net/http: TestDeleteRedirects/h1 failures

[gopherbot]

#!watchflakes
default <- pkg == "net/http" && test == "TestDeleteRedirects/h1"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestDeleteRedirects/h1
=== PAUSE TestDeleteRedirects/h1
=== CONT  TestDeleteRedirects/h1
==================
WARNING: DATA RACE
Read at 0x00c0000dc863 by goroutine 7850:
  testing.(*common).logDepth()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1023 +0x504
  testing.(*common).log()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1010 +0xa4
...
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:2159 +0x8be
  testing.(*M).Run()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:2027 +0xf17
  net/http_test.TestMain()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/net/http/main_test.go:24 +0x64
  main.main()
      _testmain.go:1225 +0x2d4
==================
    testing.go:1398: race detected during execution of test
--- FAIL: TestDeleteRedirects/h1 (0.04s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "net/http" && test == "TestDeleteRedirects/h1"

2024-03-22 16:33 gotip-linux-amd64-race go@1c864333 net/http.TestDeleteRedirects/h1 (log)

=== RUN   TestDeleteRedirects/h1
=== PAUSE TestDeleteRedirects/h1
=== CONT  TestDeleteRedirects/h1
==================
WARNING: DATA RACE
Read at 0x00c0000dc863 by goroutine 7850:
  testing.(*common).logDepth()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1023 +0x504
  testing.(*common).log()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:1010 +0xa4
...
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:2159 +0x8be
  testing.(*M).Run()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/testing/testing.go:2027 +0xf17
  net/http_test.TestMain()
      /home/swarming/.swarming/w/ir/x/w/goroot/src/net/http/main_test.go:24 +0x64
  main.main()
      _testmain.go:1225 +0x2d4
==================
    testing.go:1398: race detected during execution of test
--- FAIL: TestDeleteRedirects/h1 (0.04s)

— watchflakes

[cherrymui]

Dup of #66519.