weltkante/managed-lzma

Decoding Exception

Opened this issue · 4 comments

Zetanova commented

An archive was created with 7-zip.exe 9.20 and 18.01
with pw and multiple files.

A NotSupportedException is thrown on the first file stream:
at ManagedLzma.SevenZip.Reader.BcjArchiveDecoder.DecodeInto(Byte[] buffer, Int32 offset, Int32 count)
at ManagedLzma.SevenZip.Reader.BcjArchiveDecoder.Read(Byte[] buffer, Int32 offset, Int32 count)
at ManagedLzma.SevenZip.Reader.DecodedStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.Stream.InternalCopyTo(Stream destination, Int32 bufferSize)

Zetanova commented

without a password and a single file (700kb)
it is landing in a live lock where 1core is at 100%

Zetanova commented

LZMA and LZMA2 makes the same problems.
I reseted the 7-zip to the default compression settings.

Using .net4.6.2

weltkante commented

I'll take a look at the weekend and see if I can reproduce this behavior.

weltkante commented

I was able to reproduce both issues using 7zip 18.01 but it needs further investigation to determine what causes them. Maybe the updated 7zip/lzma codebase changed something and now triggers unexpected codepaths. I'll have a look at what code has changed in the recent releases.