On Tue, Mar 10, 2020 at 3:25 AM Dan Kortschak <d...@kortschak.io> wrote: > > I have a package that is dependent on bazil.org/fuse for testing via a > sysfs simulation package github.com/ev3go/sisyphus. > > For historical reasons, the travis testing used the -a flag (since > removed because of the issue described here). > > Since Go1.14, the standard runtime tests on travis passed, but the > -race tests hang. This is replicable on my local hardware (requiring a > reboot to continue working on the codebase since a fuse mount remains > after the hang, preventing access to the code directory). > > Running tests on either bazil.org/fuse or the intermediate dependency > the same way does not cause the hang. This suggests to me that I'm > probably doing something wrong with a lock and I'm deadlocking the fuse > system in the kernel. > > However, when I remove the -a flag from the go test -race invocation, > the tests complete and there is no complaint about data races. Nor does > the hang happen with Go versions prior to Go1.14. > > Can anyone suggest why -a has this effect? or what has changed between > 1.13 and 1.14 that might cause this? (Bisecting would be painful since > it requires a reboot between iterations). > > The repository in question is github.com/ev3go/ev3dev and the PR that > illustrates the issue is https://github.com/ev3go/ev3dev/pull/90.
I do not know what is happening, and what you are describing sounds like a bug. The presence or absence of the -a flag should never change the behavior of a program. In early Go releases the -a flag was useful to force a rebuild of installed packages. But the last several Go releases have used a build cache. If the -a flag changes program behavior, that suggests that something is wrong with the build cache. I suppose you could see whether `go clean -cache` fixes the problem. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcXEV0Ur6fm67Wfmbp-cxDJYa7d_Feyy26rtyhhZM%2BwAiQ%40mail.gmail.com.
