Stream_accept uses bare except that swallows all exceptions

[Andy-Jost]

Description

Stream_accept in _stream.pyx uses a bare except: pass when probing whether a foreign object supports the __cuda_stream__ protocol. This catches all exceptions, including KeyboardInterrupt, SystemExit, and RuntimeError from malformed protocol implementations.

Current behavior

try:
 stream = Stream._init(arg)
except:
 pass

Any exception raised during Stream._init is silently swallowed, including:

• RuntimeError from a buggy __cuda_stream__ implementation (e.g., wrong return format)
• TypeError from internal failures within __cuda_stream__()
• KeyboardInterrupt, SystemExit

Expected behavior

Only the specific TypeError indicating the object lacks __cuda_stream__ should be caught. All other exceptions should propagate so that protocol implementation bugs are surfaced.

Proposed fix

Narrow the catch to except TypeError as e with a string check for "__cuda_stream__" in the message, which matches the specific TypeError raised by _handle_from_stream_protocol when the attribute is missing.