Cannot access a disposed object (DeflateStream) after recovering from malformed url #1802
Closed
Description
This is almost a duplicate of #1636 but about PowerPoint and with clear repro steps and a sample document.
Describe the bug
Unhandled exception. System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.IO.Compression.DeflateStream'.
at System.IO.Compression.DeflateStream.ReadCore(Span`1 buffer)
at System.IO.Packaging.ZipWrappingStream.Read(Span`1 buffer)
at System.IO.Stream.ReadAtLeastCore(Span`1 buffer, Int32 minimumBytes, Boolean throwOnEndOfStream)
at System.IO.Stream.ReadAtLeast(Span`1 buffer, Int32 minimumBytes, Boolean throwOnEndOfStream)
at System.Xml.XmlTextReaderImpl.InitStreamInput(Uri baseUri, String baseUriStr, Stream stream, Byte[] bytes, Int32 byteCount, Encoding encoding)
at System.Xml.XmlTextReaderImpl.FinishInitStream()
at System.Xml.XmlTextReaderImpl..ctor(Stream stream, Byte[] bytes, Int32 byteCount, XmlReaderSettings settings, Uri baseUri, String baseUriStr, XmlParserContext context, Boolean cl
oseInput)
at System.Xml.XmlReaderSettings.CreateReader(Stream input, Uri baseUri, String baseUriString, XmlParserContext inputContext)
at DocumentFormat.OpenXml.XmlConvertingReaderFactory.Create(Stream partStream, IOpenXmlNamespaceResolver resolver, XmlReaderSettings settings, Boolean strictRelationshipFound)
at DocumentFormat.OpenXml.OpenXmlPartRootElement.LoadFromPart(OpenXmlPart openXmlPart, Stream partStream)
at DocumentFormat.OpenXml.Packaging.OpenXmlPart.LoadDomTree[T]()
at DocumentFormat.OpenXml.Packaging.PresentationPart.get_Presentation()
at Program.<Main>$(String[] args) in /Users/Sergey_Tihon/git/oxml-malformedurl-url/Program.cs:line 7
To Reproduce
- clone repo - https://github.com/sergey-tihon/oxml-malformedurl-url
- execute
dotnet run
using DocumentFormat.OpenXml.Packaging;
using var fs = File.Open("repro.pptx", FileMode.Open, FileAccess.Read);
var openSettings = new OpenSettings { AutoSave = false };
using var doc = PresentationDocument.Open(fs, false, openSettings);
var presentation = doc.PresentationPart!.Presentation!;
var slideIds = presentation.SlideIdList?.ChildElements;
Console.WriteLine(slideIds?.Count ?? -1);<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<RootNamespace>oxml_malformedurl_url</RootNamespace>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="DocumentFormat.OpenXml" Version="3.1.0" />
</ItemGroup>
</Project>Observed behavior
Cannot access a disposed object.
Object name: 'System.IO.Compression.DeflateStream'.
Expected behavior
Fully functional recovered document.
Desktop (please complete the following information):
- OS: macOS v15
- .NET Target: 8.0.401
- DocumentFormat.OpenXml Version: 3.1.0
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