[INFO] fetching crate ebnf 0.1.2...
[INFO] checking ebnf-0.1.2 against master#b04bfb4aea99436a62f6a98056e805eb9b0629cc for pr-98835
[INFO] extracting crate ebnf 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ebnf 0.1.2 on toolchain b04bfb4aea99436a62f6a98056e805eb9b0629cc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b04bfb4aea99436a62f6a98056e805eb9b0629cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ebnf 0.1.2
[INFO] finished tweaking crates.io crate ebnf 0.1.2
[INFO] tweaked toml for crates.io crate ebnf 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b04bfb4aea99436a62f6a98056e805eb9b0629cc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b04bfb4aea99436a62f6a98056e805eb9b0629cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded parse-hyperlinks v0.23.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+b04bfb4aea99436a62f6a98056e805eb9b0629cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4a4f5eed7b2e60d5dbd149e2b104ecc5ad130fdf7c219b3fa20154a20946582
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e4a4f5eed7b2e60d5dbd149e2b104ecc5ad130fdf7c219b3fa20154a20946582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4a4f5eed7b2e60d5dbd149e2b104ecc5ad130fdf7c219b3fa20154a20946582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a4f5eed7b2e60d5dbd149e2b104ecc5ad130fdf7c219b3fa20154a20946582", kill_on_drop: false }`
[INFO] [stdout] e4a4f5eed7b2e60d5dbd149e2b104ecc5ad130fdf7c219b3fa20154a20946582
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+b04bfb4aea99436a62f6a98056e805eb9b0629cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c34dd147ce066ee4978fec19699ecf4005a62a5fbe42e5b7a49f50c16d0f4e36
[INFO] running `Command { std: "docker" "start" "-a" "c34dd147ce066ee4978fec19699ecf4005a62a5fbe42e5b7a49f50c16d0f4e36", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking utf8-width v0.1.6
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking html-escape v0.2.11
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking parse-hyperlinks v0.23.3
[INFO] [stderr]     Checking ebnf v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Grammar`
[INFO] [stdout]   --> src/parser.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Expression, Grammar, Node,
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/parser.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         Ok(((s, regex_ext_kind))) => {
[INFO] [stdout]    |            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 88 -         Ok(((s, regex_ext_kind))) => {
[INFO] [stdout] 88 +         Ok((s, regex_ext_kind)) => {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Grammar`
[INFO] [stdout]   --> src/parser.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Expression, Grammar, Node,
[INFO] [stdout]    |                 ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/parser.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         Ok(((s, regex_ext_kind))) => {
[INFO] [stdout]    |            ^                   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 88 -         Ok(((s, regex_ext_kind))) => {
[INFO] [stdout] 88 +         Ok((s, regex_ext_kind)) => {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/parser.rs:221:14
[INFO] [stdout]     |
[INFO] [stdout] 221 |         let (input, vec) = parse_expressions(src).unwrap();
[INFO] [stdout]     |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.73s
[INFO] running `Command { std: "docker" "inspect" "c34dd147ce066ee4978fec19699ecf4005a62a5fbe42e5b7a49f50c16d0f4e36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c34dd147ce066ee4978fec19699ecf4005a62a5fbe42e5b7a49f50c16d0f4e36", kill_on_drop: false }`
[INFO] [stdout] c34dd147ce066ee4978fec19699ecf4005a62a5fbe42e5b7a49f50c16d0f4e36