net/http/internal/http2: TestTransportBlockingRequestWrite/trailer failures

[gopherbot]

#!watchflakes
default <- pkg == "net/http/internal/http2" && test == "TestTransportBlockingRequestWrite/trailer"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestTransportBlockingRequestWrite/trailer
    transport_test.go:4264: http://127.0.0.1:37869
    transport_test.go:4331: created 3 connections, want 1
--- FAIL: TestTransportBlockingRequestWrite/trailer (0.02s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net/http/internal/http2" && test == "TestTransportBlockingRequestWrite/trailer"

2026-03-23 20:47 gotip-linux-amd64-longtest-race go@f26befb3 net/http/internal/http2.TestTransportBlockingRequestWrite/trailer (log)

=== RUN   TestTransportBlockingRequestWrite/trailer
    transport_test.go:4264: http://127.0.0.1:37869
    transport_test.go:4331: created 3 connections, want 1
--- FAIL: TestTransportBlockingRequestWrite/trailer (0.02s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net/http/internal/http2" && test == "TestTransportBlockingRequestWrite/trailer"

2026-03-12 15:09 gotip-linux-arm64_debian13 go@99089680 net/http/internal/http2.TestTransportBlockingRequestWrite/trailer (log)

=== RUN   TestTransportBlockingRequestWrite/trailer
    transport_test.go:4393: http://127.0.0.1:44727
    transport_test.go:4460: created 3 connections, want 1
--- FAIL: TestTransportBlockingRequestWrite/trailer (0.01s)

— watchflakes