[INFO] fetching crate dynparser 0.4.2...
[INFO] checking dynparser-0.4.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate dynparser 0.4.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate dynparser 0.4.2 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dynparser 0.4.2
[INFO] finished tweaking crates.io crate dynparser 0.4.2
[INFO] tweaked toml for crates.io crate dynparser 0.4.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded idata v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92aa6b45c2e37143e631611ebde6495c5563d09d5fe5bf56446b99b53529ae4e
[INFO] running `Command { std: "docker" "start" "-a" "92aa6b45c2e37143e631611ebde6495c5563d09d5fe5bf56446b99b53529ae4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92aa6b45c2e37143e631611ebde6495c5563d09d5fe5bf56446b99b53529ae4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92aa6b45c2e37143e631611ebde6495c5563d09d5fe5bf56446b99b53529ae4e", kill_on_drop: false }`
[INFO] [stdout] 92aa6b45c2e37143e631611ebde6495c5563d09d5fe5bf56446b99b53529ae4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae90efac7fecd6447885be779a90dc0b1c00ae06ec3bc22dec13f464d2b6655c
[INFO] running `Command { std: "docker" "start" "-a" "ae90efac7fecd6447885be779a90dc0b1c00ae06ec3bc22dec13f464d2b6655c", kill_on_drop: false }`
[INFO] [stderr]     Checking idata v0.1.2
[INFO] [stderr]     Checking dynparser v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/ast/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]   --> src/ast/flat.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::result::Result;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Result` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 142 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:200:10
[INFO] [stdout]     |
[INFO] [stdout] 200 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:205:10
[INFO] [stdout]     |
[INFO] [stdout] 205 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `idata` is imported redundantly
[INFO] [stdout]    --> src/peg/mod.rs:10:13
[INFO] [stdout]     |
[INFO] [stdout] 10  | use idata::{self, cont::IVec};
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:109:1
[INFO] [stdout]     |
[INFO] [stdout] 109 | extern crate idata;
[INFO] [stdout]     | ------------------- the item `idata` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/peg/mod.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{self, result};
[INFO] [stdout]    |           ^^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/peg/mod.rs:338:6
[INFO] [stdout]     |
[INFO] [stdout] 338 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/peg/mod.rs:726:98
[INFO] [stdout]     |
[INFO] [stdout] 726 |         let (to, _) = idata::consume_char(chars).ok_or_else(|| error_peg_s("expected to char"))?;;
[INFO] [stdout]     |                                                                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/ast/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]   --> src/ast/flat.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::result::Result;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Result` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 142 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:200:10
[INFO] [stdout]     |
[INFO] [stdout] 200 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/ast/mod.rs:205:10
[INFO] [stdout]     |
[INFO] [stdout] 205 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `idata` is imported redundantly
[INFO] [stdout]    --> src/peg/mod.rs:10:13
[INFO] [stdout]     |
[INFO] [stdout] 10  | use idata::{self, cont::IVec};
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:109:1
[INFO] [stdout]     |
[INFO] [stdout] 109 | extern crate idata;
[INFO] [stdout]     | ------------------- the item `idata` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/peg/mod.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::{self, result};
[INFO] [stdout]    |           ^^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/peg/mod.rs:338:6
[INFO] [stdout]     |
[INFO] [stdout] 338 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/peg/mod.rs:726:98
[INFO] [stdout]     |
[INFO] [stdout] 726 |         let (to, _) = idata::consume_char(chars).ok_or_else(|| error_peg_s("expected to char"))?;;
[INFO] [stdout]     |                                                                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Started` is never constructed
[INFO] [stdout]   --> src/parser/expression/mod.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub(crate) struct Started(usize);
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Started` is never constructed
[INFO] [stdout]   --> src/parser/expression/mod.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub(crate) struct Started(usize);
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "ae90efac7fecd6447885be779a90dc0b1c00ae06ec3bc22dec13f464d2b6655c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae90efac7fecd6447885be779a90dc0b1c00ae06ec3bc22dec13f464d2b6655c", kill_on_drop: false }`
[INFO] [stdout] ae90efac7fecd6447885be779a90dc0b1c00ae06ec3bc22dec13f464d2b6655c