[INFO] fetching crate syn-serde 0.3.2...
[INFO] testing syn-serde-0.3.2 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate syn-serde 0.3.2 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate syn-serde 0.3.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate syn-serde 0.3.2
[INFO] tweaked toml for crates.io crate syn-serde 0.3.2 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate syn-serde 0.3.2 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate syn-serde 0.3.2 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 61371f979fe2d940725201b02d9eb24faec1b24aa0873a147e63fb02c4b82281
[INFO] running `Command { std: "docker" "start" "-a" "61371f979fe2d940725201b02d9eb24faec1b24aa0873a147e63fb02c4b82281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61371f979fe2d940725201b02d9eb24faec1b24aa0873a147e63fb02c4b82281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61371f979fe2d940725201b02d9eb24faec1b24aa0873a147e63fb02c4b82281", kill_on_drop: false }`
[INFO] [stdout] 61371f979fe2d940725201b02d9eb24faec1b24aa0873a147e63fb02c4b82281
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 003cf0893df767d14563e52bd42cd92811377487f293a910dc23b7b68e6acecb
[INFO] running `Command { std: "docker" "start" "-a" "003cf0893df767d14563e52bd42cd92811377487f293a910dc23b7b68e6acecb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling syn-serde v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.96s
[INFO] running `Command { std: "docker" "inspect" "003cf0893df767d14563e52bd42cd92811377487f293a910dc23b7b68e6acecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "003cf0893df767d14563e52bd42cd92811377487f293a910dc23b7b68e6acecb", kill_on_drop: false }`
[INFO] [stdout] 003cf0893df767d14563e52bd42cd92811377487f293a910dc23b7b68e6acecb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9139e400f9aa8c43a39d3ac5d495319430c21f89a33ecbcb2911727159774e1
[INFO] running `Command { std: "docker" "start" "-a" "f9139e400f9aa8c43a39d3ac5d495319430c21f89a33ecbcb2911727159774e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling itoa v1.0.17
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling syn-serde v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: cannot find `json` in `syn_serde`
[INFO] [stdout]    --> tests/test_item.rs:8:47
[INFO] [stdout]     |
[INFO] [stdout]   8 |     println!("actual:\n```\n{}\n", syn_serde::json::to_string_pretty(actual));
[INFO] [stdout]     |                                               ^^^^ could not find `json` in `syn_serde`
[INFO] [stdout]     |
[INFO] [stdout] note: found an item that was configured out
[INFO] [stdout]    --> src/lib.rs:272:9
[INFO] [stdout]     |
[INFO] [stdout] 271 | #[cfg(feature = "json")]
[INFO] [stdout]     |       ---------------- the item is gated behind the `json` feature
[INFO] [stdout] 272 | pub mod json;
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn-serde` (test "test_item") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f9139e400f9aa8c43a39d3ac5d495319430c21f89a33ecbcb2911727159774e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9139e400f9aa8c43a39d3ac5d495319430c21f89a33ecbcb2911727159774e1", kill_on_drop: false }`
[INFO] [stdout] f9139e400f9aa8c43a39d3ac5d495319430c21f89a33ecbcb2911727159774e1