[INFO] cloning repository https://github.com/rust-bootcamp-101/03-macros
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-bootcamp-101/03-macros" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-bootcamp-101%2F03-macros", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-bootcamp-101%2F03-macros'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cdaebb1e7b52a32ff4a88c8dff0bce7ebd50a2d2
[INFO] checking rust-bootcamp-101/03-macros against c60b92c03ca8a3b101eb9d57f51e2232690638c7 for pr-164148-crater-rollup
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-bootcamp-101%2F03-macros" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rust-bootcamp-101/03-macros
[INFO] finished tweaking git repo https://github.com/rust-bootcamp-101/03-macros
[INFO] tweaked toml for git repo https://github.com/rust-bootcamp-101/03-macros written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rust-bootcamp-101/03-macros on toolchain c60b92c03ca8a3b101eb9d57f51e2232690638c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rust-bootcamp-101/03-macros 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" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83
[INFO] running `Command { std: "docker" "start" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.82
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking ident_case v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]    Compiling anyhow v1.0.83
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking quote v1.0.36
[INFO] [stderr]     Checking syn v2.0.61
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking darling_core v0.20.8
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]    Compiling darling_macro v0.20.8
[INFO] [stderr]     Checking darling v0.20.8
[INFO] [stderr]    Compiling macros v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stdout] error[E0658]: use of unstable library feature `liballoc_internals`
[INFO] [stdout]   --> examples/my_vec.rs:30:32
[INFO] [stdout]    |
[INFO] [stdout]  7 |     let v = my_vec![1;4];
[INFO] [stdout]    |             ------------ in this macro invocation
[INFO] [stdout] ...
[INFO] [stdout] 26 | macro_rules! my_vec {
[INFO] [stdout] ...
[INFO] [stdout] 30 |     ($elem:expr; $n:expr) => { std::vec::from_elem($elem, $n) };
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: add `#![feature(liballoc_internals)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-10-11; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `macros` (example "my_vec") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83", kill_on_drop: false }`
[INFO] [stdout] 07d160b9cc0e9fb5ee125b0659cf23d6343236164aeb5fac652a3c0d797f1d83
