Dec 11 17:38:10.377 INFO checking halcyon/rust_tut against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 17:38:10.377 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 17:38:10.832 INFO [stdout] 868fe4bfd69d159487e0eef1de60ec7a7181737805f9f12c74cc1226b74db763
Dec 11 17:38:10.840 INFO running `"docker" "start" "-a" "868fe4bfd69d159487e0eef1de60ec7a7181737805f9f12c74cc1226b74db763"`
Dec 11 17:38:12.143 INFO [stderr] usermod: no changes
Dec 11 17:38:12.187 INFO [stderr]     Checking rust_tut v0.1.0 (/source)
Dec 11 17:38:12.624 INFO [stderr] warning: unused imports: `u16`, `u32`, `u64`, `u8`
Dec 11 17:38:12.624 INFO [stderr]  --> src/main.rs:1:30
Dec 11 17:38:12.624 INFO [stderr]   |
Dec 11 17:38:12.624 INFO [stderr] 1 | use std::{i8, i16, i32, i64, u8, u16, u32, u64, isize, usize, f32, f64};
Dec 11 17:38:12.624 INFO [stderr]   |                              ^^  ^^^  ^^^  ^^^
Dec 11 17:38:12.624 INFO [stderr]   |
Dec 11 17:38:12.624 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 17:38:12.624 INFO [stderr] 
Dec 11 17:38:12.625 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.625 INFO [stderr]   --> src/main.rs:62:8
Dec 11 17:38:12.625 INFO [stderr]    |
Dec 11 17:38:12.625 INFO [stderr] 62 |     if (age_old == 5) {
Dec 11 17:38:12.625 INFO [stderr]    |        ^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.625 INFO [stderr]    |
Dec 11 17:38:12.625 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 17:38:12.625 INFO [stderr] 
Dec 11 17:38:12.625 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.625 INFO [stderr]   --> src/main.rs:78:23
Dec 11 17:38:12.625 INFO [stderr]    |
Dec 11 17:38:12.625 INFO [stderr] 78 |     let can_vote = if (age_old >= 18) { true } else { false };
Dec 11 17:38:12.625 INFO [stderr]    |                       ^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.625 INFO [stderr] 
Dec 11 17:38:12.625 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.625 INFO [stderr]   --> src/main.rs:85:12
Dec 11 17:38:12.625 INFO [stderr]    |
Dec 11 17:38:12.625 INFO [stderr] 85 |         if ((x % 2) == 0) {
Dec 11 17:38:12.625 INFO [stderr]    |            ^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.625 INFO [stderr] 
Dec 11 17:38:12.625 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.625 INFO [stderr]   --> src/main.rs:90:12
Dec 11 17:38:12.625 INFO [stderr]    |
Dec 11 17:38:12.625 INFO [stderr] 90 |         if (x > 10) {
Dec 11 17:38:12.625 INFO [stderr]    |            ^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.625 INFO [stderr] 
Dec 11 17:38:12.783 INFO [stderr] warning: unused variable: `num`
Dec 11 17:38:12.783 INFO [stderr]  --> src/main.rs:8:9
Dec 11 17:38:12.783 INFO [stderr]   |
Dec 11 17:38:12.783 INFO [stderr] 8 |     let num = 10;
Dec 11 17:38:12.783 INFO [stderr]   |         ^^^ help: consider using `_num` instead
Dec 11 17:38:12.783 INFO [stderr]   |
Dec 11 17:38:12.783 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 11 17:38:12.783 INFO [stderr] 
Dec 11 17:38:12.783 INFO [stderr] warning: unused variable: `f_name`
Dec 11 17:38:12.783 INFO [stderr]   --> src/main.rs:34:10
Dec 11 17:38:12.783 INFO [stderr]    |
Dec 11 17:38:12.784 INFO [stderr] 34 |     let (f_name, l_name) = ("Derek", "Banas");
Dec 11 17:38:12.784 INFO [stderr]    |          ^^^^^^ help: consider using `_f_name` instead
Dec 11 17:38:12.784 INFO [stderr] 
Dec 11 17:38:12.784 INFO [stderr] warning: unused variable: `l_name`
Dec 11 17:38:12.784 INFO [stderr]   --> src/main.rs:34:18
Dec 11 17:38:12.784 INFO [stderr]    |
Dec 11 17:38:12.784 INFO [stderr] 34 |     let (f_name, l_name) = ("Derek", "Banas");
Dec 11 17:38:12.784 INFO [stderr]    |                  ^^^^^^ help: consider using `_l_name` instead
Dec 11 17:38:12.784 INFO [stderr] 
Dec 11 17:38:12.784 INFO [stderr] warning: unused variable: `count`
Dec 11 17:38:12.784 INFO [stderr]    --> src/main.rs:116:9
Dec 11 17:38:12.784 INFO [stderr]     |
Dec 11 17:38:12.784 INFO [stderr] 116 |     let count = rand_string.chars().count();
Dec 11 17:38:12.784 INFO [stderr]     |         ^^^^^ help: consider using `_count` instead
Dec 11 17:38:12.784 INFO [stderr] 
Dec 11 17:38:12.816 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:38:12.816 INFO [stderr]   --> src/main.rs:10:9
Dec 11 17:38:12.816 INFO [stderr]    |
Dec 11 17:38:12.816 INFO [stderr] 10 |     let mut age: i32 = 40;
Dec 11 17:38:12.816 INFO [stderr]    |         ----^^^
Dec 11 17:38:12.816 INFO [stderr]    |         |
Dec 11 17:38:12.816 INFO [stderr]    |         help: remove this `mut`
Dec 11 17:38:12.816 INFO [stderr]    |
Dec 11 17:38:12.816 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 17:38:12.816 INFO [stderr] 
Dec 11 17:38:12.816 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:38:12.816 INFO [stderr]   --> src/main.rs:52:9
Dec 11 17:38:12.816 INFO [stderr]    |
Dec 11 17:38:12.816 INFO [stderr] 52 |     let mut neg_4 = -4i32;
Dec 11 17:38:12.816 INFO [stderr]    |         ----^^^^^
Dec 11 17:38:12.817 INFO [stderr]    |         |
Dec 11 17:38:12.817 INFO [stderr]    |         help: remove this `mut`
Dec 11 17:38:12.817 INFO [stderr] 
Dec 11 17:38:12.903 INFO [stderr] warning: unused imports: `u16`, `u32`, `u64`, `u8`
Dec 11 17:38:12.903 INFO [stderr]  --> src/main.rs:1:30
Dec 11 17:38:12.903 INFO [stderr]   |
Dec 11 17:38:12.903 INFO [stderr] 1 | use std::{i8, i16, i32, i64, u8, u16, u32, u64, isize, usize, f32, f64};
Dec 11 17:38:12.903 INFO [stderr]   |                              ^^  ^^^  ^^^  ^^^
Dec 11 17:38:12.903 INFO [stderr]   |
Dec 11 17:38:12.903 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 11 17:38:12.903 INFO [stderr] 
Dec 11 17:38:12.903 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.903 INFO [stderr]   --> src/main.rs:62:8
Dec 11 17:38:12.903 INFO [stderr]    |
Dec 11 17:38:12.903 INFO [stderr] 62 |     if (age_old == 5) {
Dec 11 17:38:12.903 INFO [stderr]    |        ^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.903 INFO [stderr]    |
Dec 11 17:38:12.903 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 17:38:12.903 INFO [stderr] 
Dec 11 17:38:12.903 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.903 INFO [stderr]   --> src/main.rs:78:23
Dec 11 17:38:12.903 INFO [stderr]    |
Dec 11 17:38:12.903 INFO [stderr] 78 |     let can_vote = if (age_old >= 18) { true } else { false };
Dec 11 17:38:12.903 INFO [stderr]    |                       ^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.903 INFO [stderr] 
Dec 11 17:38:12.903 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.903 INFO [stderr]   --> src/main.rs:85:12
Dec 11 17:38:12.903 INFO [stderr]    |
Dec 11 17:38:12.903 INFO [stderr] 85 |         if ((x % 2) == 0) {
Dec 11 17:38:12.903 INFO [stderr]    |            ^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.903 INFO [stderr] 
Dec 11 17:38:12.903 INFO [stderr] warning: unnecessary parentheses around `if` condition
Dec 11 17:38:12.903 INFO [stderr]   --> src/main.rs:90:12
Dec 11 17:38:12.903 INFO [stderr]    |
Dec 11 17:38:12.903 INFO [stderr] 90 |         if (x > 10) {
Dec 11 17:38:12.903 INFO [stderr]    |            ^^^^^^^^ help: remove these parentheses
Dec 11 17:38:12.903 INFO [stderr] 
Dec 11 17:38:13.052 INFO [stderr] warning: unused variable: `num`
Dec 11 17:38:13.052 INFO [stderr]  --> src/main.rs:8:9
Dec 11 17:38:13.052 INFO [stderr]   |
Dec 11 17:38:13.052 INFO [stderr] 8 |     let num = 10;
Dec 11 17:38:13.052 INFO [stderr]   |         ^^^ help: consider using `_num` instead
Dec 11 17:38:13.052 INFO [stderr]   |
Dec 11 17:38:13.052 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 11 17:38:13.052 INFO [stderr] 
Dec 11 17:38:13.052 INFO [stderr] warning: unused variable: `f_name`
Dec 11 17:38:13.052 INFO [stderr]   --> src/main.rs:34:10
Dec 11 17:38:13.052 INFO [stderr]    |
Dec 11 17:38:13.052 INFO [stderr] 34 |     let (f_name, l_name) = ("Derek", "Banas");
Dec 11 17:38:13.052 INFO [stderr]    |          ^^^^^^ help: consider using `_f_name` instead
Dec 11 17:38:13.052 INFO [stderr] 
Dec 11 17:38:13.052 INFO [stderr] warning: unused variable: `l_name`
Dec 11 17:38:13.052 INFO [stderr]   --> src/main.rs:34:18
Dec 11 17:38:13.052 INFO [stderr]    |
Dec 11 17:38:13.052 INFO [stderr] 34 |     let (f_name, l_name) = ("Derek", "Banas");
Dec 11 17:38:13.052 INFO [stderr]    |                  ^^^^^^ help: consider using `_l_name` instead
Dec 11 17:38:13.052 INFO [stderr] 
Dec 11 17:38:13.052 INFO [stderr] warning: unused variable: `count`
Dec 11 17:38:13.052 INFO [stderr]    --> src/main.rs:116:9
Dec 11 17:38:13.052 INFO [stderr]     |
Dec 11 17:38:13.052 INFO [stderr] 116 |     let count = rand_string.chars().count();
Dec 11 17:38:13.052 INFO [stderr]     |         ^^^^^ help: consider using `_count` instead
Dec 11 17:38:13.052 INFO [stderr] 
Dec 11 17:38:13.082 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:38:13.082 INFO [stderr]   --> src/main.rs:10:9
Dec 11 17:38:13.082 INFO [stderr]    |
Dec 11 17:38:13.082 INFO [stderr] 10 |     let mut age: i32 = 40;
Dec 11 17:38:13.082 INFO [stderr]    |         ----^^^
Dec 11 17:38:13.082 INFO [stderr]    |         |
Dec 11 17:38:13.082 INFO [stderr]    |         help: remove this `mut`
Dec 11 17:38:13.082 INFO [stderr]    |
Dec 11 17:38:13.082 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 17:38:13.082 INFO [stderr] 
Dec 11 17:38:13.082 INFO [stderr] warning: variable does not need to be mutable
Dec 11 17:38:13.082 INFO [stderr]   --> src/main.rs:52:9
Dec 11 17:38:13.082 INFO [stderr]    |
Dec 11 17:38:13.082 INFO [stderr] 52 |     let mut neg_4 = -4i32;
Dec 11 17:38:13.082 INFO [stderr]    |         ----^^^^^
Dec 11 17:38:13.082 INFO [stderr]    |         |
Dec 11 17:38:13.082 INFO [stderr]    |         help: remove this `mut`
Dec 11 17:38:13.082 INFO [stderr] 
Dec 11 17:38:13.133 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
Dec 11 17:38:13.133 INFO [stderr] su: No module specific data is present
Dec 11 17:38:13.692 INFO running `"docker" "inspect" "868fe4bfd69d159487e0eef1de60ec7a7181737805f9f12c74cc1226b74db763"`
Dec 11 17:38:13.978 INFO running `"docker" "rm" "-f" "868fe4bfd69d159487e0eef1de60ec7a7181737805f9f12c74cc1226b74db763"`
Dec 11 17:38:14.324 INFO [stdout] 868fe4bfd69d159487e0eef1de60ec7a7181737805f9f12c74cc1226b74db763