[Sanjays2402]

Summary

• Guard shortest-only completion when the root prompt has no arguments.
• Add regression coverage for an empty root prompt.

Testing

• pytest

[Copilot]

🟢 Approval recommended

The change is a minimal, correct guard for an empty-list edge case and includes a focused regression test covering the reported failure mode.

Pull request overview

This PR fixes an edge-case bug in ClickCompleter when shortest_only=True and completion is requested at the empty root prompt, preventing an args[-1] access on an empty args list and adding a regression test to lock in the behavior.

Changes:

• Guard shortest-only option selection against an empty args list in _get_completion_for_cmd_args.
• Add a regression test ensuring shortest-only completion works at an empty root prompt and produces no stdout output.

File summaries

File	Description
click_repl/_completer.py	Prevents indexing into an empty args list when applying shortest_only option filtering.
tests/test_completion/test_common_tests/test_option_completion.py	Adds regression coverage for completing at an empty root prompt with shortest_only=True.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Lite

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