[INFO] fetching crate regex-syntax 0.8.2...
[INFO] checking regex-syntax-0.8.2 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate regex-syntax 0.8.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate regex-syntax 0.8.2 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate regex-syntax 0.8.2
[INFO] finished tweaking crates.io crate regex-syntax 0.8.2
[INFO] tweaked toml for crates.io crate regex-syntax 0.8.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arbitrary v1.3.2
[INFO] [stderr]   Downloaded derive_arbitrary v1.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6d890dca51ec4201a708e6d53959836c2c58a950bc65d665605bc951f480f0f
[INFO] running `Command { std: "docker" "start" "-a" "b6d890dca51ec4201a708e6d53959836c2c58a950bc65d665605bc951f480f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6d890dca51ec4201a708e6d53959836c2c58a950bc65d665605bc951f480f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6d890dca51ec4201a708e6d53959836c2c58a950bc65d665605bc951f480f0f", kill_on_drop: false }`
[INFO] [stdout] b6d890dca51ec4201a708e6d53959836c2c58a950bc65d665605bc951f480f0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a929cf855cf9deb93c42b3d66e1cd8bfd37969eec6a2d2fc443a4dfd1c8287b7
[INFO] running `Command { std: "docker" "start" "-a" "a929cf855cf9deb93c42b3d66e1cd8bfd37969eec6a2d2fc443a4dfd1c8287b7", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ast` is imported redundantly
[INFO] [stdout]     --> src/ast/parse.rs:2408:22
[INFO] [stdout]      |
[INFO] [stdout] 2408 |     use crate::ast::{self, Ast, Position, Span};
[INFO] [stdout]      |                      ^^^^
[INFO] [stdout] 2409 |
[INFO] [stdout] 2410 |     use super::*;
[INFO] [stdout]      |         -------- the item `ast` is already imported here
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ast` is imported redundantly
[INFO] [stdout]     --> src/ast/parse.rs:2408:28
[INFO] [stdout]      |
[INFO] [stdout] 2408 |     use crate::ast::{self, Ast, Position, Span};
[INFO] [stdout]      |                            ^^^
[INFO] [stdout] 2409 |
[INFO] [stdout] 2410 |     use super::*;
[INFO] [stdout]      |         -------- the item `Ast` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Position` is imported redundantly
[INFO] [stdout]     --> src/ast/parse.rs:2408:33
[INFO] [stdout]      |
[INFO] [stdout] 2408 |     use crate::ast::{self, Ast, Position, Span};
[INFO] [stdout]      |                                 ^^^^^^^^
[INFO] [stdout] 2409 |
[INFO] [stdout] 2410 |     use super::*;
[INFO] [stdout]      |         -------- the item `Position` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Span` is imported redundantly
[INFO] [stdout]     --> src/ast/parse.rs:2408:43
[INFO] [stdout]      |
[INFO] [stdout] 2408 |     use crate::ast::{self, Ast, Position, Span};
[INFO] [stdout]      |                                           ^^^^
[INFO] [stdout] 2409 |
[INFO] [stdout] 2410 |     use super::*;
[INFO] [stdout]      |         -------- the item `Span` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ast` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1361:15
[INFO] [stdout]      |
[INFO] [stdout] 1361 |         ast::{self, parse::ParserBuilder, Ast, Position, Span},
[INFO] [stdout]      |               ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `ast` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ast` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1361:43
[INFO] [stdout]      |
[INFO] [stdout] 1361 |         ast::{self, parse::ParserBuilder, Ast, Position, Span},
[INFO] [stdout]      |                                           ^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `Ast` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Span` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1361:58
[INFO] [stdout]      |
[INFO] [stdout] 1361 |         ast::{self, parse::ParserBuilder, Ast, Position, Span},
[INFO] [stdout]      |                                                          ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `Span` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hir` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1362:15
[INFO] [stdout]      |
[INFO] [stdout] 1362 |         hir::{self, Hir, HirKind, Look, Properties},
[INFO] [stdout]      |               ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `hir` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hir` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1362:21
[INFO] [stdout]      |
[INFO] [stdout] 1362 |         hir::{self, Hir, HirKind, Look, Properties},
[INFO] [stdout]      |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `Hir` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HirKind` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1362:26
[INFO] [stdout]      |
[INFO] [stdout] 1362 |         hir::{self, Hir, HirKind, Look, Properties},
[INFO] [stdout]      |                          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `HirKind` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `unicode` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1363:19
[INFO] [stdout]      |
[INFO] [stdout] 1363 |         unicode::{self, ClassQuery},
[INFO] [stdout]      |                   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `unicode` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ClassQuery` is imported redundantly
[INFO] [stdout]     --> src/hir/translate.rs:1363:25
[INFO] [stdout]      |
[INFO] [stdout] 1363 |         unicode::{self, ClassQuery},
[INFO] [stdout]      |                         ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 1366 |     use super::*;
[INFO] [stdout]      |         -------- the item `ClassQuery` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `symmetric_difference` is never used
[INFO] [stdout]    --> src/hir/interval.rs:484:8
[INFO] [stdout]     |
[INFO] [stdout] 396 | pub trait Interval:
[INFO] [stdout]     |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 484 |     fn symmetric_difference(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `symmetric_difference` is never used
[INFO] [stdout]    --> src/hir/interval.rs:484:8
[INFO] [stdout]     |
[INFO] [stdout] 396 | pub trait Interval:
[INFO] [stdout]     |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 484 |     fn symmetric_difference(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.88s
[INFO] running `Command { std: "docker" "inspect" "a929cf855cf9deb93c42b3d66e1cd8bfd37969eec6a2d2fc443a4dfd1c8287b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a929cf855cf9deb93c42b3d66e1cd8bfd37969eec6a2d2fc443a4dfd1c8287b7", kill_on_drop: false }`
[INFO] [stdout] a929cf855cf9deb93c42b3d66e1cd8bfd37969eec6a2d2fc443a4dfd1c8287b7