Dec 19 13:16:42.197 INFO checking madeinfree/hello-rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 13:16:42.197 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/madeinfree/hello-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 13:16:42.660 INFO [stdout] 4817892f37a13c35005adb0d16c0a44e63fdb0dc96a145e993811d04aef2a14c
Dec 19 13:16:42.660 INFO running `"docker" "start" "-a" "4817892f37a13c35005adb0d16c0a44e63fdb0dc96a145e993811d04aef2a14c"`
Dec 19 13:16:44.044 INFO [stderr]     Checking rand v0.5.2
Dec 19 13:16:46.137 INFO [stderr]     Checking hello v0.1.0 (/opt/crater/workdir)
Dec 19 13:16:46.290 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 13:16:46.290 INFO [stderr]    --> src/main.rs:567:17
Dec 19 13:16:46.290 INFO [stderr]     |
Dec 19 13:16:46.290 INFO [stderr] 567 |   for number in (1..5) {
Dec 19 13:16:46.290 INFO [stderr]     |                 ^^^^^^ help: remove these parentheses
Dec 19 13:16:46.290 INFO [stderr]     |
Dec 19 13:16:46.290 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 13:16:46.290 INFO [stderr] 
Dec 19 13:16:46.340 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 19 13:16:46.340 INFO [stderr]    --> src/main.rs:567:17
Dec 19 13:16:46.340 INFO [stderr]     |
Dec 19 13:16:46.340 INFO [stderr] 567 |   for number in (1..5) {
Dec 19 13:16:46.340 INFO [stderr]     |                 ^^^^^^ help: remove these parentheses
Dec 19 13:16:46.340 INFO [stderr]     |
Dec 19 13:16:46.340 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 19 13:16:46.340 INFO [stderr] 
Dec 19 13:16:46.380 INFO [stderr] warning: unreachable statement
Dec 19 13:16:46.380 INFO [stderr]    --> src/main.rs:254:3
Dec 19 13:16:46.380 INFO [stderr]     |
Dec 19 13:16:46.380 INFO [stderr] 254 |   println!("{}", "Run here?"); // Not run
Dec 19 13:16:46.380 INFO [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.380 INFO [stderr]     |
Dec 19 13:16:46.380 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 19 13:16:46.380 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 13:16:46.380 INFO [stderr] 
Dec 19 13:16:46.428 INFO [stderr] warning: unreachable statement
Dec 19 13:16:46.428 INFO [stderr]    --> src/main.rs:254:3
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr] 254 |   println!("{}", "Run here?"); // Not run
Dec 19 13:16:46.428 INFO [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 19 13:16:46.428 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 13:16:46.428 INFO [stderr] 
Dec 19 13:16:46.428 INFO [stderr] warning: unused variable: `f`
Dec 19 13:16:46.428 INFO [stderr]    --> src/main.rs:188:7
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr] 188 |   let f = match f {
Dec 19 13:16:46.428 INFO [stderr]     |       ^ help: consider using `_f` instead
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 13:16:46.428 INFO [stderr] 
Dec 19 13:16:46.428 INFO [stderr] warning: unused variable: `row`
Dec 19 13:16:46.428 INFO [stderr]    --> src/main.rs:301:7
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr] 301 |   let row = vec![
Dec 19 13:16:46.428 INFO [stderr]     |       ^^^ help: consider using `_row` instead
Dec 19 13:16:46.428 INFO [stderr] 
Dec 19 13:16:46.428 INFO [stderr] warning: unused variable: `six`
Dec 19 13:16:46.428 INFO [stderr]    --> src/main.rs:358:7
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr] 358 |   let six = plus_one(five);
Dec 19 13:16:46.428 INFO [stderr]     |       ^^^ help: consider using `_six` instead
Dec 19 13:16:46.428 INFO [stderr] 
Dec 19 13:16:46.428 INFO [stderr] warning: unused variable: `none`
Dec 19 13:16:46.428 INFO [stderr]    --> src/main.rs:359:7
Dec 19 13:16:46.428 INFO [stderr]     |
Dec 19 13:16:46.428 INFO [stderr] 359 |   let none = plus_one(None);
Dec 19 13:16:46.428 INFO [stderr]     |       ^^^^ help: consider using `_none` instead
Dec 19 13:16:46.428 INFO [stderr] 
Dec 19 13:16:46.429 INFO [stderr] warning: unused variable: `home`
Dec 19 13:16:46.429 INFO [stderr]    --> src/main.rs:380:7
Dec 19 13:16:46.429 INFO [stderr]     |
Dec 19 13:16:46.429 INFO [stderr] 380 |   let home = IpAddr {
Dec 19 13:16:46.429 INFO [stderr]     |       ^^^^ help: consider using `_home` instead
Dec 19 13:16:46.429 INFO [stderr] 
Dec 19 13:16:46.429 INFO [stderr] warning: unused variable: `r1`
Dec 19 13:16:46.429 INFO [stderr]    --> src/main.rs:498:9
Dec 19 13:16:46.429 INFO [stderr]     |
Dec 19 13:16:46.429 INFO [stderr] 498 |     let r1 = &mut s;
Dec 19 13:16:46.429 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Dec 19 13:16:46.429 INFO [stderr] 
Dec 19 13:16:46.429 INFO [stderr] warning: unused variable: `r2`
Dec 19 13:16:46.429 INFO [stderr]    --> src/main.rs:500:7
Dec 19 13:16:46.429 INFO [stderr]     |
Dec 19 13:16:46.429 INFO [stderr] 500 |   let r2 = &mut s;
Dec 19 13:16:46.429 INFO [stderr]     |       ^^ help: consider using `_r2` instead
Dec 19 13:16:46.429 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `longest`
Dec 19 13:16:46.484 INFO [stderr]   --> src/main.rs:53:3
Dec 19 13:16:46.484 INFO [stderr]    |
Dec 19 13:16:46.484 INFO [stderr] 53 |   fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
Dec 19 13:16:46.484 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr]    |
Dec 19 13:16:46.484 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `sample_impl_trait_type`
Dec 19 13:16:46.484 INFO [stderr]   --> src/main.rs:94:1
Dec 19 13:16:46.484 INFO [stderr]    |
Dec 19 13:16:46.484 INFO [stderr] 94 | fn sample_impl_trait_type() {
Dec 19 13:16:46.484 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `sample_generic_types`
Dec 19 13:16:46.484 INFO [stderr]    --> src/main.rs:151:1
Dec 19 13:16:46.484 INFO [stderr]     |
Dec 19 13:16:46.484 INFO [stderr] 151 | fn sample_generic_types() {
Dec 19 13:16:46.484 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `sample_error_result`
Dec 19 13:16:46.484 INFO [stderr]    --> src/main.rs:177:1
Dec 19 13:16:46.484 INFO [stderr]     |
Dec 19 13:16:46.484 INFO [stderr] 177 | fn sample_error_result() {
Dec 19 13:16:46.484 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `sample_error_panic`
Dec 19 13:16:46.484 INFO [stderr]    --> src/main.rs:250:1
Dec 19 13:16:46.484 INFO [stderr]     |
Dec 19 13:16:46.484 INFO [stderr] 250 | fn sample_error_panic() {
Dec 19 13:16:46.484 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.484 INFO [stderr] warning: function is never used: `sample_hash_map`
Dec 19 13:16:46.484 INFO [stderr]    --> src/main.rs:257:1
Dec 19 13:16:46.484 INFO [stderr]     |
Dec 19 13:16:46.484 INFO [stderr] 257 | fn sample_hash_map() {
Dec 19 13:16:46.484 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.484 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_vector`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:285:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 285 | fn sample_vector() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_if_let`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:309:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 309 | fn sample_if_let() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_match`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:324:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 324 | fn sample_match() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_enum`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:370:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 370 | fn sample_enum() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_method_syntax`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:386:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 386 | fn sample_method_syntax() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_use_struct`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:407:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 407 | fn sample_use_struct() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_defining_struct`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:430:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 430 | fn sample_defining_struct() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_string_slice`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:453:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 453 | fn sample_string_slice() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_slice_type`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:478:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 478 | fn sample_slice_type() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_ownership_multi_ref`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:494:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 494 | fn sample_ownership_multi_ref() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_ownership_ref`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:507:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 507 | fn sample_ownership_ref() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_ownership`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:536:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 536 | fn sample_ownership() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_control_flow`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:562:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 562 | fn sample_control_flow() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_function_call`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:609:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 609 | fn sample_function_call() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.485 INFO [stderr] 
Dec 19 13:16:46.485 INFO [stderr] warning: function is never used: `sample_type`
Dec 19 13:16:46.485 INFO [stderr]    --> src/main.rs:635:1
Dec 19 13:16:46.485 INFO [stderr]     |
Dec 19 13:16:46.485 INFO [stderr] 635 | fn sample_type() {
Dec 19 13:16:46.485 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: function is never used: `sample_len`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:643:1
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 643 | fn sample_len() {
Dec 19 13:16:46.486 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: function is never used: `sample_rang`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:648:1
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 648 | fn sample_rang() {
Dec 19 13:16:46.486 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: trait method `summarizeD` should have a snake case name such as `summarize_d`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:102:5
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 102 |     fn summarizeD(&self) -> String;
Dec 19 13:16:46.486 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `f`
Dec 19 13:16:46.486 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:188:7
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 188 |   let f = match f {
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr]     |       ^ help: consider using `_f` instead
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `row`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:301:7
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 301 |   let row = vec![
Dec 19 13:16:46.486 INFO [stderr]     |       ^^^ help: consider using `_row` instead
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `six`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:358:7
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 358 |   let six = plus_one(five);
Dec 19 13:16:46.486 INFO [stderr]     |       ^^^ help: consider using `_six` instead
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `none`
Dec 19 13:16:46.486 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:223:5
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:359:7
Dec 19 13:16:46.486 INFO [stderr] 223 |     File::open("./src/hello.txt")?.read_to_string(&mut s2);
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.486 INFO [stderr] 359 |   let none = plus_one(None);
Dec 19 13:16:46.486 INFO [stderr]     |       ^^^^ help: consider using `_none` instead
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:16:46.486 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `home`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:380:7
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 380 |   let home = IpAddr {
Dec 19 13:16:46.486 INFO [stderr]     |       ^^^^ help: consider using `_home` instead
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `r1`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:498:9
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 498 |     let r1 = &mut s;
Dec 19 13:16:46.486 INFO [stderr]     |         ^^ help: consider using `_r1` instead
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.486 INFO [stderr] warning: unused variable: `r2`
Dec 19 13:16:46.486 INFO [stderr]    --> src/main.rs:500:7
Dec 19 13:16:46.486 INFO [stderr]     |
Dec 19 13:16:46.486 INFO [stderr] 500 |   let r2 = &mut s;
Dec 19 13:16:46.486 INFO [stderr]     |       ^^ help: consider using `_r2` instead
Dec 19 13:16:46.486 INFO [stderr] 
Dec 19 13:16:46.494 INFO [stderr] warning: variable `commonS` should have a snake case name such as `common_s`
Dec 19 13:16:46.494 INFO [stderr]    --> src/main.rs:455:7
Dec 19 13:16:46.494 INFO [stderr]     |
Dec 19 13:16:46.494 INFO [stderr] 455 |   let commonS = "Hello Common World";
Dec 19 13:16:46.494 INFO [stderr]     |       ^^^^^^^
Dec 19 13:16:46.494 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `longest`
Dec 19 13:16:46.544 INFO [stderr]   --> src/main.rs:53:3
Dec 19 13:16:46.544 INFO [stderr]    |
Dec 19 13:16:46.544 INFO [stderr] 53 |   fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
Dec 19 13:16:46.544 INFO [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr]    |
Dec 19 13:16:46.544 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_impl_trait_type`
Dec 19 13:16:46.544 INFO [stderr]   --> src/main.rs:94:1
Dec 19 13:16:46.544 INFO [stderr]    |
Dec 19 13:16:46.544 INFO [stderr] 94 | fn sample_impl_trait_type() {
Dec 19 13:16:46.544 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_generic_types`
Dec 19 13:16:46.544 INFO [stderr]    --> src/main.rs:151:1
Dec 19 13:16:46.544 INFO [stderr]     |
Dec 19 13:16:46.544 INFO [stderr] 151 | fn sample_generic_types() {
Dec 19 13:16:46.544 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_error_result`
Dec 19 13:16:46.544 INFO [stderr]    --> src/main.rs:177:1
Dec 19 13:16:46.544 INFO [stderr]     |
Dec 19 13:16:46.544 INFO [stderr] 177 | fn sample_error_result() {
Dec 19 13:16:46.544 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_error_panic`
Dec 19 13:16:46.544 INFO [stderr]    --> src/main.rs:250:1
Dec 19 13:16:46.544 INFO [stderr]     |
Dec 19 13:16:46.544 INFO [stderr] 250 | fn sample_error_panic() {
Dec 19 13:16:46.544 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_hash_map`
Dec 19 13:16:46.544 INFO [stderr]    --> src/main.rs:257:1
Dec 19 13:16:46.544 INFO [stderr]     |
Dec 19 13:16:46.544 INFO [stderr] 257 | fn sample_hash_map() {
Dec 19 13:16:46.544 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.544 INFO [stderr] 
Dec 19 13:16:46.544 INFO [stderr] warning: function is never used: `sample_vector`
Dec 19 13:16:46.544 INFO [stderr]    --> src/main.rs:285:1
Dec 19 13:16:46.544 INFO [stderr]     |
Dec 19 13:16:46.544 INFO [stderr] 285 | fn sample_vector() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_if_let`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:309:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 309 | fn sample_if_let() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_match`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:324:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 324 | fn sample_match() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_enum`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:370:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 370 | fn sample_enum() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_method_syntax`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:386:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 386 | fn sample_method_syntax() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_use_struct`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:407:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 407 | fn sample_use_struct() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_defining_struct`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:430:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 430 | fn sample_defining_struct() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_string_slice`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:453:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 453 | fn sample_string_slice() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_slice_type`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:478:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 478 | fn sample_slice_type() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_ownership_multi_ref`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:494:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 494 | fn sample_ownership_multi_ref() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_ownership_ref`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:507:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 507 | fn sample_ownership_ref() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_ownership`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:536:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 536 | fn sample_ownership() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_control_flow`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:562:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 562 | fn sample_control_flow() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_function_call`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:609:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 609 | fn sample_function_call() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_type`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:635:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 635 | fn sample_type() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_len`
Dec 19 13:16:46.545 INFO [stderr]    --> src/main.rs:643:1
Dec 19 13:16:46.545 INFO [stderr]     |
Dec 19 13:16:46.545 INFO [stderr] 643 | fn sample_len() {
Dec 19 13:16:46.545 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 19 13:16:46.545 INFO [stderr] 
Dec 19 13:16:46.545 INFO [stderr] warning: function is never used: `sample_rang`
Dec 19 13:16:46.546 INFO [stderr]    --> src/main.rs:648:1
Dec 19 13:16:46.546 INFO [stderr]     |
Dec 19 13:16:46.546 INFO [stderr] 648 | fn sample_rang() {
Dec 19 13:16:46.546 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 19 13:16:46.546 INFO [stderr] 
Dec 19 13:16:46.552 INFO [stderr] warning: trait method `summarizeD` should have a snake case name such as `summarize_d`
Dec 19 13:16:46.552 INFO [stderr]    --> src/main.rs:102:5
Dec 19 13:16:46.552 INFO [stderr]     |
Dec 19 13:16:46.552 INFO [stderr] 102 |     fn summarizeD(&self) -> String;
Dec 19 13:16:46.552 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.552 INFO [stderr]     |
Dec 19 13:16:46.552 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 19 13:16:46.552 INFO [stderr] 
Dec 19 13:16:46.552 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 13:16:46.552 INFO [stderr]    --> src/main.rs:223:5
Dec 19 13:16:46.552 INFO [stderr]     |
Dec 19 13:16:46.552 INFO [stderr] 223 |     File::open("./src/hello.txt")?.read_to_string(&mut s2);
Dec 19 13:16:46.552 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 13:16:46.552 INFO [stderr]     |
Dec 19 13:16:46.552 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 13:16:46.552 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 13:16:46.552 INFO [stderr] 
Dec 19 13:16:46.552 INFO [stderr] warning: variable `commonS` should have a snake case name such as `common_s`
Dec 19 13:16:46.552 INFO [stderr]    --> src/main.rs:455:7
Dec 19 13:16:46.552 INFO [stderr]     |
Dec 19 13:16:46.552 INFO [stderr] 455 |   let commonS = "Hello Common World";
Dec 19 13:16:46.552 INFO [stderr]     |       ^^^^^^^
Dec 19 13:16:46.552 INFO [stderr] 
Dec 19 13:16:46.580 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.58s
Dec 19 13:16:46.986 INFO running `"docker" "inspect" "4817892f37a13c35005adb0d16c0a44e63fdb0dc96a145e993811d04aef2a14c"`
Dec 19 13:16:47.128 INFO running `"docker" "rm" "-f" "4817892f37a13c35005adb0d16c0a44e63fdb0dc96a145e993811d04aef2a14c"`
Dec 19 13:16:47.330 INFO [stdout] 4817892f37a13c35005adb0d16c0a44e63fdb0dc96a145e993811d04aef2a14c