feat(journal): add smaller failing test

src/journal/src/Journal.hs

@@ -307,3 +307,11 @@ tj = do
   putStrLn ("read bytestring: '" ++ BSChar8.unpack bs ++ "'")
   dumpMetadata (jMetadata jour)
   return ()
+
+tbc :: IO ()
+tbc = do
+  bb <- allocate 16
+  bc <- newBufferClaim bb 0 16
+  putBS bc "helloooooooooooo"
+  bs <- getByteStringAt bb 0 5
+  putStrLn (BSChar8.unpack bs)

src/journal/src/Journal/Internal/BufferClaim.hs

@@ -7,14 +7,15 @@ import Foreign.Ptr (Ptr)
 
 import Journal.Internal.ByteBufferPtr
 import Journal.Types
+import Journal.Internal.Utils
 
 ------------------------------------------------------------------------
 
 newtype BufferClaim = BufferClaim ByteBuffer
 
 newBufferClaim :: ByteBuffer -> TermOffset -> Int -> IO BufferClaim
-newBufferClaim src offset len = BufferClaim <$>
-  wrapPart src (fromIntegral offset) len
+newBufferClaim src (TermOffset offset) len = BufferClaim <$>
+  wrapPart src (int322Int offset) len
 
 putBS :: BufferClaim -> ByteString -> IO ()
 putBS (BufferClaim bb) bs = putByteString bb bs

src/journal/src/Journal/Internal/ByteBufferPtr.hs

@@ -149,10 +149,10 @@ invariant bb = do
 ------------------------------------------------------------------------
 -- * Create
 
--- allocate :: Int -> IO ByteBuffer
--- allocate capa@(I# capa#) = IO $ \s ->
---   case newPinnedByteArray# capa# s of
---     (# s', mba# #) -> unIO (newByteBuffer mba# (Capacity capa) (Limit capa) 0 Nothing) s'
+allocate :: Int -> IO ByteBuffer
+allocate size = do
+  fptr <- mallocForeignPtrBytes size
+  newByteBuffer fptr (Capacity size) (Limit size) 0 Nothing
 
 allocateAligned :: Int -> Int -> IO ByteBuffer
 allocateAligned size align = do