[INFO] fetching crate grammar_tool 0.1.0...
[INFO] checking grammar_tool-0.1.0 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate grammar_tool 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate grammar_tool 0.1.0
[INFO] finished tweaking crates.io crate grammar_tool 0.1.0
[INFO] tweaked toml for crates.io crate grammar_tool 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate grammar_tool 0.1.0 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate grammar_tool 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lalrpop-util v0.17.2
[INFO] [stderr]   Downloaded string_cache_shared v0.3.0
[INFO] [stderr]   Downloaded serde_derive v1.0.103
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[INFO] [stderr]   Downloaded ena v0.13.1
[INFO] [stderr]   Downloaded diff v0.1.11
[INFO] [stderr]   Downloaded docopt v1.1.0
[INFO] [stderr]   Downloaded serde v1.0.103
[INFO] [stderr]   Downloaded string_cache v0.7.5
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.3
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded lalrpop v0.17.2
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6603ae9d56a44ae5b6f0d35ab0ec5202d1dab1945e502874f596b792276b996
[INFO] running `Command { std: "docker" "start" "-a" "a6603ae9d56a44ae5b6f0d35ab0ec5202d1dab1945e502874f596b792276b996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6603ae9d56a44ae5b6f0d35ab0ec5202d1dab1945e502874f596b792276b996", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6603ae9d56a44ae5b6f0d35ab0ec5202d1dab1945e502874f596b792276b996", kill_on_drop: false }`
[INFO] [stdout] a6603ae9d56a44ae5b6f0d35ab0ec5202d1dab1945e502874f596b792276b996
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94d95279b6478a77578221c54d7012cd8bffdfb4324d04f105dc50f8df8666e3
[INFO] running `Command { std: "docker" "start" "-a" "94d95279b6478a77578221c54d7012cd8bffdfb4324d04f105dc50f8df8666e3", kill_on_drop: false }`
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[INFO] [stderr]    Compiling grammar_tool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `declared_terminals` is never read
[INFO] [stdout]   --> src/grammar.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Grammar {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 19 |     pub start: String,
[INFO] [stdout] 20 |     pub declared_terminals: HashSet<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Grammar` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `declared_terminals` is never read
[INFO] [stdout]   --> src/grammar.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Grammar {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 19 |     pub start: String,
[INFO] [stdout] 20 |     pub declared_terminals: HashSet<String>,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Grammar` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 47.29s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: lalrpop v0.17.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "94d95279b6478a77578221c54d7012cd8bffdfb4324d04f105dc50f8df8666e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94d95279b6478a77578221c54d7012cd8bffdfb4324d04f105dc50f8df8666e3", kill_on_drop: false }`
[INFO] [stdout] 94d95279b6478a77578221c54d7012cd8bffdfb4324d04f105dc50f8df8666e3