[INFO] cloning repository https://github.com/ozgursarikamis/rust-sandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ozgursarikamis/rust-sandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fozgursarikamis%2Frust-sandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fozgursarikamis%2Frust-sandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eebd0405f1e985899800b8ef8982f56969dff609
[INFO] checking ozgursarikamis/rust-sandbox against try#4e55a504843955c97eb06907c71f6f3e99208021 for pr-146978
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fozgursarikamis%2Frust-sandbox" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ozgursarikamis/rust-sandbox
[INFO] finished tweaking git repo https://github.com/ozgursarikamis/rust-sandbox
[INFO] tweaked toml for git repo https://github.com/ozgursarikamis/rust-sandbox written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ozgursarikamis/rust-sandbox on toolchain 4e55a504843955c97eb06907c71f6f3e99208021
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ozgursarikamis/rust-sandbox 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" "+4e55a504843955c97eb06907c71f6f3e99208021" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 205b9aa2a4c58fd7b2dd6dd0ff805bae68b0e103393aa11418409a2201e07cd7
[INFO] running `Command { std: "docker" "start" "-a" "205b9aa2a4c58fd7b2dd6dd0ff805bae68b0e103393aa11418409a2201e07cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "205b9aa2a4c58fd7b2dd6dd0ff805bae68b0e103393aa11418409a2201e07cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "205b9aa2a4c58fd7b2dd6dd0ff805bae68b0e103393aa11418409a2201e07cd7", kill_on_drop: false }`
[INFO] [stdout] 205b9aa2a4c58fd7b2dd6dd0ff805bae68b0e103393aa11418409a2201e07cd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4e55a504843955c97eb06907c71f6f3e99208021" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 159d2299763082a1319db3d04b19714c506c1967c1cb4f24a874ae80fbd52e81
[INFO] running `Command { std: "docker" "start" "-a" "159d2299763082a1319db3d04b19714c506c1967c1cb4f24a874ae80fbd52e81", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `if_else_condition` and `return_conditionally`
[INFO] [stdout]  --> src/main.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::control_flows::{elements_in_array, if_else_condition, iterating_collection, labeling_loops, looping, return_conditionally, whi...
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^                                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `if_else_condition` and `return_conditionally`
[INFO] [stdout]  --> src/main.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::control_flows::{elements_in_array, if_else_condition, iterating_collection, labeling_loops, looping, return_conditionally, whi...
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^                                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/basics/data_types.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut inferred_type = 11;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/basics/data_types.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut inferred_type = 11;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]  --> src/basics/numbers.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 |        let mut y: i32 = 5;
[INFO] [stdout]   |                         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `y` is never read
[INFO] [stdout]  --> src/basics/numbers.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 |        let mut y: i32 = 5;
[INFO] [stdout]   |                         ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `data_types_crate` is never used
[INFO] [stdout]  --> src/basics/data_types.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn data_types_crate() {
[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 `data_types_crate` is never used
[INFO] [stdout]  --> src/basics/data_types.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn data_types_crate() {
[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 `another_function_usage` is never used
[INFO] [stdout]  --> src/basics/data_types.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub(crate) fn another_function_usage() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `basic_numbers` is never used
[INFO] [stdout]  --> src/basics/numbers.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn basic_numbers() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_function_usage` is never used
[INFO] [stdout]  --> src/basics/data_types.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub(crate) fn another_function_usage() {
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `basic_numbers` is never used
[INFO] [stdout]  --> src/basics/numbers.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn basic_numbers() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assert_numbers` is never used
[INFO] [stdout]   --> src/basics/numbers.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |    pub(crate) fn assert_numbers() {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assert_numbers` is never used
[INFO] [stdout]   --> src/basics/numbers.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |    pub(crate) fn assert_numbers() {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_of` is never used
[INFO] [stdout]   --> src/basics/numbers.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn type_of<T>(_: &T) -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_of` is never used
[INFO] [stdout]   --> src/basics/numbers.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn type_of<T>(_: &T) -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_else_condition` is never used
[INFO] [stdout]  --> src/control_flows/mod.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn if_else_condition(number: i32) {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_else_condition` is never used
[INFO] [stdout]  --> src/control_flows/mod.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn if_else_condition(number: i32) {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_conditionally` is never used
[INFO] [stdout]  --> src/control_flows/mod.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) fn return_conditionally() -> i32 {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_conditionally` is never used
[INFO] [stdout]  --> src/control_flows/mod.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) fn return_conditionally() -> i32 {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `MyTuple` should have a snake case name
[INFO] [stdout]   --> src/basics/data_types.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let MyTuple = (5u32, 1u8, "hello", true, 'c', -5.04f32);
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case: `my_tuple`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `MyTuple` should have a snake case name
[INFO] [stdout]   --> src/basics/data_types.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let MyTuple = (5u32, 1u8, "hello", true, 'c', -5.04f32);
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case: `my_tuple`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "159d2299763082a1319db3d04b19714c506c1967c1cb4f24a874ae80fbd52e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "159d2299763082a1319db3d04b19714c506c1967c1cb4f24a874ae80fbd52e81", kill_on_drop: false }`
[INFO] [stdout] 159d2299763082a1319db3d04b19714c506c1967c1cb4f24a874ae80fbd52e81