deinit

pub fn deinit(bc: *BitcodeReader) void {
    var block_info_it = bc.block_info.valueIterator();
    while (block_info_it.next()) |block_info| block_info.deinit(bc.allocator);
    bc.block_info.deinit(bc.allocator);
    for (bc.stack.items) |*state| state.deinit(bc.allocator);
    bc.stack.deinit(bc.allocator);
    bc.record_arena.promote(bc.allocator).deinit();
    bc.* = undefined;
}