[csvance]

Bug fix: close(grpc) (grpc_shutdown) cleaned up in-flight requests without setting an exception, so grpc_async_await returned whatever was buffered (usually an empty response) as a success. The same applied to response streams cut off by shutdown. In-flight requests now fail with UNAVAILABLE. This is the fix released in 1.1.2.

Behaviour change: a request submitted to a handle that is not running, or queued for a max_streams slot when the handle shuts down, now raises UNAVAILABLE instead of FAILED_PRECONDITION. A shut-down handle is usually being reset (grpc_shutdown then grpc_init), so the call is retryable; gRPC's status guidance reserves FAILED_PRECONDITION for "do not retry until state is fixed". grpc-java uses UNAVAILABLE for calls on a shut-down channel. A caller racing a reset now sees one retryable code whether its request was in flight, queued, or new.

An uninitialized handle shares the code, since the handle cannot distinguish it from a shut-down one; the message still names grpc_init().

Changes

• src/Curl.jl: set UNAVAILABLE on unfinished requests in close; use UNAVAILABLE at the three shut-down submission and queue sites
• Tests: new testset for in-flight unary calls and submission after shutdown; the stalled-consumer shutdown test and the queued-request test now expect UNAVAILABLE
• Docs and skills: exception contract and status tables updated; the skills table's claim that shutdown produced CANCELLED was incorrect and is removed

Callers matching on FAILED_PRECONDITION for a shut-down handle need to update; worth a line in the 1.2 release notes.

🤖 Generated with Claude Code

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.72%. Comparing base (f9b4443) to head (7b5f783).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #147   +/-   ##
=======================================
  Coverage   92.72%   92.72%           
=======================================
  Files           8        8           
  Lines         948      949    +1     
=======================================
+ Hits          879      880    +1     
  Misses         69       69           

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