[INFO] updating cached repository Nasafato/parser-combinators
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Nasafato/parser-combinators
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Nasafato/parser-combinators" "work/ex/beta-1.38-1/sources/1.37.0/gh/Nasafato/parser-combinators"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Nasafato/parser-combinators'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Nasafato/parser-combinators" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fad190618ec9ee7ead185c85d02113e62f845065
[INFO] sha for GitHub repo Nasafato/parser-combinators: fad190618ec9ee7ead185c85d02113e62f845065
[INFO] validating manifest of Nasafato/parser-combinators on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Nasafato/parser-combinators on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Nasafato/parser-combinators
[INFO] finished frobbing Nasafato/parser-combinators
[INFO] frobbed toml for Nasafato/parser-combinators written to work/ex/beta-1.38-1/sources/1.37.0/gh/Nasafato/parser-combinators/Cargo.toml
[INFO] started frobbing Nasafato/parser-combinators
[INFO] finished frobbing Nasafato/parser-combinators
[INFO] frobbed toml for Nasafato/parser-combinators written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators/Cargo.toml
[INFO] crate Nasafato/parser-combinators already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Nasafato/parser-combinators against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 12a21f0091220d54353f2912d2b28c67228afd56a25cf87e5357ff9c6134d609
[INFO] running `"docker" "start" "-a" "12a21f0091220d54353f2912d2b28c67228afd56a25cf87e5357ff9c6134d609"`
[INFO] [stderr]    Compiling parser_combinators v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_literal`
[INFO] [stderr]   --> src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn match_literal<'a>(expected: &'static str) -> impl Parser<'a, ()> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identifier`
[INFO] [stderr]   --> src/lib.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn identifier(input: &str) -> ParseResult<String> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map`
[INFO] [stderr]    --> src/lib.rs:91:1
[INFO] [stderr]     |
[INFO] [stderr] 91  | / fn map<'a, P, F, A, B>(parser: P, map_fn: F) -> impl Parser<'a, B>
[INFO] [stderr] 92  | | where
[INFO] [stderr] 93  | |   P: Parser<'a, A>,
[INFO] [stderr] 94  | |   F: Fn(A) -> B,
[INFO] [stderr] ...   |
[INFO] [stderr] 100 | |   }
[INFO] [stderr] 101 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pair`
[INFO] [stderr]    --> src/lib.rs:103:1
[INFO] [stderr]     |
[INFO] [stderr] 103 | / fn pair<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, (R1, R2)>
[INFO] [stderr] 104 | | where
[INFO] [stderr] 105 | |   P1: Parser<'a, R1>,
[INFO] [stderr] 106 | |   P2: Parser<'a, R2>,
[INFO] [stderr] ...   |
[INFO] [stderr] 114 | |   }
[INFO] [stderr] 115 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `left`
[INFO] [stderr]    --> src/lib.rs:117:1
[INFO] [stderr]     |
[INFO] [stderr] 117 | / fn left<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R1>
[INFO] [stderr] 118 | | where
[INFO] [stderr] 119 | |   P1: Parser<'a, R1>,
[INFO] [stderr] 120 | |   P2: Parser<'a, R2>,
[INFO] [stderr] 121 | | {
[INFO] [stderr] 122 | |   map(pair(parser1, parser2), |(left, _right)| left)
[INFO] [stderr] 123 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right`
[INFO] [stderr]    --> src/lib.rs:125:1
[INFO] [stderr]     |
[INFO] [stderr] 125 | / fn right<'a, P1, P2, R1, R2>(parser1: P1, parser2: P2) -> impl Parser<'a, R2>
[INFO] [stderr] 126 | | where
[INFO] [stderr] 127 | |   P1: Parser<'a, R1>,
[INFO] [stderr] 128 | |   P2: Parser<'a, R2>,
[INFO] [stderr] 129 | | {
[INFO] [stderr] 130 | |   map(pair(parser1, parser2), |(_left, right)| right)
[INFO] [stderr] 131 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `one_or_more`
[INFO] [stderr]    --> src/lib.rs:182:1
[INFO] [stderr]     |
[INFO] [stderr] 182 | / fn one_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr] 183 | | where
[INFO] [stderr] 184 | |   P: Parser<'a, A>,
[INFO] [stderr] 185 | | {
[INFO] [stderr] ...   |
[INFO] [stderr] 202 | |   }
[INFO] [stderr] 203 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `zero_or_more`
[INFO] [stderr]    --> src/lib.rs:205:1
[INFO] [stderr]     |
[INFO] [stderr] 205 | / fn zero_or_more<'a, P, A>(parser: P) -> impl Parser<'a, Vec<A>>
[INFO] [stderr] 206 | | where
[INFO] [stderr] 207 | |   P: Parser<'a, A>,
[INFO] [stderr] 208 | | {
[INFO] [stderr] ...   |
[INFO] [stderr] 218 | |   }
[INFO] [stderr] 219 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `any_char`
[INFO] [stderr]    --> src/lib.rs:237:1
[INFO] [stderr]     |
[INFO] [stderr] 237 | fn any_char(input: &str) -> ParseResult<char> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pred`
[INFO] [stderr]    --> src/lib.rs:244:1
[INFO] [stderr]     |
[INFO] [stderr] 244 | / fn pred<'a, P, A, F>(parser: P, predicate: F) -> impl Parser<'a, A>
[INFO] [stderr] 245 | | where
[INFO] [stderr] 246 | |   P: Parser<'a, A>,
[INFO] [stderr] 247 | |   F: Fn(&A) -> bool,
[INFO] [stderr] ...   |
[INFO] [stderr] 256 | |   }
[INFO] [stderr] 257 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `whitespace_char`
[INFO] [stderr]    --> src/lib.rs:266:1
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn whitespace_char<'a>() -> impl Parser<'a, char> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space1`
[INFO] [stderr]    --> src/lib.rs:270:1
[INFO] [stderr]     |
[INFO] [stderr] 270 | fn space1<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:1
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `quoted_string`
[INFO] [stderr]    --> src/lib.rs:278:1
[INFO] [stderr]     |
[INFO] [stderr] 278 | fn quoted_string<'a>() -> impl Parser<'a, String> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attribute_pair`
[INFO] [stderr]    --> src/lib.rs:297:1
[INFO] [stderr]     |
[INFO] [stderr] 297 | fn attribute_pair<'a>() -> impl Parser<'a, (String, String)> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `attributes`
[INFO] [stderr]    --> src/lib.rs:301:1
[INFO] [stderr]     |
[INFO] [stderr] 301 | fn attributes<'a>() -> impl Parser<'a, Vec<(String, String)>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element_start`
[INFO] [stderr]    --> src/lib.rs:319:1
[INFO] [stderr]     |
[INFO] [stderr] 319 | fn element_start<'a>() -> impl Parser<'a, (String, Vec<(String, String)>)> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `single_element`
[INFO] [stderr]    --> src/lib.rs:323:1
[INFO] [stderr]     |
[INFO] [stderr] 323 | fn single_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BoxedParser`
[INFO] [stderr]    --> src/lib.rs:346:1
[INFO] [stderr]     |
[INFO] [stderr] 346 | struct BoxedParser<'a, Output> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/lib.rs:351:3
[INFO] [stderr]     |
[INFO] [stderr] 351 | /   fn new<P>(parser: P) -> Self
[INFO] [stderr] 352 | |   where
[INFO] [stderr] 353 | |     P: Parser<'a, Output> + 'a,
[INFO] [stderr] 354 | |   {
[INFO] [stderr] ...   |
[INFO] [stderr] 357 | |     }
[INFO] [stderr] 358 | |   }
[INFO] [stderr]     | |___^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:1
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:1
[INFO] [stderr]     |
[INFO] [stderr] 375 | / fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr] 376 | | where
[INFO] [stderr] 377 | |   P1: Parser<'a, A>,
[INFO] [stderr] 378 | |   P2: Parser<'a, A>,
[INFO] [stderr] ...   |
[INFO] [stderr] 383 | |   }
[INFO] [stderr] 384 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:1
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:1
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:1
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:1
[INFO] [stderr]     |
[INFO] [stderr] 405 | / fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr] 406 | | where
[INFO] [stderr] 407 | |   P: Parser<'a, A>,
[INFO] [stderr] 408 | |   NextP: Parser<'a, B>,
[INFO] [stderr] ...   |
[INFO] [stderr] 414 | |   }
[INFO] [stderr] 415 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]  --> src/main.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         Ok((input, output)) => println!("{} => ", input,),
[INFO] [stderr]   |                    ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `"docker" "inspect" "12a21f0091220d54353f2912d2b28c67228afd56a25cf87e5357ff9c6134d609"`
[INFO] running `"docker" "rm" "-f" "12a21f0091220d54353f2912d2b28c67228afd56a25cf87e5357ff9c6134d609"`
[INFO] [stdout] 12a21f0091220d54353f2912d2b28c67228afd56a25cf87e5357ff9c6134d609
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] a5bac843b63c23c04f23d283d7b757ceee87f1ea64d5c56d485828912682345c
[INFO] running `"docker" "start" "-a" "a5bac843b63c23c04f23d283d7b757ceee87f1ea64d5c56d485828912682345c"`
[INFO] [stderr]    Compiling parser_combinators v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]  --> src/main.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         Ok((input, output)) => println!("{} => ", input,),
[INFO] [stderr]   |                    ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/lib.rs:251:10
[INFO] [stderr]     |
[INFO] [stderr] 251 |       if (predicate(&value)) {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `space0`
[INFO] [stderr]    --> src/lib.rs:274:1
[INFO] [stderr]     |
[INFO] [stderr] 274 | fn space0<'a>() -> impl Parser<'a, Vec<char>> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `open_element`
[INFO] [stderr]    --> src/lib.rs:367:1
[INFO] [stderr]     |
[INFO] [stderr] 367 | fn open_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `either`
[INFO] [stderr]    --> src/lib.rs:375:1
[INFO] [stderr]     |
[INFO] [stderr] 375 | / fn either<'a, P1, P2, A>(parser1: P1, parser2: P2) -> impl Parser<'a, A>
[INFO] [stderr] 376 | | where
[INFO] [stderr] 377 | |   P1: Parser<'a, A>,
[INFO] [stderr] 378 | |   P2: Parser<'a, A>,
[INFO] [stderr] ...   |
[INFO] [stderr] 383 | |   }
[INFO] [stderr] 384 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `element`
[INFO] [stderr]    --> src/lib.rs:386:1
[INFO] [stderr]     |
[INFO] [stderr] 386 | fn element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `close_element`
[INFO] [stderr]    --> src/lib.rs:390:1
[INFO] [stderr]     |
[INFO] [stderr] 390 | fn close_element<'a>(expected_name: String) -> impl Parser<'a, String> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parent_element`
[INFO] [stderr]    --> src/lib.rs:395:1
[INFO] [stderr]     |
[INFO] [stderr] 395 | fn parent_element<'a>() -> impl Parser<'a, Element> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `and_then`
[INFO] [stderr]    --> src/lib.rs:405:1
[INFO] [stderr]     |
[INFO] [stderr] 405 | / fn and_then<'a, P, F, A, B, NextP>(parser: P, f: F) -> impl Parser<'a, B>
[INFO] [stderr] 406 | | where
[INFO] [stderr] 407 | |   P: Parser<'a, A>,
[INFO] [stderr] 408 | |   NextP: Parser<'a, B>,
[INFO] [stderr] ...   |
[INFO] [stderr] 414 | |   }
[INFO] [stderr] 415 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `"docker" "inspect" "a5bac843b63c23c04f23d283d7b757ceee87f1ea64d5c56d485828912682345c"`
[INFO] running `"docker" "rm" "-f" "a5bac843b63c23c04f23d283d7b757ceee87f1ea64d5c56d485828912682345c"`
[INFO] [stdout] a5bac843b63c23c04f23d283d7b757ceee87f1ea64d5c56d485828912682345c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nasafato/parser-combinators:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] a6cb352be623217b52443e7696d05823bb12c1d83507635846bd7c2120273298
[INFO] running `"docker" "start" "-a" "a6cb352be623217b52443e7696d05823bb12c1d83507635846bd7c2120273298"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/parser_combinators-d87c9013c52a510a
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test predicate_combinator ... ok
[INFO] [stdout] test quoted_string_parser ... ok
[INFO] [stdout] test pair_combinator ... ok
[INFO] [stdout] test one_or_more_combinator ... ok
[INFO] [stdout] test literal_parser ... ok
[INFO] [stdout] test identifier_parser ... ok
[INFO] [stdout] test attribute_parser ... ok
[INFO] [stdout] test zero_or_more_combinator ... ok
[INFO] [stdout] test single_element_parser ... ok
[INFO] [stdout] test right_combinator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/parser_combinators-e48363efdfd09c86
[INFO] [stderr]    Doc-tests parser_combinators
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a6cb352be623217b52443e7696d05823bb12c1d83507635846bd7c2120273298"`
[INFO] running `"docker" "rm" "-f" "a6cb352be623217b52443e7696d05823bb12c1d83507635846bd7c2120273298"`
[INFO] [stdout] a6cb352be623217b52443e7696d05823bb12c1d83507635846bd7c2120273298