Sqlite: unfinalized statements error

[stbalbach]

I'm new to SQL so don't know if I'm doing something wrong or this is a bug.

The following produces runtime error: "Error: unhandled exception: unable to 
close due to unfinalized statements or unfinished backups [DbError]"

The code is mostly adapted from 'Nim in Action'. The first run on db creation 
is OK and on second run it crashes.
    
    
    import db_sqlite
    
    type
      Database* = ref object
        db: DbConn
    
    proc newDb*(filename = "pages.db"): Database =
      new result
      result.db = open(filename, "", "", "")
    
    proc close*(database: Database) =
      database.db.close()
    
    proc setup*(database: Database) =
      
      database.db.exec(sql"""
        CREATE TABLE IF NOT EXISTS Pages(
          id text PRIMARY KEY,
          pagesocr text
        );
      """)
    
    proc insert*(database: Database, id, pagesocr: string): bool 
{.discardable.} =
      try:
        database.db.exec(sql"INSERT INTO Pages VALUES(?, ?);", id, pagesocr)
      finally:
        return false
      true
    
    proc find(database: Database, id: string): string =
      result = database.db.getValue(sql"SELECT pagesocr FROM Pages WHERE id = 
?;", id)
    
    var db = newDb()
    db.setup()
    db.insert("bub_aaa", "1,2,3,0,6")
    db.insert("bub_ddd", "1,2,3,0,7")
    echo db.find("bub_ddd")
    db.close()
    
    
    Run