[INFO] fetching crate ruly 4.1.1...
[INFO] checking ruly-4.1.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate ruly 4.1.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate ruly 4.1.1 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruly 4.1.1
[INFO] finished tweaking crates.io crate ruly 4.1.1
[INFO] tweaked toml for crates.io crate ruly 4.1.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13d554ad9db308c457f3e260ee258be273f3d69b1b137361c75cbefbdf3c32ce
[INFO] running `Command { std: "docker" "start" "-a" "13d554ad9db308c457f3e260ee258be273f3d69b1b137361c75cbefbdf3c32ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13d554ad9db308c457f3e260ee258be273f3d69b1b137361c75cbefbdf3c32ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13d554ad9db308c457f3e260ee258be273f3d69b1b137361c75cbefbdf3c32ce", kill_on_drop: false }`
[INFO] [stdout] 13d554ad9db308c457f3e260ee258be273f3d69b1b137361c75cbefbdf3c32ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 767b4cb8f2b748e32115170be51654764f8ffd2879cc052882ded32718299a96
[INFO] running `Command { std: "docker" "start" "-a" "767b4cb8f2b748e32115170be51654764f8ffd2879cc052882ded32718299a96", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]    Compiling pmacro_ruly v2.2.0
[INFO] [stderr]     Checking regex-automata v0.4.7
[INFO] [stderr]     Checking regex v1.10.6
[INFO] [stderr]     Checking ruly v4.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `ReservedWords` should have an upper case name
[INFO] [stdout]    --> src/lib.rs:195:15
[INFO] [stdout]     |
[INFO] [stdout] 195 |         const ReservedWords: [&str; 0 $(  + { $e ; 1 } )* ] = [ $( $e ),* ];
[INFO] [stdout]     |               ^^^^^^^^^^^^^ help: convert the identifier to upper case: `RESERVED_WORDS`
[INFO] [stdout] ...
[INFO] [stdout] 303 |         reserved_words!();
[INFO] [stdout]     |         ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `reserved_words` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:305:9
[INFO] [stdout]     |
[INFO] [stdout] 305 | /         add_rule!(
[INFO] [stdout] 306 | |             Nat => Zero ({("Z")})
[INFO] [stdout] 307 | |                 |   Succ ({("S")},{(r"\(")},Nat,{(r"\)")})
[INFO] [stdout] 308 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:310:9
[INFO] [stdout]     |
[INFO] [stdout] 310 | /         add_rule!(
[INFO] [stdout] 311 | |             Judgement => Plus (Nat, {("plus")}, Nat, {("is")}, Nat)
[INFO] [stdout] 312 | |                 |   Times (Nat, {("times")}, Nat, {("is")}, Nat)
[INFO] [stdout] 313 | |         );
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in the macro `write` which comes from the expansion of the macro `add_rule` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.60s
[INFO] running `Command { std: "docker" "inspect" "767b4cb8f2b748e32115170be51654764f8ffd2879cc052882ded32718299a96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "767b4cb8f2b748e32115170be51654764f8ffd2879cc052882ded32718299a96", kill_on_drop: false }`
[INFO] [stdout] 767b4cb8f2b748e32115170be51654764f8ffd2879cc052882ded32718299a96