Commits on Feb 1, 2024

1. Reset history counter even when @loaded_history_lines is not defined …

   The issue (https://github.com/ruby/debug/issues/1064) is caused by a
   combination of factors:
   
   1. When user starts an IRB session without a history file, the
      `@loaded_history_lines` ivar is not defined.
   2. If the user then starts the `irb:rdbg` session, the history counter
      is not set, because the `@loaded_history_lines` is not defined.
   3. Because `irb:rdbg` saves the history before passing Ruby expression
      to the debugger, it saves the history with duplicated lines. The number
      grows in exponential order.
   4. When the user exits the `irb:rdbg` session, the history file could be
      bloated with duplicated lines.
   
   This commit fixes the issue by resetting the history counter even when
   `@loaded_history_lines` is not defined.

   

   st0012 committed Feb 1, 2024
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