[INFO] fetching crate markab_parser 0.7.0...
[INFO] testing markab_parser-0.7.0 against try#0abe69e6c16114311cc2700e972492e64d69c28f for pr-154065-1
[INFO] extracting crate markab_parser 0.7.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate markab_parser 0.7.0
[INFO] finished tweaking crates.io crate markab_parser 0.7.0
[INFO] tweaked toml for crates.io crate markab_parser 0.7.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate markab_parser 0.7.0 on toolchain 0abe69e6c16114311cc2700e972492e64d69c28f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba944ef4c0cbb2b36605f3cba1162bfca53560518a7706e29bcb6e005c14fb83
[INFO] running `Command { std: "docker" "start" "-a" "ba944ef4c0cbb2b36605f3cba1162bfca53560518a7706e29bcb6e005c14fb83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba944ef4c0cbb2b36605f3cba1162bfca53560518a7706e29bcb6e005c14fb83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba944ef4c0cbb2b36605f3cba1162bfca53560518a7706e29bcb6e005c14fb83", kill_on_drop: false }`
[INFO] [stdout] ba944ef4c0cbb2b36605f3cba1162bfca53560518a7706e29bcb6e005c14fb83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 337789b3cfd46d76645c5ccb462a0feb8d61afbe9ddce6274f1ae93936f43d22
[INFO] running `Command { std: "docker" "start" "-a" "337789b3cfd46d76645c5ccb462a0feb8d61afbe9ddce6274f1ae93936f43d22", kill_on_drop: false }`
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling markab_parser v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a dyn Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a Fn(P::Output) -> R,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a dyn Fn(P::Output) -> R,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:50:30
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a dyn Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:57:37
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a dyn Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:32:45
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a dyn Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:26:41
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a dyn Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/string_parser/utility.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser
[INFO] [stdout]   |                            ^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                            |
[INFO] [stdout]   |                            the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser<'_>
[INFO] [stdout]   |                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "337789b3cfd46d76645c5ccb462a0feb8d61afbe9ddce6274f1ae93936f43d22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "337789b3cfd46d76645c5ccb462a0feb8d61afbe9ddce6274f1ae93936f43d22", kill_on_drop: false }`
[INFO] [stdout] 337789b3cfd46d76645c5ccb462a0feb8d61afbe9ddce6274f1ae93936f43d22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93de29f3fb24863a6fc8260c478b13842106ae2553abee06b138182f157458de
[INFO] running `Command { std: "docker" "start" "-a" "93de29f3fb24863a6fc8260c478b13842106ae2553abee06b138182f157458de", kill_on_drop: false }`
[INFO] [stderr]    Compiling markab_parser v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a dyn Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a Fn(P::Output) -> R,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a dyn Fn(P::Output) -> R,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:50:30
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a dyn Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:57:37
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a dyn Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:32:45
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a dyn Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:26:41
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a dyn Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/string_parser/utility.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser
[INFO] [stdout]   |                            ^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                            |
[INFO] [stdout]   |                            the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser<'_>
[INFO] [stdout]   |                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 |     generator: &'a dyn Fn(&P1::Output) -> P2,
[INFO] [stdout]    |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a Fn(P::Output) -> R,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 19 |     mapper: &'a dyn Fn(P::Output) -> R,
[INFO] [stdout]    |                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:50:30
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 |     fn map<R>(self, mapper: &'a dyn Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:57:37
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn and_gen<P>(self, generator: &'a dyn Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stdout]    |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gen_parser/parser.rs:32:45
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn new(requirement: P1, generator: &'a dyn Fn(&P1::Output) -> P2) -> Self
[INFO] [stdout]    |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/map_parser/parser.rs:26:41
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn new(requirement: P, mapper: &'a dyn Fn(P::Output) -> R) -> Self
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/map_parser/parser.rs:88:6
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let res = parser.parse(src, &mut pos);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]  --> src/string_parser/utility.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser
[INFO] [stdout]   |                            ^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]   |                            |
[INFO] [stdout]   |                            the lifetime is elided here
[INFO] [stdout]   |
[INFO] [stdout]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn string(requirement: &str) -> StringParser<'_>
[INFO] [stdout]   |                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "93de29f3fb24863a6fc8260c478b13842106ae2553abee06b138182f157458de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93de29f3fb24863a6fc8260c478b13842106ae2553abee06b138182f157458de", kill_on_drop: false }`
[INFO] [stdout] 93de29f3fb24863a6fc8260c478b13842106ae2553abee06b138182f157458de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0abe69e6c16114311cc2700e972492e64d69c28f" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a5de68dc5ddb18402335c05876615d2bfed7be63a21f064a37e02403903a1bbb
[INFO] running `Command { std: "docker" "start" "-a" "a5de68dc5ddb18402335c05876615d2bfed7be63a21f064a37e02403903a1bbb", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gen_parser/parser.rs:24:17
[INFO] [stderr]    |
[INFO] [stderr] 24 |     generator: &'a Fn(&P1::Output) -> P2,
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 24 |     generator: &'a dyn Fn(&P1::Output) -> P2,
[INFO] [stderr]    |                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/map_parser/parser.rs:19:14
[INFO] [stderr]    |
[INFO] [stderr] 19 |     mapper: &'a Fn(P::Output) -> R,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 19 |     mapper: &'a dyn Fn(P::Output) -> R,
[INFO] [stderr]    |                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:50:30
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn map<R>(self, mapper: &'a Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn map<R>(self, mapper: &'a dyn Fn(Self::Output) -> R) -> MapParser<'a, Self, R>
[INFO] [stderr]    |                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:57:37
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn and_gen<P>(self, generator: &'a Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn and_gen<P>(self, generator: &'a dyn Fn(&Self::Output) -> P) -> GenParser<'a, Self, P>
[INFO] [stderr]    |                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gen_parser/parser.rs:32:45
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn new(requirement: P1, generator: &'a Fn(&P1::Output) -> P2) -> Self
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn new(requirement: P1, generator: &'a dyn Fn(&P1::Output) -> P2) -> Self
[INFO] [stderr]    |                                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/map_parser/parser.rs:26:41
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn new(requirement: P, mapper: &'a Fn(P::Output) -> R) -> Self
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn new(requirement: P, mapper: &'a dyn Fn(P::Output) -> R) -> Self
[INFO] [stderr]    |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]  --> src/string_parser/utility.rs:3:28
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn string(requirement: &str) -> StringParser
[INFO] [stderr]   |                            ^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]   |                            |
[INFO] [stderr]   |                            the lifetime is elided here
[INFO] [stderr]   |
[INFO] [stderr]   = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn string(requirement: &str) -> StringParser<'_>
[INFO] [stderr]   |                                                 ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `markab_parser` (lib) generated 7 warnings (run `cargo fix --lib -p markab_parser` to apply 7 suggestions)
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/map_parser/parser.rs:88:6
[INFO] [stderr]    |
[INFO] [stderr] 88 |     let res = parser.parse(src, &mut pos);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `markab_parser` (lib test) generated 8 warnings (7 duplicates) (run `cargo fix --lib -p markab_parser --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/markab_parser-3d477d225a5bdc9d)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test map_parser::parser::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests markab_parser
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/lib.rs - (line 67) ... ok
[INFO] [stdout] test src/lib.rs - (line 36) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.27s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a5de68dc5ddb18402335c05876615d2bfed7be63a21f064a37e02403903a1bbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5de68dc5ddb18402335c05876615d2bfed7be63a21f064a37e02403903a1bbb", kill_on_drop: false }`
[INFO] [stdout] a5de68dc5ddb18402335c05876615d2bfed7be63a21f064a37e02403903a1bbb
