[INFO] fetching crate fcplug-callee 0.2.4...
[INFO] checking fcplug-callee-0.2.4 against 1.95.0 for pr-155915
[INFO] extracting crate fcplug-callee 0.2.4 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate fcplug-callee 0.2.4
[INFO] finished tweaking crates.io crate fcplug-callee 0.2.4
[INFO] tweaked toml for crates.io crate fcplug-callee 0.2.4 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fcplug-callee 0.2.4 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 122 packages to latest compatible versions
[INFO] [stderr]       Adding fcplug-build v0.2.4 (available: v0.4.5)
[INFO] [stderr]       Adding flatbuffers v23.5.26 (available: v25.12.19)
[INFO] [stderr]       Adding protobuf v2.28.0 (available: v3.7.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-appender v0.2.5
[INFO] [stderr]   Downloaded defer-lite v1.0.0
[INFO] [stderr]   Downloaded fcplug-build v0.2.4
[INFO] [stderr]   Downloaded fcplug-macros v0.2.4
[INFO] [stderr]   Downloaded flatc-rust v0.2.0
[INFO] [stderr]   Downloaded cbindgen v0.24.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b7bc55657410d9a4fe57a264889a22180035a9a436b7ec431864d0f5825aecb
[INFO] running `Command { std: "docker" "start" "-a" "2b7bc55657410d9a4fe57a264889a22180035a9a436b7ec431864d0f5825aecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b7bc55657410d9a4fe57a264889a22180035a9a436b7ec431864d0f5825aecb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b7bc55657410d9a4fe57a264889a22180035a9a436b7ec431864d0f5825aecb", kill_on_drop: false }`
[INFO] [stdout] 2b7bc55657410d9a4fe57a264889a22180035a9a436b7ec431864d0f5825aecb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4714b803cb24cf5bc5ae6fa53d036f64225d69c262cb8c8abdd076d2a2a44153
[INFO] running `Command { std: "docker" "start" "-a" "4714b803cb24cf5bc5ae6fa53d036f64225d69c262cb8c8abdd076d2a2a44153", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling os_str_bytes v6.6.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling protobuf v2.28.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.16.2
[INFO] [stderr]    Compiling cbindgen v0.24.5
[INFO] [stderr]    Compiling protoc v2.28.0
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling flatc-rust v0.2.0
[INFO] [stderr]    Compiling flatbuffers v23.5.26
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
[INFO] [stderr]     Checking time v0.3.47
[INFO] [stderr]     Checking symlink v0.1.0
[INFO] [stderr]    Compiling fcplug-macros v0.2.4
[INFO] [stderr]     Checking defer-lite v1.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/fcplug-macros-0.2.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fcplug-macros` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4714b803cb24cf5bc5ae6fa53d036f64225d69c262cb8c8abdd076d2a2a44153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4714b803cb24cf5bc5ae6fa53d036f64225d69c262cb8c8abdd076d2a2a44153", kill_on_drop: false }`
[INFO] [stdout] 4714b803cb24cf5bc5ae6fa53d036f64225d69c262cb8c8abdd076d2a2a44153