[INFO] cloning repository https://github.com/shrawank039/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shrawank039/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshrawank039%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshrawank039%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 83fb802100303fe55b38a398adbc02102c77d5f0
[INFO] checking shrawank039/rust-playground against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshrawank039%2Frust-playground" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/shrawank039/rust-playground
[INFO] finished tweaking git repo https://github.com/shrawank039/rust-playground
[INFO] tweaked toml for git repo https://github.com/shrawank039/rust-playground written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shrawank039/rust-playground on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/shrawank039/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75bdd7132f19688b89a8d0c9998ea5f35d8a59845be0054b96f5b02bcddc3fe7
[INFO] running `Command { std: "docker" "start" "-a" "75bdd7132f19688b89a8d0c9998ea5f35d8a59845be0054b96f5b02bcddc3fe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75bdd7132f19688b89a8d0c9998ea5f35d8a59845be0054b96f5b02bcddc3fe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75bdd7132f19688b89a8d0c9998ea5f35d8a59845be0054b96f5b02bcddc3fe7", kill_on_drop: false }`
[INFO] [stdout] 75bdd7132f19688b89a8d0c9998ea5f35d8a59845be0054b96f5b02bcddc3fe7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0494be7aad45113ec9b0c8e2465a20ec1ee6c5ad903c6df012fe0b1d474b3dd
[INFO] running `Command { std: "docker" "start" "-a" "d0494be7aad45113ec9b0c8e2465a20ec1ee6c5ad903c6df012fe0b1d474b3dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking smallvec v1.11.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.35.1
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `make_string_not_dangle` is never used
[INFO] [stdout]   --> src/functions.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn make_string_not_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_five` is never used
[INFO] [stdout]   --> src/functions.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn add_five(num: u32) -> u32{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sub_five` is never used
[INFO] [stdout]  --> src/other/minus_function.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn sub_five(num: u32) -> u32{
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CarColor` is never used
[INFO] [stdout]  --> src/m1_enums.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum CarColor {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum GivenResult<T, E>{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOption` is never used
[INFO] [stdout]   --> src/m1_enums.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum GivenOption<T>{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_car_color_white` is never used
[INFO] [stdout]   --> src/m1_enums.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn create_car_color_white() -> CarColor {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_num_below_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn check_num_below_five(num: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_num_below_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn check_num_below_five_built_in(num: u8) -> Result<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn remainder_zero(num_check: f32) -> GivenOption<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn remainder_zero_built_in(num_check: f32) -> Option<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/m2_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `increment_sign_in_count` and `change_username` are never used
[INFO] [stdout]   --> src/m2_structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl User {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 10 |     fn increment_sign_in_count(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn change_username(&mut self, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn change_username(user: &mut User, new_username: &str){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_string_not_dangle` is never used
[INFO] [stdout]   --> src/functions.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn make_string_not_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red`, `Blue`, `Green`, and `Black` are never constructed
[INFO] [stdout]  --> src/m1_enums.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum CarColor {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 4 |     Red,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 5 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     Black,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CarColor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum GivenResult<T, E>{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOption` is never used
[INFO] [stdout]   --> src/m1_enums.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum GivenOption<T>{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_num_below_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn check_num_below_five(num: u8) -> GivenResult<u8, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn remainder_zero(num_check: f32) -> GivenOption<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `email` and `active` are never read
[INFO] [stdout]  --> src/m2_structs.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     username: String,
[INFO] [stdout] 4 |     email: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/m1_enums.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |         dbg!(check_below_five);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let _ = dbg!(check_below_five);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.40s
[INFO] running `Command { std: "docker" "inspect" "d0494be7aad45113ec9b0c8e2465a20ec1ee6c5ad903c6df012fe0b1d474b3dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0494be7aad45113ec9b0c8e2465a20ec1ee6c5ad903c6df012fe0b1d474b3dd", kill_on_drop: false }`
[INFO] [stdout] d0494be7aad45113ec9b0c8e2465a20ec1ee6c5ad903c6df012fe0b1d474b3dd
