non-async ace works

src/SharpCompress/Common/Ace/Headers/AceHeader.cs

@@ -66,7 +66,7 @@ namespace SharpCompress.Common.Ace.Headers
         {
             // Read header CRC (2 bytes) and header size (2 bytes)
             var headerBytes = new byte[4];
-            if (stream.Read(headerBytes, 0, 4) != 4)
+            if (!stream.ReadFully(headerBytes))
             {
                 return Array.Empty<byte>();
             }
@@ -80,7 +80,7 @@ namespace SharpCompress.Common.Ace.Headers
 
             // Read the header data
             var body = new byte[HeaderSize];
-            if (stream.Read(body, 0, HeaderSize) != HeaderSize)
+            if (!stream.ReadFully(body))
             {
                 return Array.Empty<byte>();
             }

src/SharpCompress/Readers/Ace/AceReader.cs

@@ -28,9 +28,6 @@ public abstract partial class AceReader : AbstractReader<AceEntry, AceVolume>
         _archiveEncoding = Options.ArchiveEncoding;
     }
 
-    private AceReader(Stream stream, ReaderOptions options)
-        : this(options) { }
-
     /// <summary>
     /// Derived class must create or manage the Volume itself.
     /// AbstractReader.Volume is get-only, so it cannot be set here.
@@ -43,6 +40,12 @@ public abstract partial class AceReader : AbstractReader<AceEntry, AceVolume>
 
     protected override IEnumerable<AceEntry> GetEntries(Stream stream)
     {
+        if (_volume == null)
+        {
+            _volume = new AceVolume(stream, Options, 0);
+            ValidateArchive(_volume);
+        }
+
         var mainHeaderReader = new AceMainHeader(_archiveEncoding);
         var mainHeader = mainHeaderReader.Read(stream);
         if (mainHeader == null)
@@ -50,17 +53,11 @@ public abstract partial class AceReader : AbstractReader<AceEntry, AceVolume>
             yield break;
         }
 
-        if (mainHeader?.IsMultiVolume == true)
+        if (mainHeader.IsMultiVolume)
         {
             throw new MultiVolumeExtractionException("Multi volumes are currently not supported");
         }
 
-        if (_volume == null)
-        {
-            _volume = new AceVolume(stream, Options, 0);
-            ValidateArchive(_volume);
-        }
-
         var localHeaderReader = new AceFileHeader(_archiveEncoding);
         while (true)
         {

tests/SharpCompress.Test/TestBase.cs

@@ -191,7 +191,7 @@ public class TestBase : IAsyncDisposable
             .EnumerateFiles(ORIGINAL_FILES_PATH, "*.*", SearchOption.AllDirectories)
             .ToLookup(path => Path.GetExtension(path));
 
-        Assert.Equal(extracted.Count, original.Count);
+        Assert.Equal( original.Count, extracted.Count);
 
         foreach (var orig in original)
         {