Function patch_seq_env_get 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_env_get(
    env_data: *const Value,
    env_len: usize,
    index: i32,
) -> Value

Get a value from the closure environment

Called from generated closure function code to access captured values. Takes environment as separate data pointer and length (since LLVM can’t handle fat pointers).

Safety

• env_data must be a valid pointer to an array of Values
• env_len must match the actual array length
• index must be in bounds [0, env_len)