There is a class of potential bugs in WiredTiger where the content of the metadata table may be in an invalid state if a hard-crash occurs at just the wrong time. A possible way to add testing of those cases (which is generally difficult) would be to create a test that:

• Does a schema operation (or set of schema operations).
• Has logging enabled.
• Do:

  while (log_file_not_empty) {
      ./wt list -v
      echo "verify the content of the output"
      ./wt log_truncate <MAX_LSN - 1> # I made this up - AFAIK it doesn't currently exist.
  }
  

A set of interesting schema operations includes:

• Creating a simple table.
• Creating a table with column groups.
• Creating an LSM tree with more than one chunk.
• Doing a create then a rename operation.
• Doing a create then a drop operation.