[INFO] cloning repository https://github.com/rohit7648/Practice-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rohit7648/Practice-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohit7648%2FPractice-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohit7648%2FPractice-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85f180a0841ff5f4411ecd4d4f42d0e66ce67c0a
[INFO] checking rohit7648/Practice-Rust against try#0e1f5e292c80a395d02835ac656d141e992caf89 for pr-145605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frohit7648%2FPractice-Rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rohit7648/Practice-Rust
[INFO] finished tweaking git repo https://github.com/rohit7648/Practice-Rust
[INFO] tweaked toml for git repo https://github.com/rohit7648/Practice-Rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rohit7648/Practice-Rust on toolchain 0e1f5e292c80a395d02835ac656d141e992caf89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rohit7648/Practice-Rust 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" "+0e1f5e292c80a395d02835ac656d141e992caf89" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b7e6566aa6c7016ef644217404a94458e6944410ac5d685010ddc8908d5d04f
[INFO] running `Command { std: "docker" "start" "-a" "2b7e6566aa6c7016ef644217404a94458e6944410ac5d685010ddc8908d5d04f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b7e6566aa6c7016ef644217404a94458e6944410ac5d685010ddc8908d5d04f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b7e6566aa6c7016ef644217404a94458e6944410ac5d685010ddc8908d5d04f", kill_on_drop: false }`
[INFO] [stdout] 2b7e6566aa6c7016ef644217404a94458e6944410ac5d685010ddc8908d5d04f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 397b9b51168efa62c6eb8003ee79e643911f45e29dba0c8916502fe51190851c
[INFO] running `Command { std: "docker" "start" "-a" "397b9b51168efa62c6eb8003ee79e643911f45e29dba0c8916502fe51190851c", kill_on_drop: false }`
[INFO] [stderr]     Checking helloworl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]  --> src/practice/var.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b = 10; // It's mutable
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]  --> src/practice/var.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b = 10; // It's mutable
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tup_dec` is assigned to, but never used
[INFO] [stdout]   --> src/practice/data_types.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let tup_dec: (i32,i32,i32);
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_tup_dec` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tup_dec` is never read
[INFO] [stdout]   --> src/practice/data_types.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     tup_dec = (1,2,3);
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `tup_dec` is assigned to, but never used
[INFO] [stdout]   --> src/practice/data_types.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let tup_dec: (i32,i32,i32);
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_tup_dec` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tup_dec` is never read
[INFO] [stdout]   --> src/practice/data_types.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     tup_dec = (1,2,3);
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/practice/ownership.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut y = x.clone();
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/practice/ownership.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut y = x.clone();
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `declare_variable` is never used
[INFO] [stdout]  --> src/practice/var.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn declare_variable() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `without_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn without_param() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `single_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn single_param(a: i32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn two_param(a:i32, b:char) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/practice/function.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn sum(p0: i32, p1: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_internal` is never used
[INFO] [stdout]   --> src/practice/function.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn sum_internal(p0: i32, p1: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `all_data_types` is never used
[INFO] [stdout]  --> src/practice/data_types.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn all_data_types() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_else` is never used
[INFO] [stdout]  --> src/practice/if_else.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn if_else() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership_10` is never used
[INFO] [stdout]   --> src/practice/ownership.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn ownership_10() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `give_ownership_1` is never used
[INFO] [stdout]   --> src/practice/ownership.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn give_ownership_1() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `give_ownership_2` is never used
[INFO] [stdout]    --> src/practice/ownership.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn give_ownership_2() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `declare_variable` is never used
[INFO] [stdout]  --> src/practice/var.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn declare_variable() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `without_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn without_param() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `single_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn single_param(a: i32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_param` is never used
[INFO] [stdout]  --> src/practice/function.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn two_param(a:i32, b:char) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/practice/function.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn sum(p0: i32, p1: i32) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_internal` is never used
[INFO] [stdout]   --> src/practice/function.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn sum_internal(p0: i32, p1: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `all_data_types` is never used
[INFO] [stdout]  --> src/practice/data_types.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn all_data_types() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_else` is never used
[INFO] [stdout]  --> src/practice/if_else.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn if_else() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ownership_10` is never used
[INFO] [stdout]   --> src/practice/ownership.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn ownership_10() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `give_ownership_1` is never used
[INFO] [stdout]   --> src/practice/ownership.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn give_ownership_1() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `give_ownership_2` is never used
[INFO] [stdout]    --> src/practice/ownership.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn give_ownership_2() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "397b9b51168efa62c6eb8003ee79e643911f45e29dba0c8916502fe51190851c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "397b9b51168efa62c6eb8003ee79e643911f45e29dba0c8916502fe51190851c", kill_on_drop: false }`
[INFO] [stdout] 397b9b51168efa62c6eb8003ee79e643911f45e29dba0c8916502fe51190851c