[INFO] fetching crate scrings 0.1.7...
[INFO] testing scrings-0.1.7 against 1.91.0 for beta-1.92-2
[INFO] extracting crate scrings 0.1.7 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate scrings 0.1.7
[INFO] finished tweaking crates.io crate scrings 0.1.7
[INFO] tweaked toml for crates.io crate scrings 0.1.7 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate scrings 0.1.7 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate scrings 0.1.7 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tree-sitter-language v0.1.4
[INFO] [stderr]   Downloaded tree-sitter-traversal2 v0.2.0
[INFO] [stderr]   Downloaded tree-sitter-javascript v0.23.1
[INFO] [stderr]   Downloaded tree-sitter-python v0.21.0
[INFO] [stderr]   Downloaded tree-sitter v0.24.7
[INFO] [stderr]   Downloaded tree-sitter-powershell v0.24.5
[INFO] [stderr]   Downloaded tree-sitter-php v0.23.11
[INFO] [stderr]   Downloaded tree-sitter-bash v0.21.0
[INFO] [stderr]   Downloaded tree-sitter-sequel v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbe4efd8e2da62a98fa5b0cb7416ebcb57d70405c0edbb5a6b0b4012eb17302c
[INFO] running `Command { std: "docker" "start" "-a" "bbe4efd8e2da62a98fa5b0cb7416ebcb57d70405c0edbb5a6b0b4012eb17302c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbe4efd8e2da62a98fa5b0cb7416ebcb57d70405c0edbb5a6b0b4012eb17302c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbe4efd8e2da62a98fa5b0cb7416ebcb57d70405c0edbb5a6b0b4012eb17302c", kill_on_drop: false }`
[INFO] [stdout] bbe4efd8e2da62a98fa5b0cb7416ebcb57d70405c0edbb5a6b0b4012eb17302c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23cfecf3c9a7cbf7a46120f26e728ea2b671a611931f572ef933a8235e3f047a
[INFO] running `Command { std: "docker" "start" "-a" "23cfecf3c9a7cbf7a46120f26e728ea2b671a611931f572ef933a8235e3f047a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.2.12
[INFO] [stderr]    Compiling tree-sitter-language v0.1.4
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling streaming-iterator v0.1.9
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling encode_unicode v1.0.0
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling tree-sitter v0.24.7
[INFO] [stderr]    Compiling tree-sitter-sequel v0.3.7
[INFO] [stderr]    Compiling tree-sitter-bash v0.21.0
[INFO] [stderr]    Compiling tree-sitter-javascript v0.23.1
[INFO] [stderr]    Compiling tree-sitter-powershell v0.24.5
[INFO] [stderr]    Compiling tree-sitter-python v0.21.0
[INFO] [stderr]    Compiling tree-sitter-php v0.23.11
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling tree-sitter-traversal2 v0.2.0
[INFO] [stderr]    Compiling scrings v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(macro_metavar_expr)]
[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 `scrings` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "23cfecf3c9a7cbf7a46120f26e728ea2b671a611931f572ef933a8235e3f047a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23cfecf3c9a7cbf7a46120f26e728ea2b671a611931f572ef933a8235e3f047a", kill_on_drop: false }`
[INFO] [stdout] 23cfecf3c9a7cbf7a46120f26e728ea2b671a611931f572ef933a8235e3f047a