x/build: apparent filesystem corruption on darwin-amd64-11_0

[bcmills]

#!watchflakes
post <- pkg ~ `^cmd/go` && `unexpected input character '\\x00'`

            > cp go.mod.orig go.mod
            > go mod edit -go=1.17
            [stderr]
            go: errors parsing go.mod:
            $WORK/gopath/src/go.mod:1: unexpected input character '\x00'
            [exit status 1]
            FAIL: testdata/script/mod_lazy_downgrade.txt:80: unexpected command failure

greplogs --dashboard -md -l -e 'unexpected input character ..x00.'

2022-04-21T23:41:03-21e1ffe/darwin-amd64-11_0
2021-10-18T16:32:38-543a513/darwin-amd64-11_0
2021-09-24T04:20:30-aa878ee/darwin-amd64-11_0
2021-08-25T03:13:06-e1fcf88/darwin-amd64-11_0
2021-06-02T21:39:28-dd7ba3b/darwin-amd64-11_0
2021-04-30T18:07:24-c3365ad/darwin-amd64-11_0

I almost wonder if this is the amd64 equivalent of #49692. 🤔

@golang/release, what version of MacOS 11 is the builder running at the moment?

[dmitshur]

what version of MacOS 11 is the builder running at the moment?

It's running macOS 11.1 (20C69) based on a recent build containing "Darwin 20.2.0", "xnu-7195.60.75~1" and https://en.wikipedia.org/wiki/MacOS_Big_Sur#Release_history.

Also see #51851 where the macOS 11 arm64 builder was updated on March 22, though from the older 11.0. Do you know if that is making a difference for #49692?

[bcmills]

Also see #51851 where the macOS 11 arm64 builder was updated on March 22, though from the older 11.0. Do you know if that is making a difference for #49692?

It appears to be, yes! (Added a comment on that issue and closed it.)

[bcmills]

Still just the 11_0 builder.

greplogs -l -e 'unexpected input character ..x00.' --since=2022-04-22
2022-05-24T17:47:42-d5ae7a6/darwin-amd64-11_0

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg ~ `^cmd/go` && `unexpected input character '\\x00'`

2022-09-23 15:14 darwin-amd64-11_0 go@68fa3696 cmd/go.TestScript (log)

go test proxy running at GOPROXY=http://127.0.0.1:54034/mod
--- FAIL: TestScript (0.03s)
    --- FAIL: TestScript/mod_require_exclude (1.19s)
        script_test.go:282: 
            # (2022-09-23T15:30:03Z)
            # build with no newer version to satisfy exclude (0.010s)
            # With the selected version excluded, commands that query that version without
            # updating go.mod should fail. (0.097s)
            # The failure message should be clear when -mod=vendor is implicit. (0.139s)
            # With the selected version excluded, commands that load only modules should
            # drop the excluded module. (0.035s)
            # With the latest version excluded, 'go list' should resolve needed packages
            # from the next-highest version. (0.457s)
            # build with newer version available (0.343s)
            # build with excluded newer version (0.045s)
            > cp go.mod3 go.mod
            > go list -mod=mod -f '{{with .Module}}{{.Path}} {{.Version}}{{end}}' all
            [stderr]
            go: errors parsing go.mod:
            $WORK/gopath/src/go.mod:1: unexpected input character '\x00'
            [exit status 1]
            FAIL: testdata/script/mod_require_exclude.txt:58: unexpected command failure

— watchflakes