[INFO] fetching crate parcos 0.0.5...
[INFO] testing parcos-0.0.5 against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940-2
[INFO] extracting crate parcos 0.0.5 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate parcos 0.0.5 on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate parcos 0.0.5
[INFO] finished tweaking crates.io crate parcos 0.0.5
[INFO] tweaked toml for crates.io crate parcos 0.0.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate parcos 0.0.5 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" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91a349c50f4c37ec767c7d34316e1d4965dd368e6eec34c593622688334b8a78
[INFO] running `Command { std: "docker" "start" "-a" "91a349c50f4c37ec767c7d34316e1d4965dd368e6eec34c593622688334b8a78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91a349c50f4c37ec767c7d34316e1d4965dd368e6eec34c593622688334b8a78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a349c50f4c37ec767c7d34316e1d4965dd368e6eec34c593622688334b8a78", kill_on_drop: false }`
[INFO] [stdout] 91a349c50f4c37ec767c7d34316e1d4965dd368e6eec34c593622688334b8a78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e93ec1c27490e3ef6cff4c61620663eec456aafc77c1504bb65be5192c8426d7
[INFO] running `Command { std: "docker" "start" "-a" "e93ec1c27490e3ef6cff4c61620663eec456aafc77c1504bb65be5192c8426d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling parcos v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "e93ec1c27490e3ef6cff4c61620663eec456aafc77c1504bb65be5192c8426d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e93ec1c27490e3ef6cff4c61620663eec456aafc77c1504bb65be5192c8426d7", kill_on_drop: false }`
[INFO] [stdout] e93ec1c27490e3ef6cff4c61620663eec456aafc77c1504bb65be5192c8426d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e612a11c185054ff918192834ec833e4ff3c063357f162fd5240f4c34bfca2d
[INFO] running `Command { std: "docker" "start" "-a" "1e612a11c185054ff918192834ec833e4ff3c063357f162fd5240f4c34bfca2d", kill_on_drop: false }`
[INFO] [stderr]    Compiling parcos v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> examples/arithmetic_operator.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Number(u32),
[INFO] [stdout]   |     ------ ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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] 8 -     Number(u32),
[INFO] [stdout] 8 +     Number(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "1e612a11c185054ff918192834ec833e4ff3c063357f162fd5240f4c34bfca2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e612a11c185054ff918192834ec833e4ff3c063357f162fd5240f4c34bfca2d", kill_on_drop: false }`
[INFO] [stdout] 1e612a11c185054ff918192834ec833e4ff3c063357f162fd5240f4c34bfca2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 90bd4202070df5a91a2101c790e5538686971341ad3742905552b29ac8a164ff
[INFO] running `Command { std: "docker" "start" "-a" "90bd4202070df5a91a2101c790e5538686971341ad3742905552b29ac8a164ff", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> examples/arithmetic_operator.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |     Number(u32),
[INFO] [stderr]   |     ------ ^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Node` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 8 -     Number(u32),
[INFO] [stderr] 8 +     Number(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: `parcos` (example "arithmetic_operator") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/parcos-4fcff75a62cb753f)
[INFO] [stdout] test tests::test_just_parser_failure ... ok
[INFO] [stdout] test tests::test_just_parser ... ok
[INFO] [stderr]    Doc-tests parcos
[INFO] [stdout] test tests::test_repeat_parser ... ok
[INFO] [stdout] test tests::test_to_parser ... ok
[INFO] [stdout] test tests::test_pred_parser ... ok
[INFO] [stdout] test tests::test_or_parser ... ok
[INFO] [stdout] test tests::test_map_parser ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/parser.rs - parser::Parser::to (line 49) ... ok
[INFO] [stdout] test src/combinators/pred.rs - combinators::pred::pred (line 27) ... ok
[INFO] [stdout] test src/parser.rs - parser::Parser::repeat (line 102) ... ok
[INFO] [stdout] test src/parser.rs - parser::Parser::map (line 85) ... ok
[INFO] [stdout] test src/parser.rs - parser::Parser::or (line 66) ... ok
[INFO] [stdout] test src/combinators/just.rs - combinators::just::just (line 34) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.98s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "90bd4202070df5a91a2101c790e5538686971341ad3742905552b29ac8a164ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90bd4202070df5a91a2101c790e5538686971341ad3742905552b29ac8a164ff", kill_on_drop: false }`
[INFO] [stdout] 90bd4202070df5a91a2101c790e5538686971341ad3742905552b29ac8a164ff