Possible fix to race condition to EBADF

src/context/memory.rs

@@ -71,8 +71,11 @@ impl UnmapResult {
             return Ok(());
         };
 
+        /// TODO: This is not ideal, the lock must be held until try_close(), however that would break borrowing rules.
+        /// Proper unmap operation would be a recursive operation, since closing a file can trigger another unmap().
+        /// We should refactor Result of munmap() to handle unmap and closing files recursively.
         let (scheme_id, number) = {
-            let desc = description.read(token.token());
+            let desc = description.write(token.token());
             (desc.scheme, desc.number)
         };