mapleFU commented on PR #15241:
URL: https://github.com/apache/arrow/pull/15241#issuecomment-1384453602
```c++
} else {
++mini_block_idx_;
if (mini_block_idx_ < mini_blocks_per_block_) {
InitMiniBlock(delta_bit_widths_->data()[mini_block_idx_]);
} else {
InitBlock();
}
}
```
Previously, `bit_width_` will point to a "bad" width, but it will never been
read. Now, `InitMiniBlock` will read it
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