Summary by CodeRabbit

• New Features

  • More explicit awaitable resolution and validation for await/yield operations, improving handling of objects that provide awaitables.

• Bug Fixes

  • Clearer, more specific error messages when non-awaitable objects are used in async contexts (including async with).
  • Prevents awaiting the same coroutine more than once, reducing runtime surprises and improving async-with robustness.

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