[INFO] fetching crate pom 3.2.0...
[INFO] testing pom-3.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate pom 3.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate pom 3.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pom 3.2.0
[INFO] finished tweaking crates.io crate pom 3.2.0
[INFO] tweaked toml for crates.io crate pom 3.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate pom 3.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f25a888139b7bb15311e6a4ad28b641e9c6a0ba792fa70bdaa8664af04da9aa6
[INFO] running `Command { std: "docker" "start" "-a" "f25a888139b7bb15311e6a4ad28b641e9c6a0ba792fa70bdaa8664af04da9aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f25a888139b7bb15311e6a4ad28b641e9c6a0ba792fa70bdaa8664af04da9aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f25a888139b7bb15311e6a4ad28b641e9c6a0ba792fa70bdaa8664af04da9aa6", kill_on_drop: false }`
[INFO] [stdout] f25a888139b7bb15311e6a4ad28b641e9c6a0ba792fa70bdaa8664af04da9aa6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e373d8f76a98bca3395e80054157ea6544450cd408d4f00107e1e823cd47193e
[INFO] running `Command { std: "docker" "start" "-a" "e373d8f76a98bca3395e80054157ea6544450cd408d4f00107e1e823cd47193e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pom v3.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "e373d8f76a98bca3395e80054157ea6544450cd408d4f00107e1e823cd47193e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e373d8f76a98bca3395e80054157ea6544450cd408d4f00107e1e823cd47193e", kill_on_drop: false }`
[INFO] [stdout] e373d8f76a98bca3395e80054157ea6544450cd408d4f00107e1e823cd47193e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61deff84354f807110112ecc975944f358f444a1938723ef5510e7f25a16b418
[INFO] running `Command { std: "docker" "start" "-a" "61deff84354f807110112ecc975944f358f444a1938723ef5510e7f25a16b418", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling pom v3.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> examples/whitespace.rs:77:2
[INFO] [stdout]    |
[INFO] [stdout] 77 | /     (
[INFO] [stdout] 78 | |         whitespace() *
[INFO] [stdout] 79 | |         list(
[INFO] [stdout] 80 | |             call(container),
[INFO] [stdout] 81 | |             whitespace()
[INFO] [stdout] 82 | |         )
[INFO] [stdout] 83 | |     )
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 |     whitespace() *
[INFO] [stdout] 78 |         list(
[INFO] [stdout] 79 |             call(container),
[INFO] [stdout] 80 |             whitespace()
[INFO] [stdout] 81 |         )
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/json_file.rs:75:2
[INFO] [stdout]    |
[INFO] [stdout] 75 |     file.read_to_end(&mut input);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.39s
[INFO] running `Command { std: "docker" "inspect" "61deff84354f807110112ecc975944f358f444a1938723ef5510e7f25a16b418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61deff84354f807110112ecc975944f358f444a1938723ef5510e7f25a16b418", kill_on_drop: false }`
[INFO] [stdout] 61deff84354f807110112ecc975944f358f444a1938723ef5510e7f25a16b418
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1dd9f3a29d056c2f68057452edf13e698dacb8803f00dd2b715a957523be98aa
[INFO] running `Command { std: "docker" "start" "-a" "1dd9f3a29d056c2f68057452edf13e698dacb8803f00dd2b715a957523be98aa", kill_on_drop: false }`
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> examples/json_file.rs:75:2
[INFO] [stderr]    |
[INFO] [stderr] 75 |     file.read_to_end(&mut input);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `pom` (example "json_file") generated 1 warning
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stdout] running 7 tests
[INFO] [stderr]   --> examples/whitespace.rs:77:2
[INFO] [stdout] test parser::tests::byte_works ... ok
[INFO] [stderr]    |
[INFO] [stdout] test parser::tests::chain_parser ... ok
[INFO] [stderr] 77 | /     (
[INFO] [stdout] test parser::tests::char_works ... ok
[INFO] [stderr] 78 | |         whitespace() *
[INFO] [stdout] test parser::tests::recursive_parser ... ok
[INFO] [stderr] 79 | |         list(
[INFO] [stdout] test parser::tests::repeat_at_least ... ok
[INFO] [stderr] 80 | |             call(container),
[INFO] [stdout] test parser::tests::repeat_exactly ... ok
[INFO] [stderr] 81 | |             whitespace()
[INFO] [stdout] test parser::tests::repeat_up_to ... ok
[INFO] [stderr] 82 | |         )
[INFO] [stdout] 
[INFO] [stderr] 83 | |     )
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    | |_____^
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 77 |     whitespace() *
[INFO] [stderr] 78 |         list(
[INFO] [stderr] 79 |             call(container),
[INFO] [stderr] 80 |             whitespace()
[INFO] [stderr] 81 |         )
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `pom` (example "whitespace") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pom-e4906ed7ad7129d2)
[INFO] [stderr]      Running tests/list.rs (/opt/rustwide/target/debug/deps/list-c746279482e62994)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_list ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests pom
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1dd9f3a29d056c2f68057452edf13e698dacb8803f00dd2b715a957523be98aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dd9f3a29d056c2f68057452edf13e698dacb8803f00dd2b715a957523be98aa", kill_on_drop: false }`
[INFO] [stdout] 1dd9f3a29d056c2f68057452edf13e698dacb8803f00dd2b715a957523be98aa