TarFile.ExtractToDirectory() doesn't work sometimes with compressed archives #74242
Description
Description
TarFile.ExtractToDirectoryInternal() doesn't work with some compressed archives.
The method works in examples from tests of the repo.
But it doesn't work if I try an archive created with 7-Zip or official PowerShell distributive (link is below).
If I try TarReader on the same archives I can read all entries.
Also the method works well if an archive is not compressed.
Small example archives created with 7-Zip
examples.zip
Reproduction Steps
- Download https://github.com/PowerShell/PowerShell/releases/download/v7.3.0-preview.6/powershell-7.3.0-preview.6-linux-x64.tar.gz
- Try read with simple code:
using (var sourceStream = File.OpenRead(args[0]))
using (var decompressorStream = new GZipStream(sourceStream, CompressionMode.Decompress))
{
TarFile.ExtractToDirectory(decompressorStream, args[1], true);
}Expected behavior
The archive is unpacked well.
Actual behavior
Exception throws:
Unhandled exception. System.FormatException: Could not find any recognizable digits. at System.ParseNumbers.StringToInt(ReadOnlySpan`1 s, Int32 radix, Int32 flags, Int32& currPos) at System.Convert.ToInt32(String value, Int32 fromBase) at System.Formats.Tar.TarHelpers.GetTenBaseNumberFromOctalAsciiChars(Span`1 buffer) at System.Formats.Tar.TarHeader.TryReadCommonAttributes(Span`1 buffer) at System.Formats.Tar.TarHeader.TryGetNextHeader(Stream archiveStream, Boolean copyData) at System.Formats.Tar.TarReader.TryGetNextEntryHeader(TarHeader& header, Boolean copyData) at System.Formats.Tar.TarReader.GetNextEntry(Boolean copyData) at System.Formats.Tar.TarFile.ExtractToDirectoryInternal(Stream source, String destinationDirectoryPath, Boolean overwriteFiles, Boolean leaveOpen)
Regression?
No response
Known Workarounds
No response
Configuration
.Net Preview.7
Other information
No response