App crash ucrtbase.dll when using TesseractEngine

[Norc89]

Hi, In step where i'm using TesseartEngine i get random crash from TesseractEngine. When this crash happen none try/catch/handling can help also the Visual studio just stop debugging. Crash i get when reading from page.

                var text = page.GetText();
                readedText.AppendLine(text);
                using (var iter = page.GetIterator())
                {
                    iter.Begin();
                    do
                    {
                        do
                        {
                            do
                            {
                                do
                                {  
                                    readedText.AppendLine(iter.GetText(PageIteratorLevel.Word));                                    
                                } while (iter.Next(PageIteratorLevel.TextLine, PageIteratorLevel.Word));
                            } while (iter.Next(PageIteratorLevel.Para, PageIteratorLevel.TextLine));
                        } while (iter.Next(PageIteratorLevel.Block, PageIteratorLevel.Para));
                    } while (iter.Next(PageIteratorLevel.Block));
                }

to_blocks->singleton():Error:Assert failed:in file C:\Users\charl\Development\tesseract-native\tesseract\src\ccmain\pagesegmain.cpp, line 305

Faulting module name: ucrtbase.dll, version: 10.0.17763.719, time stamp: 0xa18cd287 Exception code: 0xc0000409 Fault offset: 0x000a522b

[tdhintz]

Does your OS have AVX2 enabled? I'm not familiar with that specific symptom but some versions crash if they don't have AVX2 instructions available. 5.0 and newer does not have that problem.

[charlesw]

AVX2 instructions shouldn't be a problem in the latest/released version as library has been compiled with them disabled. I'd also expect it to reliably crash, i.e. whenever it executed that instruction.

What version of .net are you targeting?

On Wed, 31 Mar 2021, 22:04 Hintz, @.***> wrote:

Does your OS have AVX2 enabled? I'm not familiar with that specific symptom but some versions crash if they don't have AVX2 instructions available. 5.0 and newer does not have that problem.

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[tdhintz]

I can't speak to this specific build, but normally AVX2 detection at run-time is dynamic.