Related: #11217 ? Similar at least.

I do not see how this is similar to #11217. In #11217 different tests were creating executable with the same name, running it and deleting it. This is not happening here. Only TestLocalImportsHard creates ./hard.exe, runs it and deletes it.

I cannot reproduce it here, but I will keep looking into it.

Alex

I'm not sure how trybot is working on gpc, when the tests got timeout, all of processes will be killed correctly?

@mattn, @bradfitz can say for sure, but I believe we start a whole new Windows VM for each trybot run. There shouldn't be any previous runs involved.

@alexbrainman, it's not true that only TestLocalImportsHard creates hard.exe. So does TestBadImportsHard. They should run separately, and in any case, TestLocalImportsHard should be first, and TestBadImportsHard should not begin until the former is done. Regardless, I'll send a CL using different executable names. Then maybe we can close this until we see the flake again.

@mattn, @bradfitz can say for sure, but I believe we start a whole new Windows VM for each trybot run. There shouldn't be any previous runs involved.

Correct.

@alexbrainman, it's not true that only TestLocalImportsHard creates hard.exe. So does TestBadImportsHard.

Perhaps I am mistaken, but TestBadImportsHard calls copyBad (before it gets around to create hard.exe), but copyBad never returns on windows - it calls t.Skipf.

Alex

CL https://golang.org/cl/31815 mentions this issue.

Just hit this again in https://storage.googleapis.com/go-build-log/d61981d9/windows-386-gce_1a546ff6.log

Cannot reproduce with:

VM=$(gomote create windows-386-gce)
gomote push $VM
gomote run $VM go/src/make.bat
gomote run -path '$WORKDIR/go/bin,$PATH' $VM go/bin/go test -run=TestLocalImportsHard -count=100 cmd/go
gomote run -path '$WORKDIR/go/bin,$PATH' $VM go/bin/go test -timeout=20m -run=TestLocalImportsHard -v -count=1000 cmd/go

Just got another:

https://storage.googleapis.com/go-build-log/c2e01024/windows-amd64-gce_7605eed0.log

--- FAIL: TestLocalImportsHard (0.45s)
	go_test.go:310: running testgo [build -o ./hard.exe testdata\local\hard.go]
	go_test.go:197: remove ./hard.exe: Access is denied.
FAIL
FAIL	cmd/go	95.629s

Hmm, I ran this for 20 minutes. But it doesn't reproduce.
(FYI: I use symantec endpoint protection)

myexe.go

package main

import (
	"fmt"
	"time"
)

func main() {
	time.Sleep(time.Second)
	fmt.Println("ok")
}

test.go

package main

import (
	"fmt"
	"log"
	"os"
	"os/exec"
)

func main() {
	for {
		b, err := exec.Command("go", "build", "-o", "myexe.exe", "myexe.go").Output()
		if err != nil {
			log.Fatal(err)
		}
		b, err = exec.Command("myexe.exe").Output()
		if err != nil {
			log.Fatal(err)
		}
		fmt.Print(string(b))
		err = os.Remove("myexe.exe")
		if err != nil {
			log.Fatal(err)
		}
	}
}

No update since June when we could not reproduce the problem. Timed out.

(Starting to wonder about virus scanners.)