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ToHtml causes "access violation" #172

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opened 2026-01-29 14:29:26 +00:00 by claunia · 3 comments
claunia commented 2026-01-29 14:29:26 +00:00
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Originally created by @WernerMairl on GitHub (Dec 5, 2017).

Hi
I have a md file (attached) that causes a full stop (=catch not working, runtime stops execution) on dotnet core for a Stackoverflow/Access violation (tested with markdig 0.14.7)

The md file should be attached to this issue!
here the code snippet that i use to convert that file:

                var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
                string newName = System.IO.Path.ChangeExtension(file, ".html");
                bool append = false;
                    using (System.IO.TextWriter tw = new System.IO.StreamWriter(newName, append, System.Text.Encoding.UTF8))
                    {
                        Markdown.ToHtml(System.IO.File.ReadAllText(file), tw, pipeline);
                    }

expected behavior: working convert, OR if there is some problem inside the md a meaningful exception.

I hope the error can be reproduced immediately on your side

regards
Werner

dotnet --info
.NET Command Line Tools (2.1.1-preview-007165)

Product Information:
Version: 2.1.1-preview-007165
Commit SHA-1 hash: a4d1a8e0bb

Runtime Environment:
OS Name: Windows
OS Version: 10.0.14393
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\2.1.1-preview-007165\

Microsoft .NET Core Shared Framework Host

Version : 2.0.3

Build : a9190d4a75f4a982ae4b4fa8d1a24526566c69df

event_groupby_attendee.md.txt

Originally created by @WernerMairl on GitHub (Dec 5, 2017). Hi I have a md file (attached) that causes a full stop (=catch not working, runtime stops execution) on dotnet core for a Stackoverflow/Access violation (tested with markdig 0.14.7) The md file should be attached to this issue! here the code snippet that i use to convert that file: var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build(); string newName = System.IO.Path.ChangeExtension(file, ".html"); bool append = false; using (System.IO.TextWriter tw = new System.IO.StreamWriter(newName, append, System.Text.Encoding.UTF8)) { Markdown.ToHtml(System.IO.File.ReadAllText(file), tw, pipeline); } expected behavior: working convert, OR if there is some problem inside the md a meaningful exception. I hope the error can be reproduced immediately on your side regards Werner dotnet --info .NET Command Line Tools (2.1.1-preview-007165) Product Information: Version: 2.1.1-preview-007165 Commit SHA-1 hash: a4d1a8e0bb Runtime Environment: OS Name: Windows OS Version: 10.0.14393 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\2.1.1-preview-007165\ Microsoft .NET Core Shared Framework Host Version : 2.0.3 Build : a9190d4a75f4a982ae4b4fa8d1a24526566c69df [event_groupby_attendee.md.txt](https://github.com/lunet-io/markdig/files/1530073/event_groupby_attendee.md.txt)
claunia added the bug label 2026-01-29 14:29:26 +00:00
claunia commented 2026-01-29 14:29:27 +00:00
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@xoofx commented on GitHub (Dec 5, 2017):

In debug I got a StackOverflow error that should be fixed by commit bd4ea56 (0.14.8+)
Let me know if it is fixing your issue on your side.

@xoofx commented on GitHub (Dec 5, 2017): In debug I got a StackOverflow error that should be fixed by commit bd4ea56 (0.14.8+) Let me know if it is fixing your issue on your side.
claunia commented 2026-01-29 14:29:27 +00:00
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@WernerMairl commented on GitHub (Dec 5, 2017):

I can confirm that the exception is solved it works - THANK YOU!
Issue can be closed!

Feedback after executing the convert:

The execution is slow...
8(!) Seconds to convert this 236KB markdown into a 1600KB Html
Other markdowns with 70-80 KB are converted in a few milliseconds so i can only suggest to evaluate this usecase for performance tests....

@WernerMairl commented on GitHub (Dec 5, 2017): I can confirm that the exception is solved it works - THANK YOU! Issue can be closed! Feedback after executing the convert: The execution is slow... 8(!) Seconds to convert this 236KB markdown into a 1600KB Html Other markdowns with 70-80 KB are converted in a few milliseconds so i can only suggest to evaluate this usecase for performance tests....
claunia commented 2026-01-29 14:29:27 +00:00
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@xoofx commented on GitHub (Dec 5, 2017):

indeed, that's a pathological case with a pipe array of this size

@xoofx commented on GitHub (Dec 5, 2017): indeed, that's a pathological case with a pipe array of this size
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