[INFO] updating cached repository CharlieChai/baby_code_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CharlieChai/baby_code_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CharlieChai/baby_code_rust" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/CharlieChai/baby_code_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/CharlieChai/baby_code_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CharlieChai/baby_code_rust" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/CharlieChai/baby_code_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/CharlieChai/baby_code_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8bdedc2a6465ab8fd01fea944a46ee0c7c911d40
[INFO] sha for GitHub repo CharlieChai/baby_code_rust: 8bdedc2a6465ab8fd01fea944a46ee0c7c911d40
[INFO] validating manifest of CharlieChai/baby_code_rust on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CharlieChai/baby_code_rust on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CharlieChai/baby_code_rust
[INFO] finished frobbing CharlieChai/baby_code_rust
[INFO] frobbed toml for CharlieChai/baby_code_rust written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/CharlieChai/baby_code_rust/Cargo.toml
[INFO] started frobbing CharlieChai/baby_code_rust
[INFO] finished frobbing CharlieChai/baby_code_rust
[INFO] frobbed toml for CharlieChai/baby_code_rust written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/CharlieChai/baby_code_rust/Cargo.toml
[INFO] crate CharlieChai/baby_code_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CharlieChai/baby_code_rust against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-6/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/CharlieChai/baby_code_rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9cfbd9cf9c3e792802a526367b27ce851d0f9788835e8043878c30c16a96b705
[INFO] running `"docker" "start" "-a" "9cfbd9cf9c3e792802a526367b27ce851d0f9788835e8043878c30c16a96b705"`
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::net::IpAddr`
[INFO] [stderr]  --> src/demo.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     use std::net::IpAddr;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `Ipv6Addr`, `SocketAddrV4`, `SocketAddrV6`
[INFO] [stderr]  --> src/demo.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
[INFO] [stderr]   |                    ^^^^^^^^  ^^^^^^^^              ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::net::IpAddr`
[INFO] [stderr]  --> src/demo.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     use std::net::IpAddr;
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `Ipv6Addr`, `SocketAddrV4`, `SocketAddrV6`
[INFO] [stderr]  --> src/demo.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
[INFO] [stderr]   |                    ^^^^^^^^  ^^^^^^^^              ^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/leetcode.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut res:i32 = 0;
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/demo.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut counter = Arc::new(Mutex::new(a));
[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/leetcode.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut res:i32 = 0;
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ServerAddr`
[INFO] [stderr]  --> src/demo.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     enum ServerAddr {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen_addr`
[INFO] [stderr]   --> src/demo.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         fn listen_addr(self) -> SocketAddr {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Context`
[INFO] [stderr]   --> src/demo.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     struct Context<'s>(&'s str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]   --> src/demo.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     struct Parser<'c, 's: 'c> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse`
[INFO] [stderr]   --> src/demo.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         fn parse(&self) -> Result<(), &'s str> {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_content`
[INFO] [stderr]   --> src/demo.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn parse_content(context: Context) -> Result<(), &str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fa`
[INFO] [stderr]   --> src/demo.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn fa(s: &mut String) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `case_sensitive`
[INFO] [stderr]  --> src/grep.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     case_sensitive: bool,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/stack.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn new() -> Stack<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/stack.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn pop(&mut self) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]   --> src/stack.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn push(&mut self, val: T) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/stack.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/stack.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn new(v: T) -> StackNode<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `BST`
[INFO] [stderr]   --> src/tree.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | type BST<K, V> = Node<K, V>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/leetcode.rs:25:21
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut res:i32 = 0;
[INFO] [stderr]    |                     ^^^ help: consider prefixing with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/demo.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut counter = Arc::new(Mutex::new(a));
[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/leetcode.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut res:i32 = 0;
[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/leetcode.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let mut str1 = "this is a   pen  ";
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ServerAddr`
[INFO] [stderr]  --> src/demo.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     enum ServerAddr {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen_addr`
[INFO] [stderr]   --> src/demo.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         fn listen_addr(self) -> SocketAddr {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Context`
[INFO] [stderr]   --> src/demo.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     struct Context<'s>(&'s str);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]   --> src/demo.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     struct Parser<'c, 's: 'c> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse`
[INFO] [stderr]   --> src/demo.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         fn parse(&self) -> Result<(), &'s str> {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_content`
[INFO] [stderr]   --> src/demo.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn parse_content(context: Context) -> Result<(), &str> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fa`
[INFO] [stderr]   --> src/demo.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn fa(s: &mut String) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `case_sensitive`
[INFO] [stderr]  --> src/grep.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     case_sensitive: bool,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "9cfbd9cf9c3e792802a526367b27ce851d0f9788835e8043878c30c16a96b705"`
[INFO] running `"docker" "rm" "-f" "9cfbd9cf9c3e792802a526367b27ce851d0f9788835e8043878c30c16a96b705"`
[INFO] [stdout] 9cfbd9cf9c3e792802a526367b27ce851d0f9788835e8043878c30c16a96b705