Hi Guix, After the recent Go 1.13 update, the test for mongo-tools package (currently at vervsion 3.4.0) fails with: ``` flag provided but not defined: -test.testlogfile Usage of /tmp/guix-build-mongo-tools-3.4.24.drv-0/go-build972699285/b001/mongofiles.test: -convey-json When true, emits results in JSON blocks. Default: 'false' -convey-silent When true, all output from GoConvey is suppressed. -convey-story When true, emits story output, otherwise emits dot output. When not provided, this flag mirros the value of the '-test.v' flag -test.types string Comma-separated list of the types of tests to be run (default "unit") FAIL github.com/mongodb/mongo-tools/mongofiles 0.002s FAIL command "go" "test" "-v" "github.com/mongodb/mongo-tools/mongofiles" failed with status 1 ``` I believe that this is related to a change in Go's testing module with 1.13: https://golang.org/doc/go1.13#testing For more information, also see the Go bug report: https://github.com/golang/go/issues/31859 Note that mongo-tools provides a number of tools in different Go packages, and the mongofiles tool is the only one that has this error. I have tried to adding a call to flag.Parse() in TestMain, which I added, as described in the documentation [0], but that did not resolve the problem. I'm not exactly sure why. The same fix worked for containerd [1]. [0] https://golang.org/pkg/testing/#hdr-Main [1] http://git.savannah.gnu.org/cgit/guix.git/commit/?id=13c8e747e86e39c0a8c6ec7da8c812d9bbcb682b I wonder if the difference is that mongofiles does not use the flag package directly, but flag.Parse() is being called in the wrong place in one of its dependencies. A note on versions: the problem persists in the latest release of mongo-tools in the 3.4 series, 3.4.24. I have not tried the other release series, 3.6, 4.0, and 4.2 because those require dependencies not yet packaged in Guix. I have opened a bug report upstream: https://jira.mongodb.org/browse/TOOLS-2482 Thoughts or suggestions? Best, Jack