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Paint.NET 2.5 Beta 5 constantly crashing...


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Yeah, I can easily reproduce this. So this is a P1 bug that definitely blocks our release and will force us to put out a Release Candidate 2 in a day or two. Thanks though! It's important to find bugs like this. I'm currently looking in to it.

The Paint.NET Blog: https://blog.getpaint.net/

Donations are always appreciated! https://www.getpaint.net/donate.html

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Pffft, way to go me. It's a simple case of > vs. >= (greater than, vs. greater-than-or-equal-to). One character in the code fixes this.

Turns out our "large allocation threshold" is 65,536 bytes. The PNG you are pasting in those steps is 128 x 128, which is exactly 65,536 bytes (128 x 128 x 4 = 65536).

In our code we state, for our constant integer named largeBlockThreshold, "blocks this size or larger are allocated with AllocateLarge instead of Allocate". But then when we allocate we use AllocateLarge for blocks larger than but not equal to this value. Then when we free the memory, we do the comparison correctly. So we end up allocating with AllocateLarge and trying to free with Free instead of FreeLarge. Then Windows gets cranky and throws that "487" error code at us.

The Paint.NET Blog: https://blog.getpaint.net/

Donations are always appreciated! https://www.getpaint.net/donate.html

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