Dec 19 16:24:04.356 INFO checking gregorholzmann/rust-playground against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:24:04.356 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/gregorholzmann/rust-playground:/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 16:24:04.800 INFO [stdout] 147625325dcce623d2a8e7daec1b5e05834cdcaf289e2ef4fc08a96a0633d883
Dec 19 16:24:04.802 INFO running `"docker" "start" "-a" "147625325dcce623d2a8e7daec1b5e05834cdcaf289e2ef4fc08a96a0633d883"`
Dec 19 16:24:06.804 INFO [stderr]     Checking rust-playground v0.1.0 (/opt/crater/workdir)
Dec 19 16:24:07.334 INFO [stderr] warning: unused variable: `x`
Dec 19 16:24:07.334 INFO [stderr]   --> src/main.rs:86:9
Dec 19 16:24:07.334 INFO [stderr]    |
Dec 19 16:24:07.334 INFO [stderr] 86 |     for x in 0..number_of_cards {
Dec 19 16:24:07.334 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 16:24:07.334 INFO [stderr]    |
Dec 19 16:24:07.334 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:24:07.334 INFO [stderr] 
Dec 19 16:24:07.334 INFO [stderr] warning: value assigned to `num_value` is never read
Dec 19 16:24:07.334 INFO [stderr]   --> src/main.rs:25:21
Dec 19 16:24:07.334 INFO [stderr]    |
Dec 19 16:24:07.334 INFO [stderr] 25 |             let mut num_value: u8 = 0;
Dec 19 16:24:07.334 INFO [stderr]    |                     ^^^^^^^^^
Dec 19 16:24:07.334 INFO [stderr]    |
Dec 19 16:24:07.334 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 16:24:07.334 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 16:24:07.334 INFO [stderr] 
Dec 19 16:24:07.355 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:24:07.355 INFO [stderr]    --> src/main.rs:101:51
Dec 19 16:24:07.355 INFO [stderr]     |
Dec 19 16:24:07.355 INFO [stderr] 101 | fn end_game(player_hand: Hand, dealer_hand: Hand, mut deck: &mut Vec<Card>) {
Dec 19 16:24:07.355 INFO [stderr]     |                                                   ----^^^^
Dec 19 16:24:07.355 INFO [stderr]     |                                                   |
Dec 19 16:24:07.355 INFO [stderr]     |                                                   help: remove this `mut`
Dec 19 16:24:07.355 INFO [stderr]     |
Dec 19 16:24:07.355 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 16:24:07.355 INFO [stderr] 
Dec 19 16:24:07.360 INFO [stderr] warning: unused variable: `x`
Dec 19 16:24:07.360 INFO [stderr]   --> src/main.rs:86:9
Dec 19 16:24:07.360 INFO [stderr]    |
Dec 19 16:24:07.360 INFO [stderr] 86 |     for x in 0..number_of_cards {
Dec 19 16:24:07.360 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 19 16:24:07.360 INFO [stderr]    |
Dec 19 16:24:07.360 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 16:24:07.360 INFO [stderr] 
Dec 19 16:24:07.360 INFO [stderr] warning: value assigned to `num_value` is never read
Dec 19 16:24:07.360 INFO [stderr]   --> src/main.rs:25:21
Dec 19 16:24:07.360 INFO [stderr]    |
Dec 19 16:24:07.360 INFO [stderr] 25 |             let mut num_value: u8 = 0;
Dec 19 16:24:07.360 INFO [stderr]    |                     ^^^^^^^^^
Dec 19 16:24:07.360 INFO [stderr]    |
Dec 19 16:24:07.360 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 16:24:07.360 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 16:24:07.360 INFO [stderr] 
Dec 19 16:24:07.380 INFO [stderr] warning: variable does not need to be mutable
Dec 19 16:24:07.380 INFO [stderr]    --> src/main.rs:101:51
Dec 19 16:24:07.380 INFO [stderr]     |
Dec 19 16:24:07.380 INFO [stderr] 101 | fn end_game(player_hand: Hand, dealer_hand: Hand, mut deck: &mut Vec<Card>) {
Dec 19 16:24:07.380 INFO [stderr]     |                                                   ----^^^^
Dec 19 16:24:07.380 INFO [stderr]     |                                                   |
Dec 19 16:24:07.380 INFO [stderr]     |                                                   help: remove this `mut`
Dec 19 16:24:07.380 INFO [stderr]     |
Dec 19 16:24:07.380 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 16:24:07.380 INFO [stderr] 
Dec 19 16:24:07.424 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
Dec 19 16:24:08.050 INFO running `"docker" "inspect" "147625325dcce623d2a8e7daec1b5e05834cdcaf289e2ef4fc08a96a0633d883"`
Dec 19 16:24:08.303 INFO running `"docker" "rm" "-f" "147625325dcce623d2a8e7daec1b5e05834cdcaf289e2ef4fc08a96a0633d883"`
Dec 19 16:24:08.631 INFO [stdout] 147625325dcce623d2a8e7daec1b5e05834cdcaf289e2ef4fc08a96a0633d883