Fixes

Author: fniephaus

src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/image/SqueakImageContext.java

@@ -431,7 +431,6 @@ public boolean toggleCurrentMarkingFlag() {
     }
 
     public void setLastHash(final int lastHash) {
-        assert this.lastHash == 0;
         this.lastHash = lastHash;
     }
 

src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/image/SqueakImageReader.java

@@ -99,7 +99,7 @@ private void readImage(final MappedByteBuffer buffer) {
         final long dataSize = buffer.getLong();
         final long oldBaseAddress = buffer.getLong();
         specialObjectsPointer = buffer.getLong();
-        final long lastHash = buffer.getLong();
+        image.setLastHash((int) buffer.getLong());
         final long snapshotScreenSize = buffer.getLong();
         final long headerFlags = buffer.getLong();
         // extraVMMemory
@@ -120,8 +120,6 @@ private void readImage(final MappedByteBuffer buffer) {
         final long firstSegmentSize = buffer.getLong();
         // freeOldSpace
         buffer.getLong();
-
-        image.setLastHash(MiscUtils.toIntExact(lastHash));
         image.flags.initialize(oldBaseAddress, headerFlags, snapshotScreenSize, maxExternalSemaphoreTableSize);
 
         skip(buffer, headerSize - buffer.position());