[INFO] updating cached repository elipmoc/RustLambda
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/elipmoc/RustLambda
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/elipmoc/RustLambda" "work/ex/clippy-test-run/sources/stable/gh/elipmoc/RustLambda"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/elipmoc/RustLambda'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/elipmoc/RustLambda" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/elipmoc/RustLambda"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/elipmoc/RustLambda'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 94b33732a57ae0b6a40da336927e46c3bfaa67e5
[INFO] sha for GitHub repo elipmoc/RustLambda: 94b33732a57ae0b6a40da336927e46c3bfaa67e5
[INFO] validating manifest of elipmoc/RustLambda 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 elipmoc/RustLambda 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 elipmoc/RustLambda
[INFO] finished frobbing elipmoc/RustLambda
[INFO] frobbed toml for elipmoc/RustLambda written to work/ex/clippy-test-run/sources/stable/gh/elipmoc/RustLambda/Cargo.toml
[INFO] started frobbing elipmoc/RustLambda
[INFO] finished frobbing elipmoc/RustLambda
[INFO] frobbed toml for elipmoc/RustLambda written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/elipmoc/RustLambda/Cargo.toml
[INFO] crate elipmoc/RustLambda has a lockfile. skipping
[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 elipmoc/RustLambda against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/elipmoc/RustLambda:/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] 0d56b7f38c695ab21353133ab7225fd344c78abefe00e557531fb451b631dc8a
[INFO] running `"docker" "start" "-a" "0d56b7f38c695ab21353133ab7225fd344c78abefe00e557531fb451b631dc8a"`
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking combine v3.3.0
[INFO] [stderr]     Checking rustλ v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: Try with `expr_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `expr_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `apply_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `apply_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `def_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `def_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `term_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `term_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `id_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `id_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `paren_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `paren_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: Try with `expr_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `expr_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `apply_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `apply_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `def_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `def_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `term_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `term_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `id_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `id_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `paren_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: All the struct fields are matched to a wildcard pattern, consider using `..`.
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `paren_parser { .. }` instead
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:17:35
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn show_def(arg_name: &str, body: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn show_apply(left: &Box<MixtureLambdaAST>, right: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:21:52
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn show_apply(left: &Box<MixtureLambdaAST>, right: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]   --> lambda/mixture_lambda/to_ski.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 |         _ if body.def_id_used(&id) == false => {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!body.def_id_used(&id)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | / parser!{
[INFO] [stderr] 27 | |    fn expr_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 28 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 29 | |     {
[INFO] [stderr] 30 | |         apply_parser()
[INFO] [stderr] 31 | |     }
[INFO] [stderr] 32 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | / parser!{
[INFO] [stderr] 36 | |     fn apply_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 37 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 38 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 48 | |     }
[INFO] [stderr] 49 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | / parser!{
[INFO] [stderr] 53 | |     fn def_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 54 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 55 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | / parser!{
[INFO] [stderr] 65 | |     fn term_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 66 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 67 | |     {
[INFO] [stderr] 68 | |         id_parser().then( |s|value(MixtureLambdaAST::Id(s)) ).or(paren_parser()).or(def_parser())
[INFO] [stderr] 69 | |     }
[INFO] [stderr] 70 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / parser!{
[INFO] [stderr] 74 | |     fn id_parser[I]()(I) -> String
[INFO] [stderr] 75 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 76 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 80 | |     }
[INFO] [stderr] 81 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> lambda/mixture_lambda/parser.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / parser!{
[INFO] [stderr] 85 | |     fn paren_parser[I]()(I) -> MixtureLambdaAST
[INFO] [stderr] 86 | |     where [I: Stream<Item=char>]
[INFO] [stderr] 87 | |     {
[INFO] [stderr] 88 | |         char('(').with(expr_parser()).skip(char(')'))
[INFO] [stderr] 89 | |     }
[INFO] [stderr] 90 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:17:35
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn show_def(arg_name: &str, body: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:21:21
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn show_apply(left: &Box<MixtureLambdaAST>, right: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> lambda/mixture_lambda/show.rs:21:52
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn show_apply(left: &Box<MixtureLambdaAST>, right: &Box<MixtureLambdaAST>) -> String {
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&MixtureLambdaAST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]   --> lambda/mixture_lambda/to_ski.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 |         _ if body.def_id_used(&id) == false => {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!body.def_id_used(&id)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[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/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 | /         match expr {
[INFO] [stderr] 19 | |             //パースしたASTが示すラムダ計算を表示
[INFO] [stderr] 20 | |             Ok((value, _)) => {
[INFO] [stderr] 21 | |                 //  println!("show: {}", value.show());
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | |             Err(_) => (),
[INFO] [stderr] 32 | |         };
[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] 18 |         if let Ok((value, _)) = expr {
[INFO] [stderr] 19 |     //  println!("show: {}", value.show());
[INFO] [stderr] 20 |     let beta_convert = value.reduction();
[INFO] [stderr] 21 |     let to_ski = beta_convert.to_ski();
[INFO] [stderr] 22 |     let to_pure = to_ski.to_pure();
[INFO] [stderr] 23 |     let beta_convert2 = to_pure.reduction();
[INFO] [stderr]  ...
[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/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 | /         match expr {
[INFO] [stderr] 19 | |             //パースしたASTが示すラムダ計算を表示
[INFO] [stderr] 20 | |             Ok((value, _)) => {
[INFO] [stderr] 21 | |                 //  println!("show: {}", value.show());
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | |             Err(_) => (),
[INFO] [stderr] 32 | |         };
[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] 18 |         if let Ok((value, _)) = expr {
[INFO] [stderr] 19 |     //  println!("show: {}", value.show());
[INFO] [stderr] 20 |     let beta_convert = value.reduction();
[INFO] [stderr] 21 |     let to_ski = beta_convert.to_ski();
[INFO] [stderr] 22 |     let to_pure = to_ski.to_pure();
[INFO] [stderr] 23 |     let beta_convert2 = to_pure.reduction();
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.27s
[INFO] running `"docker" "inspect" "0d56b7f38c695ab21353133ab7225fd344c78abefe00e557531fb451b631dc8a"`
[INFO] running `"docker" "rm" "-f" "0d56b7f38c695ab21353133ab7225fd344c78abefe00e557531fb451b631dc8a"`
[INFO] [stdout] 0d56b7f38c695ab21353133ab7225fd344c78abefe00e557531fb451b631dc8a