[INFO] fetching crate nano_parser_gen_macro 0.2.1...
[INFO] checking nano_parser_gen_macro-0.2.1 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate nano_parser_gen_macro 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate nano_parser_gen_macro 0.2.1 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nano_parser_gen_macro 0.2.1
[INFO] finished tweaking crates.io crate nano_parser_gen_macro 0.2.1
[INFO] tweaked toml for crates.io crate nano_parser_gen_macro 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 636f3319c4af80f461e00abd19b07c31abee9daf1864331990e517e94c7303a2
[INFO] running `Command { std: "docker" "start" "-a" "636f3319c4af80f461e00abd19b07c31abee9daf1864331990e517e94c7303a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "636f3319c4af80f461e00abd19b07c31abee9daf1864331990e517e94c7303a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "636f3319c4af80f461e00abd19b07c31abee9daf1864331990e517e94c7303a2", kill_on_drop: false }`
[INFO] [stdout] 636f3319c4af80f461e00abd19b07c31abee9daf1864331990e517e94c7303a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1c52d38a74fa8687c798a477a4253d6d04c6bbd177eea3f9321570ffa8ccbb5
[INFO] running `Command { std: "docker" "start" "-a" "a1c52d38a74fa8687c798a477a4253d6d04c6bbd177eea3f9321570ffa8ccbb5", kill_on_drop: false }`
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking syn v2.0.77
[INFO] [stderr]     Checking nano_parser_gen_macro v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `eq_token` is never read
[INFO] [stdout]   --> src/ast.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct TokenDeclRegex {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 24 |     pub name: Ident,
[INFO] [stdout] 25 |     pub eq_token: Token![=],
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Epsilon(Ident),
[INFO] [stdout]     |     ------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Epsilon(()),
[INFO] [stdout]     |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:137:10
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Pipe(Token![|]),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Pipe(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:138:10
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Semi(Token![;]),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Semi(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `end` is never read
[INFO] [stdout]    --> src/ast.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 141 | pub struct SubRule {
[INFO] [stdout]     |            ------- field in this struct
[INFO] [stdout] 142 |     pub entities: Vec<RuleEntity>,
[INFO] [stdout] 143 |     pub end: PipeOrSemi,
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coloncolon` and `eq` are never read
[INFO] [stdout]    --> src/ast.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub struct Rule {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 147 |     pub left: Ident,
[INFO] [stdout] 148 |     pub coloncolon: Token![::],
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 149 |     pub eq: Token![=],
[INFO] [stdout]     |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `eq_token` is never read
[INFO] [stdout]   --> src/ast.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct TokenDeclRegex {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 24 |     pub name: Ident,
[INFO] [stdout] 25 |     pub eq_token: Token![=],
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Epsilon(Ident),
[INFO] [stdout]     |     ------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Epsilon(()),
[INFO] [stdout]     |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:137:10
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Pipe(Token![|]),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Pipe(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:138:10
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Semi(Token![;]),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 138 |     Semi(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `end` is never read
[INFO] [stdout]    --> src/ast.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 141 | pub struct SubRule {
[INFO] [stdout]     |            ------- field in this struct
[INFO] [stdout] 142 |     pub entities: Vec<RuleEntity>,
[INFO] [stdout] 143 |     pub end: PipeOrSemi,
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `coloncolon` and `eq` are never read
[INFO] [stdout]    --> src/ast.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub struct Rule {
[INFO] [stdout]     |            ---- fields in this struct
[INFO] [stdout] 147 |     pub left: Ident,
[INFO] [stdout] 148 |     pub coloncolon: Token![::],
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 149 |     pub eq: Token![=],
[INFO] [stdout]     |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.91s
[INFO] running `Command { std: "docker" "inspect" "a1c52d38a74fa8687c798a477a4253d6d04c6bbd177eea3f9321570ffa8ccbb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1c52d38a74fa8687c798a477a4253d6d04c6bbd177eea3f9321570ffa8ccbb5", kill_on_drop: false }`
[INFO] [stdout] a1c52d38a74fa8687c798a477a4253d6d04c6bbd177eea3f9321570ffa8ccbb5