net/http: TestServerReaderFromOrder failures

[gopherbot]

#!watchflakes
post <- pkg == "net/http" && test == "TestServerReaderFromOrder"  && `handler Copy = 0; want `

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestServerReaderFromOrder (0.00s)
    --- FAIL: TestServerReaderFromOrder/h1 (0.06s)
        serve_test.go:3881: handler Copy = 0; want 3145728
        serve_test.go:3902: Body = ""; want hi

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net/http" && test == "TestServerReaderFromOrder"

2024-01-09 18:15 linux-amd64-boringcrypto go@a95136a8 net/http.TestServerReaderFromOrder (log)

--- FAIL: TestServerReaderFromOrder (0.00s)
    --- FAIL: TestServerReaderFromOrder/h1 (0.06s)
        serve_test.go:3881: handler Copy = 0; want 3145728
        serve_test.go:3902: Body = ""; want hi

— watchflakes

[bcmills]

This is the regression test for #5660.

Actually, given the other failures in that test log (#56421 (comment)), I suspect that this was caused by a stray Dial from another test after a port used by that other test was reused in TestServerReaderFromOrder.

This might also explain #59038.

[bcmills]

Commit a95136a is also on release-branch.go1.20; closing as “possibly obsolete”.