p2p: fix flaky TestWithReceiveTimeout on QUIC

[pinebit]

TestWithReceiveTimeout fails intermittently in CI on the QUIC iteration:

--- FAIL: TestWithReceiveTimeout (0.47s)
    Error: Error "write request: stream reset (remote): code: 0x0: transport error:
           stream 4 canceled by remote with error code 0" does not contain "read response: EOF"

The test registers the server handler with WithReceiveTimeout(0), so the read deadline in p2p/receive.go is already expired when the handler starts. ReadMsg fails instantly and the deferred s.Close() tears the stream down — the CI log shows this happening 101µs in. Meanwhile the client is still in WriteMsg. Nothing synchronises the two, so which call reports the failure depends on who wins the race.

The transport decides the usual winner. The test loops over both:

• TCP/yamux — Close() is a graceful FIN. The in-flight write is absorbed by the buffer and succeeds, so the failure surfaces at the read as EOF. Deterministic.
• QUIC — Close() with unread incoming data emits STOP_SENDING/RESET_STREAM. If that lands mid-write, WriteMsg fails first and the read is never reached.

The assertion only allowed the first outcome, so a loaded runner could flip it. This is the same class of QUIC behaviour sender.go already tolerates via isCanceledStreamErr, whose comment notes these errors appear "much more frequently when QUIC is enabled" — that handling just does not extend to WriteMsg.

This accepts either terminal error on the QUIC iteration. The TCP iteration stays strict, since it has no race, and an unrelated error still fails on both.

category: test
ticket: none

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.55%. Comparing base (2eb6798) to head (5a8886a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4606      +/-   ##
==========================================
- Coverage   57.58%   57.55%   -0.03%     
==========================================
  Files         246      246              
  Lines       33675    33675              
==========================================
- Hits        19392    19383       -9     
- Misses      11845    11850       +5     
- Partials     2438     2442       +4     

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