[INFO] updating cached repository athorwall/parser-combinators
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/athorwall/parser-combinators
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/athorwall/parser-combinators" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/athorwall/parser-combinators"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/athorwall/parser-combinators'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/athorwall/parser-combinators" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/athorwall/parser-combinators"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/athorwall/parser-combinators'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e9dc572158cc0e1493cb8b3c0637a4d8d7013b8b
[INFO] sha for GitHub repo athorwall/parser-combinators: e9dc572158cc0e1493cb8b3c0637a4d8d7013b8b
[INFO] validating manifest of athorwall/parser-combinators on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of athorwall/parser-combinators on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing athorwall/parser-combinators
[INFO] finished frobbing athorwall/parser-combinators
[INFO] frobbed toml for athorwall/parser-combinators written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/athorwall/parser-combinators/Cargo.toml
[INFO] started frobbing athorwall/parser-combinators
[INFO] finished frobbing athorwall/parser-combinators
[INFO] frobbed toml for athorwall/parser-combinators written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/athorwall/parser-combinators/Cargo.toml
[INFO] crate athorwall/parser-combinators already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking athorwall/parser-combinators against try#06a150c7d11500b41499224f165e9de1de096768 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-3/try#06a150c7d11500b41499224f165e9de1de096768:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/athorwall/parser-combinators:/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" "+06a150c7d11500b41499224f165e9de1de096768-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 62abc0e85834dca983f62e2aed425145e80fd06e97b01e32f5333603820bc762
[INFO] running `"docker" "start" "-a" "62abc0e85834dca983f62e2aed425145e80fd06e97b01e32f5333603820bc762"`
[INFO] [stderr]     Checking parser-combinators v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/parser.rs:42:26
[INFO] [stderr]    |
[INFO] [stderr] 42 |                     Some(value) => {
[INFO] [stderr]    |                          ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_input`
[INFO] [stderr]   --> src/parser.rs:43:33
[INFO] [stderr]    |
[INFO] [stderr] 43 |                         let mut new_input = input.clone();
[INFO] [stderr]    |                                 ^^^^^^^^^ help: consider prefixing with an underscore: `_new_input`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/parser.rs:42:26
[INFO] [stderr]    |
[INFO] [stderr] 42 |                     Some(value) => {
[INFO] [stderr]    |                          ^^^^^ help: consider prefixing with an underscore: `_value`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `new_input`
[INFO] [stderr]   --> src/parser.rs:43:33
[INFO] [stderr]    |
[INFO] [stderr] 43 |                         let mut new_input = input.clone();
[INFO] [stderr]    |                                 ^^^^^^^^^ help: consider prefixing with an underscore: `_new_input`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]  --> src/parser.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Parser<'a, T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse`
[INFO] [stderr]  --> src/parser.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn parse(&self, input: &String) -> Result<T, String> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `map`
[INFO] [stderr]   --> src/parser.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn map<U>(self, func: Box<Fn(&T) -> U>) -> Parser<'a, U> where T: 'a, U: 'a {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `one`
[INFO] [stderr]   --> src/parser.rs:38:5
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn one(t: char) -> Parser<'a, char> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `combine`
[INFO] [stderr]   --> src/parser.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 | /     pub fn combine<'b, U>(p1: Parser<'b, U>, p2: Parser<'b, U>) -> Parser<'b, U>
[INFO] [stderr] 63 | |         where U: Copy + 'b {
[INFO] [stderr] 64 | |         Parser{
[INFO] [stderr] 65 | |             f: Box::from(move |input: &String| {
[INFO] [stderr] ...  |
[INFO] [stderr] 71 | |         }
[INFO] [stderr] 72 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `option`
[INFO] [stderr]   --> src/parser.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 | /     pub fn option<'b, U>(p1: Parser<'b, U>, p2: Parser<'b, U>) -> Parser<'b, U>
[INFO] [stderr] 76 | |         where U: Copy + 'b {
[INFO] [stderr] 77 | |         Parser{
[INFO] [stderr] 78 | |             f: Box::from(move |input: &String| {
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |         }
[INFO] [stderr] 87 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `bind`
[INFO] [stderr]    --> src/parser.rs:90:5
[INFO] [stderr]     |
[INFO] [stderr] 90  | /     pub fn bind<'b, U, V>(p1: Parser<'b, U>, p2: Box<Fn(U) -> Parser<'b, V>>) -> Parser<'b, V>
[INFO] [stderr] 91  | |         where U: Copy + 'b, V: 'b {
[INFO] [stderr] 92  | |         Parser{
[INFO] [stderr] 93  | |             f: Box::from(move |input: &String| {
[INFO] [stderr] ...   |
[INFO] [stderr] 100 | |         }
[INFO] [stderr] 101 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:153:21
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 let mut s = a.to_string();
[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/parser.rs:153:21
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 let mut s = a.to_string();
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "62abc0e85834dca983f62e2aed425145e80fd06e97b01e32f5333603820bc762"`
[INFO] running `"docker" "rm" "-f" "62abc0e85834dca983f62e2aed425145e80fd06e97b01e32f5333603820bc762"`
[INFO] [stdout] 62abc0e85834dca983f62e2aed425145e80fd06e97b01e32f5333603820bc762