[INFO] fetching crate structural 0.4.3...
[INFO] testing structural-0.4.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate structural 0.4.3 into /workspace/builds/worker-102/source
[INFO] validating manifest of crates.io crate structural 0.4.3 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 structural 0.4.3
[INFO] finished tweaking crates.io crate structural 0.4.3
[INFO] tweaked toml for crates.io crate structural 0.4.3 written to /workspace/builds/worker-102/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] b242262084931e9f41543e1b92acc47a67aa4045cd69ba37630a3417351ceda7
[INFO] running `Command { std: "docker" "start" "-a" "b242262084931e9f41543e1b92acc47a67aa4045cd69ba37630a3417351ceda7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b242262084931e9f41543e1b92acc47a67aa4045cd69ba37630a3417351ceda7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b242262084931e9f41543e1b92acc47a67aa4045cd69ba37630a3417351ceda7", kill_on_drop: false }`
[INFO] [stdout] b242262084931e9f41543e1b92acc47a67aa4045cd69ba37630a3417351ceda7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] 8fa35ab52270ad0dfef43e7fb5aa17d3a4d210917231e381c805025ce8700bb9
[INFO] running `Command { std: "docker" "start" "-a" "8fa35ab52270ad0dfef43e7fb5aa17d3a4d210917231e381c805025ce8700bb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling typed-arena v1.5.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling core_extensions v0.1.20
[INFO] [stderr]    Compiling as_derive_utils v0.8.3
[INFO] [stderr]    Compiling structural_derive v0.4.3
[INFO] [stderr]    Compiling structural v0.4.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.85s
[INFO] running `Command { std: "docker" "inspect" "8fa35ab52270ad0dfef43e7fb5aa17d3a4d210917231e381c805025ce8700bb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fa35ab52270ad0dfef43e7fb5aa17d3a4d210917231e381c805025ce8700bb9", kill_on_drop: false }`
[INFO] [stdout] 8fa35ab52270ad0dfef43e7fb5aa17d3a4d210917231e381c805025ce8700bb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] 5ae131738739e1dc9d9f044ecd5a92a9536c7377b27825a64240388d54bf8440
[INFO] running `Command { std: "docker" "start" "-a" "5ae131738739e1dc9d9f044ecd5a92a9536c7377b27825a64240388d54bf8440", kill_on_drop: false }`
[INFO] [stderr]    Compiling structural v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: tests must be run with the "testing" feature
[INFO] [stdout]    --> src/lib.rs:788:1
[INFO] [stdout]     |
[INFO] [stdout] 788 | compile_error! { "tests must be run with the \"testing\" feature" }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crate::test_utils`
[INFO] [stdout]    --> src/field/array_impls.rs:323:24
[INFO] [stdout]     |
[INFO] [stdout] 323 |             use crate::test_utils::DecOnDrop;
[INFO] [stdout]     |                        ^^^^^^^^^^ could not find `test_utils` in the crate root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `structural` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "5ae131738739e1dc9d9f044ecd5a92a9536c7377b27825a64240388d54bf8440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ae131738739e1dc9d9f044ecd5a92a9536c7377b27825a64240388d54bf8440", kill_on_drop: false }`
[INFO] [stdout] 5ae131738739e1dc9d9f044ecd5a92a9536c7377b27825a64240388d54bf8440