[INFO] fetching crate parcos 0.0.5...
[INFO] testing parcos-0.0.5 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate parcos 0.0.5 into /workspace/builds/worker-4-tc2/source
[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-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate parcos 0.0.5 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18ef64effc10a3807bbf6e206a26cd4d7c3d0e7ecf1f2a0daee03881c83de61b
[INFO] running `Command { std: "docker" "start" "-a" "18ef64effc10a3807bbf6e206a26cd4d7c3d0e7ecf1f2a0daee03881c83de61b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18ef64effc10a3807bbf6e206a26cd4d7c3d0e7ecf1f2a0daee03881c83de61b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18ef64effc10a3807bbf6e206a26cd4d7c3d0e7ecf1f2a0daee03881c83de61b", kill_on_drop: false }`
[INFO] [stdout] 18ef64effc10a3807bbf6e206a26cd4d7c3d0e7ecf1f2a0daee03881c83de61b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68722744fecffbdc0c5b79ccd4fe0e70cd1a090557bdccd03cb5b41e0bba4026
[INFO] running `Command { std: "docker" "start" "-a" "68722744fecffbdc0c5b79ccd4fe0e70cd1a090557bdccd03cb5b41e0bba4026", kill_on_drop: false }`
[INFO] [stderr]    Compiling parcos v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "68722744fecffbdc0c5b79ccd4fe0e70cd1a090557bdccd03cb5b41e0bba4026", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68722744fecffbdc0c5b79ccd4fe0e70cd1a090557bdccd03cb5b41e0bba4026", kill_on_drop: false }`
[INFO] [stdout] 68722744fecffbdc0c5b79ccd4fe0e70cd1a090557bdccd03cb5b41e0bba4026
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e2b1ace2d21ac8e1b9cad5ad9eeb362ebc8937c4777a776f5696d0550dd58e7
[INFO] running `Command { std: "docker" "start" "-a" "0e2b1ace2d21ac8e1b9cad5ad9eeb362ebc8937c4777a776f5696d0550dd58e7", 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)]` (part of `#[warn(unused)]`) 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 0.43s
[INFO] running `Command { std: "docker" "inspect" "0e2b1ace2d21ac8e1b9cad5ad9eeb362ebc8937c4777a776f5696d0550dd58e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e2b1ace2d21ac8e1b9cad5ad9eeb362ebc8937c4777a776f5696d0550dd58e7", kill_on_drop: false }`
[INFO] [stdout] 0e2b1ace2d21ac8e1b9cad5ad9eeb362ebc8937c4777a776f5696d0550dd58e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 09473bb1228cd77b0716345b9c044a65578026358a162594944a98a879276f4e
[INFO] running `Command { std: "docker" "start" "-a" "09473bb1228cd77b0716345b9c044a65578026358a162594944a98a879276f4e", kill_on_drop: false }`
[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)]` (part of `#[warn(unused)]`) 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 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/parcos-4fcff75a62cb753f)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::test_or_parser ... ok
[INFO] [stdout] test tests::test_map_parser ... ok
[INFO] [stdout] test tests::test_just_parser ... ok
[INFO] [stdout] test tests::test_repeat_parser ... ok
[INFO] [stdout] test tests::test_just_parser_failure ... ok
[INFO] [stdout] test tests::test_to_parser ... ok
[INFO] [stdout] test tests::test_pred_parser ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests parcos
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/combinators/just.rs - combinators::just::just (line 34) ... 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::to (line 49) ... 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] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.23s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "09473bb1228cd77b0716345b9c044a65578026358a162594944a98a879276f4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09473bb1228cd77b0716345b9c044a65578026358a162594944a98a879276f4e", kill_on_drop: false }`
[INFO] [stdout] 09473bb1228cd77b0716345b9c044a65578026358a162594944a98a879276f4e