build union failed

[bestgopher]

When I built the repo, I got an error.

build env

cargo version -v

cargo 1.70.0 (ec8a8a0ca 2023-04-25)
release: 1.70.0
commit-hash: ec8a8a0cabb0e0cadef58902470f6c7ee7868bdc
commit-date: 2023-04-25
host: aarch64-unknown-linux-gnu
libgit2: 1.6.3 (sys:0.17.0 vendored)
libcurl: 8.0.1-DEV (sys:0.4.61+curl-8.0.1 vendored ssl:OpenSSL/1.1.1t)
os: Ubuntu 23.04 (lunar) [64-bit]

Input C/C++ Header

struct btf_dump_opts {
        union {
                size_t sz;
                void *ctx; /* DEPRECATED: will be gone in v1.0 */
        };
};

Bindgen Invocation

 let bindings = bindgen::Builder::default()
        .header("bindings.h")
        .clang_arg("-Ilibbpf/src")
        .clang_arg("-Ilibbpf/include/uapi")
        .clang_arg("-Ilibbpf/include")
        .allowlist_function("btf_dump__new")
        .allowlist_function("vdprintf")
        .generate()
        .expect("Unable to generate bindings");
    bindings
        .write_to_file(out_path.join("libbpf_bindings.rs"))
        .expect("Couldn't write bindings!");

Actual Results

 thread 'main' panicked at '"btf_dump_opts_union_(anonymous_at_libbpf/src/btf_h_271_2)" is not a valid Ident', /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.63/src/fallback.rs:791:9

Expected Results

[emilio]

You need to update bindgen, that has been fixed upstream, see #2488.