Several inputs causing NConvert crash

[zaoyang]

Hi, I found several inputs that cause crashes in NConvert (v7.221) on x86-64 Ubuntu 22.04.

The attached zip contains the input files that trigger the crashes, along with the corresponding error types and backtraces.

nconvert.zip

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Some crashes are not triggered when running NConvert directly, but are triggered when running it under QEMU-ASAN(https://github.com/andreafioraldi/qasan).

Let me know if you need more information!