_example(s:&String)->usize{ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `multipleReturnVal` [INFO] [stdout] --> src/main.rs:115:4 [INFO] [stdout] | [INFO] [stdout] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `copyDeeply` [INFO] [stdout] --> src/main.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn copyDeeply() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `five` [INFO] [stdout] --> src/main.rs:129:4 [INFO] [stdout] | [INFO] [stdout] 129 | fn five()->i32{ [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | handle(Command::from_args()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `multipleReturnVal` should have a snake case name [INFO] [stdout] --> src/main.rs:115:4 [INFO] [stdout] | [INFO] [stdout] 115 | fn multipleReturnVal(s:String)->(String, usize){ [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `copyDeeply` should have a snake case name [INFO] [stdout] --> src/main.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn copyDeeply() { [INFO] [stdout] | ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 15 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 44.54s [INFO] running `Command { std: "docker" "inspect" "f4fee0906887ede87ae7fc9005e075b5384ad9f748655c053117d87464f73444", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4fee0906887ede87ae7fc9005e075b5384ad9f748655c053117d87464f73444", kill_on_drop: false }` [INFO] [stdout] f4fee0906887ede87ae7fc9005e075b5384ad9f748655c053117d87464f73444