[INFO] updating cached repository https://github.com/gbersac/n_puzzle_42
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cb0a3b3888123ba4f830ba93ce1b9f792a0e26dd
[INFO] checking gbersac/n_puzzle_42 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgbersac%2Fn_puzzle_42" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gbersac/n_puzzle_42 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gbersac/n_puzzle_42
[INFO] finished tweaking git repo https://github.com/gbersac/n_puzzle_42
[INFO] tweaked toml for git repo https://github.com/gbersac/n_puzzle_42 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/gbersac/n_puzzle_42 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-2/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d2411bc6491c54c20aa1c0246283128c6e6f07b1c331157280d53acafe25a0b
[INFO] running `"docker" "start" "-a" "3d2411bc6491c54c20aa1c0246283128c6e6f07b1c331157280d53acafe25a0b"`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking term-painter v0.2.4
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking npuzzle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `Action`, `Board`
[INFO] [stderr]  --> src/algo/test.rs:4:25
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use npuzzle::{NPuzzle, Board, Action};
[INFO] [stderr]   |                            ^^^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `AStarNode`
[INFO] [stderr]  --> src/algo/test.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |     use algo::{AStarNode};
[INFO] [stderr]   |                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/npuzzle/npuzzle.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/npuzzle/npuzzle.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         for _ in (0..(size * size)) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr] 100 |         for i in (0..used_numbers.len()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:122:12
[INFO] [stderr]     |
[INFO] [stderr] 122 |         for _ in (0..board.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:204:12
[INFO] [stderr]     |
[INFO] [stderr] 204 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:234:12
[INFO] [stderr]     |
[INFO] [stderr] 234 |         for i in (0..board.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/npuzzle/parser.rs:59:6
[INFO] [stderr]    |
[INFO] [stderr] 59 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `NPuzzle`
[INFO] [stderr]   --> src/npuzzle/parser.rs:60:16
[INFO] [stderr]    |
[INFO] [stderr] 60 |     use npuzzle::{NPuzzle, Board, Tile};
[INFO] [stderr]    |                   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/npuzzle/errors.rs:44:29
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/npuzzle/errors.rs:80:29
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]  --> src/npuzzle/test.rs:4:6
[INFO] [stderr]   |
[INFO] [stderr] 4 |     use super::*;
[INFO] [stderr]   |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:116:12
[INFO] [stderr]     |
[INFO] [stderr] 116 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:146:12
[INFO] [stderr]     |
[INFO] [stderr] 146 |         for y in (0..self.size) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |             for x in (0..self.size) {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:161:15
[INFO] [stderr]     |
[INFO] [stderr] 161 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/npuzzle/npuzzle.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/npuzzle/npuzzle.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         for _ in (0..(size * size)) {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr] 100 |         for i in (0..used_numbers.len()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:122:12
[INFO] [stderr]     |
[INFO] [stderr] 122 |         for _ in (0..board.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:204:12
[INFO] [stderr]     |
[INFO] [stderr] 204 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/npuzzle.rs:234:12
[INFO] [stderr]     |
[INFO] [stderr] 234 |         for i in (0..board.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/npuzzle/errors.rs:44:29
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/npuzzle/errors.rs:80:29
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:116:12
[INFO] [stderr]     |
[INFO] [stderr] 116 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:146:12
[INFO] [stderr]     |
[INFO] [stderr] 146 |         for y in (0..self.size) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:147:13
[INFO] [stderr]     |
[INFO] [stderr] 147 |             for x in (0..self.size) {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/npuzzle/board.rs:161:15
[INFO] [stderr]     |
[INFO] [stderr] 161 |         for i in (0..self.nb_tile()) {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `np`
[INFO] [stderr]   --> src/npuzzle/parser.rs:87:7
[INFO] [stderr]    |
[INFO] [stderr] 87 |         let np = Board::parse_with_size(&mut str1.to_string()).unwrap();
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_np`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `np`
[INFO] [stderr]   --> src/npuzzle/parser.rs:98:7
[INFO] [stderr]    |
[INFO] [stderr] 98 |         let np = Board::parse_with_size(&mut str1.to_string()).unwrap();
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_np`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `np`
[INFO] [stderr]    --> src/npuzzle/parser.rs:109:7
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let np = Board::parse_with_size(&mut str1.to_string()).unwrap();
[INFO] [stderr]     |             ^^ help: consider prefixing with an underscore: `_np`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `s2` is never read
[INFO] [stderr]   --> src/npuzzle/test.rs:57:11
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let mut s2 = "";
[INFO] [stderr]    |                 ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:16:7
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:21:7
[INFO] [stderr]    |
[INFO] [stderr] 21 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:26:7
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:31:7
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:46:7
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:51:7
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:56:7
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:72:7
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:77:7
[INFO] [stderr]    |
[INFO] [stderr] 77 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algo/test.rs:82:7
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let mut s = r#"3
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/npuzzle/parser.rs:64:7
[INFO] [stderr]    |
[INFO] [stderr] 64 |         let mut str1 = r#"2
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/npuzzle/parser.rs:82:7
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let mut str1 = r#"3
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/npuzzle/parser.rs:93:7
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let mut str1 = r#"3
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/npuzzle/parser.rs:104:7
[INFO] [stderr]     |
[INFO] [stderr] 104 |         let mut str1 = r#"3
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.56s
[INFO] running `"docker" "inspect" "3d2411bc6491c54c20aa1c0246283128c6e6f07b1c331157280d53acafe25a0b"`
[INFO] running `"docker" "rm" "-f" "3d2411bc6491c54c20aa1c0246283128c6e6f07b1c331157280d53acafe25a0b"`
[INFO] [stdout] 3d2411bc6491c54c20aa1c0246283128c6e6f07b1c331157280d53acafe25a0b