[INFO] crate iron_config 0.1.1 is already in cache
[INFO] extracting crate iron_config 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/iron_config/0.1.1
[INFO] extracting crate iron_config 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iron_config/0.1.1
[INFO] validating manifest of iron_config-0.1.1 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iron_config-0.1.1 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing iron_config-0.1.1
[INFO] finished frobbing iron_config-0.1.1
[INFO] frobbed toml for iron_config-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/iron_config/0.1.1/Cargo.toml
[INFO] started frobbing iron_config-0.1.1
[INFO] finished frobbing iron_config-0.1.1
[INFO] frobbed toml for iron_config-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/iron_config/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting iron_config-0.1.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/iron_config/0.1.1:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a96dfff5da9d2c419a163c1c2765d3d71b920a287858df014da1568dbc5f2b2d
[INFO] running `"docker" "start" "-a" "a96dfff5da9d2c419a163c1c2765d3d71b920a287858df014da1568dbc5f2b2d"`
[INFO] [stderr]     Checking iron_config v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     return re;
[INFO] [stderr]    |     ^^^^^^^^^^ help: remove `return` as shown: `re`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 | /     match tail {
[INFO] [stderr] 55 | |         Some(t) => {
[INFO] [stderr] 56 | |             let mut s2=t.splitn(2,"}");
[INFO] [stderr] 57 | |             let name=s2.next().unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 71 | |         None => {} 
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 54 |     if let Some(t) = tail {
[INFO] [stderr] 55 |     let mut s2=t.splitn(2,"}");
[INFO] [stderr] 56 |     let name=s2.next().unwrap();
[INFO] [stderr] 57 |     let tail2=s2.next();
[INFO] [stderr] 58 |     match tail2{
[INFO] [stderr] 59 |         Some(t2) => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/lib.rs:56:35
[INFO] [stderr]    |
[INFO] [stderr] 56 |             let mut s2=t.splitn(2,"}");
[INFO] [stderr]    |                                   ^^^ help: try using a char instead: `'}'`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lib.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 | /             match tail2{
[INFO] [stderr] 60 | |                 Some(t2) => {
[INFO] [stderr] 61 | |                     if let Some(val) = env::var_os(name){
[INFO] [stderr] 62 | |                         re.push_str(&env_recur(val.to_str().unwrap()));
[INFO] [stderr] ...  |
[INFO] [stderr] 68 | |                 None => {}
[INFO] [stderr] 69 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 59 |             if let Some(t2) = tail2 {
[INFO] [stderr] 60 |     if let Some(val) = env::var_os(name){
[INFO] [stderr] 61 |         re.push_str(&env_recur(val.to_str().unwrap()));
[INFO] [stderr] 62 |     }
[INFO] [stderr] 63 |     if t2 != ""{
[INFO] [stderr] 64 |         re.push_str(&env_recur(t2));
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     return re;
[INFO] [stderr]    |     ^^^^^^^^^^ help: remove `return` as shown: `re`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lib.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 | /     match tail {
[INFO] [stderr] 55 | |         Some(t) => {
[INFO] [stderr] 56 | |             let mut s2=t.splitn(2,"}");
[INFO] [stderr] 57 | |             let name=s2.next().unwrap();
[INFO] [stderr] ...  |
[INFO] [stderr] 71 | |         None => {} 
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 54 |     if let Some(t) = tail {
[INFO] [stderr] 55 |     let mut s2=t.splitn(2,"}");
[INFO] [stderr] 56 |     let name=s2.next().unwrap();
[INFO] [stderr] 57 |     let tail2=s2.next();
[INFO] [stderr] 58 |     match tail2{
[INFO] [stderr] 59 |         Some(t2) => {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/lib.rs:56:35
[INFO] [stderr]    |
[INFO] [stderr] 56 |             let mut s2=t.splitn(2,"}");
[INFO] [stderr]    |                                   ^^^ help: try using a char instead: `'}'`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/lib.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 | /             match tail2{
[INFO] [stderr] 60 | |                 Some(t2) => {
[INFO] [stderr] 61 | |                     if let Some(val) = env::var_os(name){
[INFO] [stderr] 62 | |                         re.push_str(&env_recur(val.to_str().unwrap()));
[INFO] [stderr] ...  |
[INFO] [stderr] 68 | |                 None => {}
[INFO] [stderr] 69 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 59 |             if let Some(t2) = tail2 {
[INFO] [stderr] 60 |     if let Some(val) = env::var_os(name){
[INFO] [stderr] 61 |         re.push_str(&env_recur(val.to_str().unwrap()));
[INFO] [stderr] 62 |     }
[INFO] [stderr] 63 |     if t2 != ""{
[INFO] [stderr] 64 |         re.push_str(&env_recur(t2));
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "a96dfff5da9d2c419a163c1c2765d3d71b920a287858df014da1568dbc5f2b2d"`
[INFO] running `"docker" "rm" "-f" "a96dfff5da9d2c419a163c1c2765d3d71b920a287858df014da1568dbc5f2b2d"`
[INFO] [stdout] a96dfff5da9d2c419a163c1c2765d3d71b920a287858df014da1568dbc5f2b2d